KR102346202B1 - Radar module and automotive radar apparatus having the same - Google Patents

Abstract

A radar module according to an embodiment of the present invention, a transmit antenna element for transmitting a transmit signal; a reception antenna element for receiving a reception signal according to the reflection of the transmission signal; and a communication element comprising a plurality of transmit channels connected to the transmit antenna element and a plurality of receive channels connected to the receive antenna element, the communication element processing the transmit signal and the receive signal; and, the transmit antenna element comprises: , a first transmission antenna unit connected to a first transmission channel among the plurality of transmission channels, a second transmission antenna unit connected to a second transmission channel among the plurality of transmission channels, and a third transmission channel among the plurality of transmission channels and a third transmit antenna unit connected to a channel, wherein the first transmit antenna unit and the third transmit antenna unit are respectively disposed on both sides of the second transmit antenna unit with the second transmit antenna unit interposed therebetween, It has a mutually symmetric structure around the transmit antenna unit.

Description

RADAR MODULE AND AUTOMOTIVE RADAR APPARATUS HAVING THE SAME

The present invention relates to a vehicle radar device, and more particularly, to a vehicle radar device including a short-range and long-range radar module.

Radar devices are being applied to various technical fields, and recently, they are mounted on a vehicle to improve the mobility of the vehicle. Such a radar device detects information on the surrounding environment of the vehicle by using electromagnetic waves. And, as the corresponding information is used for the movement of the vehicle, the efficiency of vehicle mobility may be improved. To this end, the radar device is provided with an antenna to transmit and receive electromagnetic waves.

On the other hand, vehicle radar may be classified into a long range radar device (LRR) and a short range radar device (SRR). For radar devices, the 24 GHz band is mainly used.

In order to secure FOV (Field Of View) and detection distance for vehicle radar, including both long-range and short-range radar devices, to simultaneously detect long-range and short-range objects, optimal spacing between antenna channels and It is necessary to secure antenna gain.

An embodiment of the present invention provides a radar module including a transmit antenna element and a receive antenna element commonly connected to one communication element, and a vehicle radar device including the same.

In addition, in an embodiment according to the present invention, a radar module capable of detecting an object within a long-range, medium-range, and short-range range using one transmit antenna element through a combination of transmit antennas respectively connected to different transmit channels of the communication element. And it provides a vehicle radar device including the same.

In addition, an embodiment of the present invention provides a radar module capable of removing a balun by using a differential line of each channel of a communication element as a power supply line as it is, and a radar device for a vehicle including the same.

In addition, an embodiment of the present invention provides a radar module including an antenna element configured with a plurality of transmit antenna arrays having a left-right symmetry structure, and a vehicle radar device including the same.

The technical tasks to be achieved in the proposed embodiment are not limited to the technical tasks mentioned above, and other technical tasks not mentioned are clear to those of ordinary skill in the art to which the proposed embodiment belongs from the description below. can be understood clearly.

A radar module according to an embodiment of the present invention, a transmit antenna element for transmitting a transmit signal; a reception antenna element for receiving a reception signal according to the reflection of the transmission signal; and a communication element comprising a plurality of transmit channels connected to the transmit antenna element and a plurality of receive channels connected to the receive antenna element, the communication element processing the transmit signal and the receive signal; and, the transmit antenna element comprises: , a first transmission antenna unit connected to a first transmission channel among the plurality of transmission channels, a second transmission antenna unit connected to a second transmission channel among the plurality of transmission channels, and a third transmission channel among the plurality of transmission channels and a third transmit antenna unit connected to a channel, wherein the first transmit antenna unit and the third transmit antenna unit are respectively disposed on both sides of the second transmit antenna unit with the second transmit antenna unit interposed therebetween, It has a mutually symmetric structure around the transmit antenna unit.

In addition, the first transmitting antenna unit includes a first feeding point, a first feeding line extending from the first feeding point, and a plurality of first feeding lines on both sides of the first feeding line being spaced apart from each other by a predetermined distance and alternately disposed. It includes radiators, and the third transmitting antenna unit is alternately disposed at a predetermined distance from each other on both sides of a second feeding point, a second feeding line extending from the second feeding point, and the second feeding line, and a plurality of second radiators symmetrical to the plurality of first radiators.

In addition, among the plurality of first radiators, a radiator adjacent to the first feeding point is arranged on the first feeding line in a first direction perpendicular to the first feeding line, and among the plurality of second radiators, the radiator The radiators adjacent to the second feeding point are arranged on the second feeding line in a second direction perpendicular to the second feeding line, and the first direction is opposite to the second direction.

In addition, the first transmit antenna unit includes a plurality of first antenna arrays having the same structure as each other, and the second transmit antenna unit includes a plurality of second antenna arrays having the same structure as each other, and the plurality of first antenna arrays have the same structure. Each of the first antenna arrays has a symmetric structure with the plurality of second antenna arrays.

In addition, the first transmit antenna unit includes a first impedance matching unit connected to a differential line of the first channel of the communication element, and the third transmit antenna unit includes a differential line of the third channel of the communication element and and a second impedance matching unit connected thereto, wherein a shape of the first impedance matching unit is symmetrical to that of the second impedance matching unit.

In addition, the second transmit antenna unit includes a power feeding unit, and a plurality of radiators spaced apart from each other at a predetermined interval on one side of the feeding unit, and the feeding unit is directly connected to a differential line of the second channel of the communication element. and the differential line of the second channel constitutes a part of a feed line of the second transmit antenna unit.

In addition, the second transmission antenna unit includes a third feed line connected to a first line among the differential lines of the second channel, and a plurality of third radiators disposed on one side of the third feed line spaced apart from each other by a predetermined distance. a first array unit, a fourth feed line connected to a second line among the differential lines of the second channel; 2 includes an array unit.

In addition, the plurality of third radiators are arranged on the third feed line in a first direction perpendicular to the third feed line, and the plurality of fourth radiators are disposed on the fourth feed line on the fourth feed line It is arranged in a second direction perpendicular to, and the first direction is opposite to the second direction.

In addition, the first array unit has a symmetrical structure with the second array unit.

In addition, the plurality of third radiators are inclined at a predetermined angle on the third power supply line, and the plurality of fourth radiators are inclined at a predetermined angle on the fourth power supply line, and the plurality of third radiators are inclined at a predetermined angle. They are disposed to face the plurality of fourth radiators on the third feed line.

In addition, the first transmitting antenna and the third transmitting antenna are medium-range sensing antennas, and the second transmitting antenna is a short-range sensing antenna.

On the other hand, a vehicle radar device according to an embodiment includes a case; and a printed circuit board accommodated in the case and on which a radar module is mounted, wherein the radar module comprises: a transmit antenna element for transmitting a transmit signal; a receive antenna element for receiving a receive signal according to reflection of the transmit signal; , A communication element comprising a plurality of transmit channels connected to the transmit antenna element and a plurality of receive channels connected to the receive antenna element, the communication element processing the transmit signal and the receive signal; including, wherein the transmit antenna element comprises: , a first transmission antenna unit connected to a first transmission channel among the plurality of transmission channels, a second transmission antenna unit connected to a second transmission channel among the plurality of transmission channels, and a third transmission channel among the plurality of transmission channels a third transmission antenna unit connected to a channel, wherein the first transmission antenna unit includes a first feeding point, a first feeding line extending from the first feeding point, and a predetermined distance from each other on both sides of the first feeding line A plurality of first radiators are spaced apart and arranged alternately, and the third transmitting antenna unit includes a second feeding point, a second feeding line extending from the second feeding point, and on both sides of the second feeding line. The plurality of first radiators and a plurality of second radiators having a symmetrical structure are provided alternately spaced apart from each other by a predetermined distance.

According to an embodiment of the present invention, the volume of the radar device can be minimized by integrating the communication element for transmission and the communication element for reception, which are previously separated into one communication element, thereby lowering the product price. .

In addition, according to an embodiment of the present invention, by implementing an optimized radar antenna beam pattern according to road driving conditions, it is possible to reduce the risk of a traffic accident due to improvement in blind spot improvement and target detection.

In addition, according to an embodiment of the present invention, by implementing the radar module, which has been previously separated into a long-range antenna, a short-range antenna, and an intermediate-range antenna, into one integrated type, it is possible to achieve a reduction in the size of the radar module, Accordingly, there is an effect of freedom in vehicle design and cost reduction.

In addition, in the embodiment according to the present invention, by forming a plurality of transmit antenna arrays in a symmetrical structure, the same power and a signal of the same phase can be supplied to the plurality of transmit antenna arrays, and accordingly, between the plurality of transmit antenna arrays It can solve the signal imbalance problem that occurs.

In addition, according to the embodiment of the present invention, by removing the balun disposed on the signal line of the centrally disposed transmit antenna array among the plurality of transmit antenna arrays, the asymmetry of the signal line and the left and right asymmetry of the radiation pattern can be solved. , it is possible to improve the detection characteristics accordingly.

1 is an exploded perspective view of a vehicle radar device according to an embodiment of the present invention.
2 is a block diagram illustrating an internal configuration of a radar module according to an embodiment of the present invention.
3 is a perspective view illustrating a radome of a vehicle radar device according to an embodiment of the present invention and a printed circuit board on which the radar module is disposed.
4 is a diagram specifically illustrating a plurality of antenna arrays according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating an antenna array structure of the first transmit antenna unit 411 shown in FIG. 4 .
FIG. 6 is a diagram illustrating an antenna array structure of the third transmit antenna unit 413 shown in FIG. 4 .
FIG. 7 is a diagram illustrating an antenna array structure of the second transmit antenna unit 412 shown in FIG. 4 .
FIG. 8 is a diagram illustrating a modified example of the antenna array structure of the second transmit antenna unit 412 shown in FIG. 7 .
9 is a view showing the overall structure of a transmit antenna element according to an embodiment of the present invention.
10 is a view showing the overall structure of a transmit antenna element according to another embodiment of the present invention.
11 is a gain graph according to a combined operation of a transmit antenna unit according to an embodiment of the present invention.
12 is a gain graph according to individual operation of each transmit antenna according to an embodiment of the present invention.
13 to 17 are diagrams illustrating a connection configuration of a radar module in each operation mode according to an embodiment of the present invention.
18 is a cross-sectional view showing a radome and a printed circuit board of the vehicle radar device according to the first embodiment of the present invention.
19 is a plan view of the radome of the vehicle radar device according to the first embodiment of the present invention.
20 is a plan view of a radome of a vehicle radar device according to a second embodiment of the present invention.
21 is a cross-sectional view illustrating a radome and a printed circuit board of a radar device for a vehicle according to a third embodiment of the present invention.
22 is a plan view of a radome of a vehicle radar device according to a third embodiment of the present invention.
23 is a plan view illustrating a vehicle radar device according to an embodiment of the present invention mounted on the rear side of the vehicle.
24 is a flowchart for explaining step-by-step a method for controlling a vehicle radar apparatus according to the first embodiment of the present invention.
25 is a flowchart for explaining step by step a method of controlling a radar apparatus for a vehicle according to a second embodiment of the present invention.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

The vehicle described in this specification may be a concept including an automobile and a motorcycle. Hereinafter, the vehicle will be mainly described with respect to the vehicle.

The vehicle described herein may be a concept including all of an internal combustion engine vehicle having an engine as a power source, a hybrid vehicle having an engine and an electric motor as a power source, an electric vehicle having an electric motor as a power source, and the like.

In the following description, the left side of the vehicle means the left side in the driving direction of the vehicle, and the right side of the vehicle means the right side in the driving direction of the vehicle.

1 is an exploded perspective view of a vehicle radar device according to an embodiment of the present invention.

Referring to FIG. 1 , the vehicle radar device 100 includes a case 110 , a connector 120 , an auxiliary printed circuit board (PCB, 130 ), a bracket ( 140 ), and a printed circuit board 150 . , a shielding unit 160, a radome 170 and a waterproof ring (waterproof ring; 180).

The case 110 may accommodate the connector 120 , the auxiliary printed circuit board 130 , the bracket 140 , the printed circuit board 150 , and the shielding unit 160 .

The connector 120 may transmit/receive a signal between the vehicle radar device 100 and an external device. For example, the connector 120 may be a CAN (controller area network; CAN) connector, but is not limited thereto.

The auxiliary printed circuit board 130 may be equipped with circuits for power and signal processing, but is not limited thereto.

The bracket 140 may block noise generated during the signal processing process of the auxiliary printed circuit board 130 .

A plurality of antenna arrays and an integrated circuit (IC) chip connected to the plurality of antenna arrays may be mounted on the printed circuit board 150 . The plurality of antenna arrays may include a plurality of wide-angle antennas arranged in a line, but is not limited thereto. The IC chip may be a millimeter wave radio frequency IC (RFIC), but is not limited thereto.

The IC chip is commonly connected to the transmitting antenna and the receiving antenna, and thus is an integrated communication device that processes both the transmit signal and the receive signal.

In addition, the plurality of antenna arrays may include a transmit antenna element and a receive antenna element. Here, the transmit antenna element may include a plurality of transmit antenna arrays configured with a single channel respectively connected to different transmit channels of the communication element. That is, the transmit antenna array includes antenna arrays of a first transmit antenna connected to a first transmit channel of the communication element, antenna arrays of a second transmit antenna connected to a second transmit channel of the communication element, and the communication element and antenna arrays of a third transmit antenna connected to a third transmit channel of . The receive antenna element may include a plurality of receive antenna arrays respectively connected to different receive channels of the communication element .

According to an embodiment, the auxiliary printed circuit board 130 may have the plurality of antenna arrays and IC chips connected to the plurality of antenna arrays mounted thereon. The auxiliary printed circuit board 130 and the printed circuit board 150 may be disposed to be spaced apart from each other with the bracket 140 interposed therebetween.

The shielding unit 160 may shield the RF signal generated from the IC chip of the printed circuit board 150 . To this end, the shielding unit 160 may be formed in a region corresponding to the IC chip of the printed circuit board 150 .

The radome 170 may accommodate the printed circuit board 150 to protect the printed circuit board 150 , and the radome 170 may be coupled to the case 110 . The radome 170 may be made of a material having less attenuation of radio waves, and may be an electrical insulator.

The waterproof ring 180 is disposed between the radome 170 and the case 110 to prevent the vehicle radar device 100 from being submerged. For example, the waterproof ring 180 may be formed of an elastic material.

2 is a block diagram illustrating an internal configuration of a radar module according to an embodiment of the present invention, and FIG. 3 is a perspective view illustrating a radome of a vehicle radar device according to an embodiment of the present invention and a printed circuit board on which the radar module is disposed. to be.

2 and 3 , the printed circuit board 150 may include a plurality of antenna units including a plurality of antenna arrays and a communication element 430 .

The plurality of antenna units including the plurality of antenna arrays may include a transmit antenna element 410 and a receive antenna element 420 disposed on the printed circuit board 150 .

The transmit antenna element 410 may include a radiator (to be described later), and the radiator radiates a signal from the transmit antenna element 410 . That is, the radiator forms a radiation pattern of the transmit antenna element 410 . Here, the radiator is arranged along the feed line, and the radiator is made of a conductive material. The radiator may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

The transmit antenna element 410 may include a plurality of transmit antenna units including a plurality of antenna arrays. In addition, the plurality of transmit antenna units are respectively connected to different transmit channels of the communication element 430 , and selectively form the radiation pattern according to a signal supplied through the communication element 430 .

The reception antenna element 420 may include a plurality of reception antenna arrays and may include a radiator. The radiator forms a radiation pattern of the receiving antenna element 420 . Here, the radiator is arranged along the feed line, and is made of a conductive material. In addition, the radiator may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

The communication element 430 is connected to the plurality of antenna arrays. The communication element 430 may include, for example, a millimeter wave RFIC. The communication element 430 generates a transmission signal from the transmission data and outputs it to the transmission antenna element 410 , receives the signal from the reception antenna element 420 and generates reception data from the reception signal.

The controller 440 may drive the radar module 100 to detect a front object while the vehicle is driving. That is, the controller 440 controls the radar module 100 to detect an object existing in a surrounding area at the current location of the vehicle. In addition, the control unit 440 processes the transmitted data and the received data transmitted and received through the radar module 100 . The controller 440 may control the communication element 430 to generate a transmission signal from transmission data. The controller 440 may control the communication element 430 to generate received data from the received signal. The controller 440 may synchronize the transmitted data and the received data. The controller 440 may perform a CFAR operation, a tracking operation, a target selection operation, and the like with the received data to extract angle information, speed information, and distance information about the target.

The radome 170 may include a cover portion 171 disposed to face the printed circuit board 150 , and an edge portion 173 coupled to the case 110 . The printed circuit board 150 may be disposed in a space formed by a height difference between the cover portion 171 and the edge portion 173 of the radome 170 .

The radome 170 may define a direction in which the plurality of antenna arrays are sequentially disposed as a Y-axis direction, and a direction perpendicular to a direction in which the plurality of antenna arrays are sequentially disposed may be defined as a Y-axis direction, A direction perpendicular to the plurality of antenna arrays may be defined as a Z-axis direction.

4 is a diagram specifically illustrating a plurality of antenna arrays according to an embodiment of the present invention.

Referring to FIG. 4 , the communication element 430 is commonly connected to the transmit antenna element 410 and the receive antenna element 420 .

The communication element 430 has a plurality of transmit channels connected to the transmit antenna element 410 and a plurality of receive channels connected to the receive antenna element 420 .

Preferably, the communication device 430 may include a first transmission channel (CH1), a second transmission channel (CH2), and a third transmission channel (CH3). Also, the communication device 430 may include a first reception channel CH1 , a second reception channel CH2 , a third reception channel CH3 , and a fourth reception channel CH4 .

The transmit antenna element 410 includes a first transmit antenna unit 411 connected to the first transmit channel CH1, a second transmit antenna unit 412 connected to the second transmit channel CH2, and the third It may include a third transmit antenna unit 413 connected to the transmit channel CH3.

In addition, the reception antenna element 420 includes a first reception antenna unit 421 connected to the first reception channel CH1, a second reception antenna unit 422 connected to the second reception channel CH2, It may include a third reception antenna unit 423 connected to the third reception channel (CH3), and a fourth reception antenna unit 424 connected to the fourth reception channel (CH4).

In this case, in an embodiment of the present invention, the first to third transmit antenna units 411 , 412 , and 413 may be antennas composed of a single channel and a plurality of arrays having different structures. Preferably, the first to third transmit antenna units 411 , 412 , and 413 have a second transmit antenna unit 412 disposed in the center, and the first transmit antennas on both sides of the second transmit antenna unit 412 . A unit 411 and the third transmit antenna unit 413 may be respectively disposed.

In this case, the first transmit antenna unit 411 and the third transmit antenna unit 413 have different antenna structures. In other words, the first transmit antenna unit 411 and the third transmit antenna unit 413 have a large-layer structure with respect to the second transmit antenna unit 412 .

Also, the first transmit antenna unit 411 and the third transmit antenna unit 413 are the same type of antenna. In other words, the first transmit antenna unit 411 and the third transmit antenna unit 413 are Middle Range Radar (MRR).

Accordingly, the first transmit antenna unit 411 and the third transmit antenna unit 413 detect an object within a mid-range using a frequency of the same band.

Meanwhile, as described above, since the first transmit antenna unit 411 and the third transmit antenna unit 413 are antennas of the same type, they have the same array structure. The arrangement direction or spacing of the radiators of the array constituting the first transmit antenna unit 411 is the same as the arrangement direction and spacing of the radiators of the array constituting the third transmit antenna unit 413 .

At this time, as described above, the first transmit antenna unit 411 and the third transmit antenna unit 413 are disposed in different directions with respect to the second transmit antenna unit 412 . Accordingly, a phase difference occurs between the first transmit antenna unit 411 and the third transmit antenna unit 413, and in order to compensate for the phase difference, the first transmit antenna unit 411 and the third transmit antenna unit 411 3 The shape of the balun constituting the transmit antenna unit 413 is changed.

That is, the length of the balun constituting the first transmit antenna unit 411 is different from the length of the balun constituting the third transmit antenna unit 413, and according to the asymmetric structure of the balun, the first transmit antenna unit ( 411) and the third transmit antenna unit 413 have an asymmetry problem. Accordingly, in the related art, in the case of an antenna device having the first transmit antenna unit 411 and the third transmit antenna unit 413 , signals of the same power and the same phase are transmitted to the first transmit antenna unit 411 and the third transmit antenna unit 411 . It was difficult to input each to the transmit antenna unit 413 .

Therefore, in the present invention, the balun constituting the first transmit antenna unit 411 and the balun constituting the first transmit antenna unit 411 by making the array structures of the first transmit antenna unit 411 and the third transmit antenna unit 413 have a mutually symmetrical structure. , such that a symmetrical structure is also formed between the baluns constituting the third transmit antenna unit 413 .

The array structure of the first transmit antenna unit 411 and the array structure of the third transmit antenna unit 413 will be described in more detail below.

In addition, the second transmit antenna unit 412 is different from the first transmit antenna unit 411 and the third transmit antenna unit 413 without an additional configuration such as a balun connected to a differential line of a communication element, and the communication directly connected to the device. That is, the second transmit antenna unit 412 does not include a structure such as a balun connected to the differential line. This is because the antenna array structure of the first transmit antenna unit 411 has a mutually symmetrical structure with the antenna array structure of the third transmit antenna unit 413 .

Accordingly, the second transmit antenna unit 412 uses the differential line of the communication element as a power supply line as it is. That is, in the related art, the second transmission antenna unit 412 could not use the differential line of the communication element as a power supply line as it is, and impedance matching such as a balun is performed between the differential line and the second transmission antenna unit 412 . An additional device had to be placed for However, in the present invention, the element such as the balun, which had to be disposed at the front end of the second transmit antenna unit 412, can be eliminated, and thus the sensing characteristic can be improved while securing the design freedom of the antenna array.

In addition, the second transmit antenna unit 412 is a short range radar (SRR) differently from the first transmit antenna unit 411 and the second transmit antenna unit 412 .

A detailed array structure of the first to third transmit antenna units will be described in more detail below.

Accordingly, the transmit antenna element 410 in the first embodiment of the present invention is a combination of the first to third transmit antenna units 411, 412, 413 connected to each of the transmit channels (CH1, CH2, CH3). through different radiation patterns.

The reception antenna element 420 includes the first to fourth reception antenna units 421 , 422 , 423 , and 424 as described above, thereby receiving a reception signal for the transmission signal transmitted through the transmission antenna element 410 . can receive

Meanwhile, the communication device 430 may generate a transmission signal from the transmission data. To this end, the communication element 430 may output a transmission signal to the transmission antenna element 410 through each transmission channel. To this end, the communication element 430 may include an oscillator (not shown), for example, the oscillator may include a voltage controlled oscillator (VCO) and an oscillator (oscillator).

Also, the communication element 430 may receive a reception signal from the reception antenna element 420 . The communication device 430 may generate received data from the received signal. To this end, the communication device 430 may include a low noise amplifier (LNA; not shown) and an analog-to-digital converter (ADC; not shown). The low noise amplifier may amplify the received signal to low noise, and the analog-to-digital converter may generate the received data by converting the received signal from an analog signal to digital data.

That is, the transmit antenna element 410 may transmit a transmit signal to the air, and the receive antenna element 420 may receive a receive signal from the air. Here, the transmission signal represents a radio signal transmitted from the radar module 10 . The received signal represents a radio signal flowing into the radar module 100 as the transmitted signal is reflected by the target TARGET.

On the other hand, in an embodiment of the present invention, the first transmit antenna unit 411 is a transmit antenna array for a medium range, the second transmit antenna unit 412 is a transmit antenna array for a short distance, and the third transmit antenna unit 413 ) is a medium-range transmission antenna array having a symmetric structure with the first transmission antenna unit 411 .

At this time, as shown in the drawing, the antenna array of the short-distance transmit antenna unit constituting the second transmit antenna unit 412 constitutes the first transmit antenna array 411 and the third transmit antenna array 413 . It may be formed in a size smaller than that of a transmission antenna array for a medium range.

In addition, the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 are configured as a single channel to be connected to different transmit channels of the communication element 430 , respectively. can be In addition, each of the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 may be configured as a single array. It may consist of an array.

On the other hand, according to the embodiment of the present invention, it was confirmed that the pattern of the main beam radiated from the antenna element is very wide, which brings the following effects.

That is, when an antenna element is used by one channel, it has ERIP (equivalent isotropically radiated power), which is the sum of the general antenna gain and the transmit power, but in the present invention, as the transmit power in each channel increases, it has a higher ERIP. . For example, conventionally, it has an ERIP of 25 dBm, which is the sum of 15 dBi (Antenna Gain) and 10 dBm (Tx power). , the overall performance can be improved by about 4.7dB.

FIG. 5 is a view showing the antenna array structure of the first transmit antenna unit 411 shown in FIG. 4, and FIG. 6 is a view showing the antenna array structure of the third transmit antenna unit 413 shown in FIG. FIG. 7 is a diagram illustrating an antenna array structure of the second transmit antenna unit 412 shown in FIG. 4 . Also, FIG. 8 is a view showing a modified example of the antenna array structure of the second transmit antenna unit 412 shown in FIG. 7 .

Referring to FIG. 5 , the first transmit antenna unit 411 may include a single channel composed of a plurality of arrays. In addition, the first transmitting antenna unit 411 may include a power feeding unit including a feeding line and a feeding point, and a plurality of radiators.

In an embodiment, the first transmit antenna unit 411 may include a first array a1 and a second array a2. Meanwhile, in the drawings, it is said that the first transmit antenna unit 411 includes only the first array a1 and the second array a2, but this is only an embodiment, and the first transmit antenna unit 411 is The number of constituting antenna arrays may be further increased.

In an embodiment, the first array a1 may include a feed line 4111 , a feed point 4118 , and a plurality of radiators.

The feed line 4111 may be disposed to extend from the feed point 4118 to supply signals to the plurality of radiators. The feed lines 4111 extend in one direction and are arranged parallel to each other in the other direction. The feed line 4111 is disposed to be spaced apart from each other at a predetermined interval, and a signal may be transmitted from one end of the feed line 4111 to the other end.

The feeding point 4118 may be connected to one end of the feeding line 4111 to supply a signal to the feeding line 4111 .

The plurality of radiators radiate signals from the first transmit antenna unit 411 .

The plurality of radiators form a radiation pattern of the first transmit antenna unit 411 . The plurality of radiators are dispersedly disposed on the feed line 4111 . The plurality of radiators are arranged along feed lines 4111 .

Meanwhile, an impedance matching unit (not shown) such as a balanced-to-unbalanced is disposed between the feeding line 4111 and the feeding point 4118 . The impedance matching unit is connected to a plurality of differential lines between the feeding point 4118 and the communication element, and performs impedance matching accordingly to output the plurality of differential lines as one signal line. In addition, the single signal line may be branched in a plurality of directions to be connected to the plurality of antenna arrays.

In the first transmit antenna unit 411 according to an embodiment of the present invention, the plurality of radiators are not disposed only on one side of the feed line 4111 , but are disposed on both sides of the feed line 4111 , respectively.

A signal is supplied from the feed line 4111 to the radiators 4115 and 4116 . The plurality of radiators are made of a conductive material. Here, the plurality of radiators may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

The second array a2 may include a feed line 4112 , a feed point 4118 , and a plurality of radiators.

The first transmit antenna unit 411 according to an embodiment of the present invention has a radiator disposed in the first array a1 and the second array a2 to form a radiation pattern that minimizes side lobes. It can be arranged to cross each other so that the interval between the phase centers (center points in the emitter) of is λ/2 or less.

That is, the interval H1 between the radiator 4113 of the first array a1 and the radiator 4114 of the second array a2 is set to be λ/2 or less.

In addition, the interval H2 between the radiators 4113 and 4115 of the first array a1 is set to be less than or equal to λ.

In addition, the interval H3 between the phase centers of the radiator 4116 of the first array a1 and the radiator 4117 of the second array a2 is λ/2 or less.

In other words, the interval H1 between the radiators 4113 of the first array a1 and the radiators 4114 of the second array a2 is λ/2 or less, and the radiator 4113 of the first array a1 is The distance H2 between the and 4115 is set to be λ or less, and the distance H3 between the phase centers of the radiators 4116 of the first array a1 and the radiators 4117 of the second array a2 is λ/2. By placing it below, side lobes can be minimized.

Also, the size of the radiator may be different as it extends from the feeding point 4118 to the center of the feeding line 4111 . For example, the radiator disposed in the center of the feed line 4111 is arranged so that the horizontal width is narrower and the vertical width is wider than that of the radiator adjacent to the feeding point 4118, so that the radiation is concentrated in the center of the feed line 4111 to form the side lobes. can be minimized

In an embodiment, the first transmit antenna unit 411 is a transmit antenna for a medium range, which exists in a range between a 77 GHz band, which is a frequency used by the long-distance transmit antenna, and a 24 GHz band, which is a frequency used by the short-distance transmit antenna. A frequency may be used, but is not limited thereto.

On the other hand, the radiators 4119a and 4119b disposed closest to the feeding point 4118 among the first array a1 and the second array a2 of the first transmitting antenna unit 411 have respective feed lines 4111 , 4112) are arranged in the same direction as each other.

In this case, the first transmit antenna unit 411 is disposed on the left side of the second transmit antenna unit 412 with the second transmit antenna unit 412 as a center. Accordingly, among the radiators constituting the first array a1 and the second array a2 of the first transmission antenna unit 411, the radiators 4119a and 4119b disposed closest to the feeding point 4118 are respectively. It may be arranged in the left direction of the feed lines (4111, 4112) of the.

In addition, upper radiators adjacent to the radiators 4119a and 4119b may be arranged in a right direction of the feed lines 4111 and 4112 opposite to the direction in which the radiators 4119a and 4119b are arranged.

Consequently, the first array a1 and the second array a2 constituting the first transmit antenna unit 411 may have the same shape.

Referring to FIG. 6 , the third transmit antenna unit 413 may include a single channel composed of a plurality of arrays. In addition, the third transmitting antenna unit 413 may include a power feeding unit including a feeding line and a feeding point, and a plurality of radiators.

In an embodiment, the third transmit antenna unit 413 may include a first array a1 and a second array a2. Meanwhile, in the drawings, it is said that the third transmit antenna unit 413 includes only the first array a1 and the second array a2, but this is only an embodiment, and the third transmit antenna unit 411 is The number of constituting antenna arrays may be further increased.

Preferably, the number of arrays of the third transmit antenna unit 413 is equal to the number of arrays of the first transmit antenna unit 411 . That is, when the number of arrays of the first transmit antenna unit 411 is four, the number of arrays of the third transmit antenna unit 413 is also four. However, the arrangement of radiators of the array of the third transmit antenna unit 413 is not the same as that of the array of the first transmit antenna unit 411 and has a symmetrical structure.

In an embodiment, the first array a1 may include a feed line 4131 , a feed point 4138 , and a plurality of radiators.

The feed line 4131 may be disposed to extend from the feed point 4138 to supply signals to the plurality of radiators. The feed lines 4131 extend in one direction and are arranged parallel to each other in the other direction. The feed line 4131 is disposed to be spaced apart from each other at a predetermined interval, and a signal may be transmitted from one end of the feed line 4131 to the other end.

The feeding point 4138 may be connected to one end of the feeding line 4131 to supply a signal to the feeding line 4131 .

The plurality of radiators radiate signals from the third transmit antenna unit 413 .

The plurality of radiators form a radiation pattern of the third transmit antenna unit 413 . The plurality of radiators are dispersedly disposed on the feed line 4131 . The plurality of radiators are arranged along feed lines 4131 .

Meanwhile, an impedance matching unit (not shown) such as a balanced-to-unbalanced is disposed between the feeding line 4131 and the feeding point 4138 . The impedance matching unit is connected to a plurality of differential lines between the feeding point 4138 and the communication element, and performs impedance matching accordingly to output the plurality of differential lines as one signal line. In addition, the single signal line may be branched in a plurality of directions to be connected to the plurality of antenna arrays.

In this case, the shape of the impedance matching unit included in the third transmission antenna unit 413 corresponds to the shape of the impedance matching unit included in the first transmission antenna unit 411 . Preferably, the impedance matching unit included in the first transmit antenna unit 411 may be bent at a predetermined distance in the left direction with respect to the differential line of the first channel of the communication element. Accordingly, the impedance matching unit included in the third transmit antenna unit 413 may be bent at a predetermined distance in the right direction with respect to the differential line of the third channel of the communication device. Preferably, the impedance matching unit included in the first transmission antenna unit 411 has a symmetrical structure with the impedance matching unit included in the third transmission antenna unit 413 .

In addition, in the third transmit antenna unit 413 according to an embodiment of the present invention, the plurality of radiators are not disposed only on one side of the feed line 4131 , but are disposed on both sides of the feed line 4131 , respectively.

A signal is supplied from the feed line 4131 to the radiators 4134 and 4135 . The plurality of radiators are made of a conductive material. Here, the plurality of radiators may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

The second array a2 may include a feed line 4132 , a feed point 4138 , and a plurality of radiators.

The third transmit antenna unit 413 according to an embodiment of the present invention is a radiator disposed in the first array a1 and the second array a2 to form a radiation pattern that minimizes side lobes. It can be arranged to cross each other so that the interval between the phase centers (center points in the emitter) of is λ/2 or less.

That is, the distance H4 between the radiators 4133 of the first array a1 and the radiators 4134 of the second array a2 is set to be λ/2 or less, and between the radiators 4114 of the first array a1 and The interval H5 between the 4115 is set to be λ or less, and the interval H6 between the phase centers of the radiators 4136 of the first array a1 and the phase centers of the radiators 4137 of the second array a2 is λ/2 or less. side lobes can be minimized.

In other words, the interval H1 between the radiators 4113 of the first array a1 and the radiators 4114 of the second array a2 is λ/2 or less, and the radiator 4113 of the first array a1 is The distance H2 between the and 4115 is set to be λ or less, and the distance H3 between the phase centers of the radiators 4116 of the first array a1 and the radiators 4117 of the second array a2 is λ/2. By placing it below, side lobes can be minimized.

Also, the size of the radiator may be different as it extends from the feeding point 4138 to the center of the feeding line 4131 . For example, the radiator disposed in the center of the feed line 4131 is arranged so that the horizontal width is narrower and the vertical width is wider than that of the radiator adjacent to the feeding point 4138, so that the radiation is concentrated in the center of the feed line 4131 to form the side lobes. can be minimized

In an embodiment, the third transmit antenna unit 413 is a transmit antenna for a medium range, and is present in a range between a 77 GHz band, which is a frequency used by the long-distance transmit antenna, and a 24 GHz band, which is a frequency used by the short-distance transmit antenna. A frequency may be used, but is not limited thereto.

On the other hand, the radiators 4139a and 4139b disposed closest to the feeding point 4138 among the first array a1 and the second array a2 of the third transmitting antenna unit 413 have respective feed lines 4131 . , 4132) are arranged in the same direction as each other.

In this case, the third transmit antenna unit 411 is disposed on the right side of the second transmit antenna unit 412 with the second transmit antenna unit 412 as the center. Accordingly, among the radiators constituting the first array a1 and the second array a2 of the third transmit antenna unit 413, the radiators 4139a and 4139b disposed closest to the feeding point 4138 are respectively. It may be arranged in the right direction of the feed lines (4131, 4132) of the.

That is, in the related art, the arrangement direction of the radiators 4119a and 4119b included in the first transmit antenna unit 411 is the same as the arrangement direction of the radiators 4139a and 4139b included in the third transmit antenna unit 413 . was the direction. In other words, in the related art, the array of the first transmit antenna unit 411 has the same shape and structure as the array of the third transmit antenna unit 413 . Accordingly, in the prior art, the first transmit antenna unit 411 and the third transmit antenna unit 413 had an asymmetric structure with the second transmit antenna unit 412 as the center, and thus the same power and the same phase It was difficult to input the signal.

However, in the present invention, the array of the first transmit antenna unit 411 has a symmetrical structure, not the same structure as that of the third transmit antenna unit 413 . Here, the symmetric structure includes not only the feed line and the radiator constituting the array, but also an impedance matching unit such as a balun connected to the feed line.

In addition, the upper radiators adjacent to the radiators 4139a and 4139b of the third transmission antenna unit 413 are in a direction opposite to the arrangement direction of the radiators 4139a and 4139b in the left direction of the feed lines 4131 and 4132. can be arranged.

Consequently, the first array a1 and the second array a2 constituting the third transmit antenna unit 413 may have the same shape.

Referring to FIG. 7 , the second transmit antenna unit 412 may include a plurality of arrays, for example, a first array a1 and a second array a2 . The second transmit antenna unit 412 is disposed between the first transmit antenna unit 411 and the third transmit antenna unit 413 .

The second transmission antenna unit 412 may include a feeding unit including a feeding line and a feeding point, and a plurality of radiators. In an embodiment, the first array (a1) may include a feed line 4122, a feed point 4121, and a plurality of radiators.

The feed line 4122 may be disposed to extend from the feed point 4121 to supply signals to the plurality of radiators. The feed line 4122 extends in one direction and is arranged parallel to each other in the other direction. The feed line 4122 is spaced apart from each other at a predetermined interval, and a signal may be transmitted from one end of the feed line 4122 to the other end.

The feeding point 4121 may be disposed at one end of the feeding line 4122 to supply a signal to the feeding line 4122 .

In this case, the feeding point 4121 is not connected to an impedance matching unit such as the balun, but is directly connected to a signal line of the communication element 430 . Preferably, the feeding point 4121 is directly connected to a first line among the differential lines of the communication device 430 to receive a signal from the first line. In other words, the second transmit antenna unit 412 may receive the signal by using the differential line constituting the second channel of the communication element 430 as a feed line as it is.

A plurality of radiators radiate signals from the second transmit antenna unit 412 . The plurality of radiators form a radiation pattern of the second transmit antenna unit 412 . The plurality of radiators are dispersedly disposed on the feed line 4122 . The plurality of radiators are arranged along feed lines 4122 . Through this, a signal is supplied from the feed line 4122 to the radiators 4123 , 4124 , and 4125 . The plurality of radiators are made of a conductive material. Here, the plurality of radiators may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

In this case, the plurality of radiators 4123 , 4124 , and 4125 arranged along the feed line 4122 may be disposed in only one direction of the feed line 4122 . Preferably, the radiators 4123 , 4124 , and 4125 of the first array a1 may be arranged only in the left direction of the feed line 4122 .

The second array a2 may include a feed line 4126 , a feed point 4125 , and a plurality of radiators.

The feed line 4126 may be disposed to extend from the feed point 4125 to supply signals to the plurality of radiators. The feed line 4126 extends in one direction and is arranged parallel to each other in the other direction. The feed line 4126 is disposed to be spaced apart from each other at a predetermined interval, and a signal may be transmitted from one end of the feed line 4126 to the other end.

The feed point 4125 may be disposed at one end of the feed line 4126 to supply a signal to the feed line 4126 .

In this case, the feeding point 4125 is not connected to an impedance matching unit such as the balun, but is directly connected to a signal line of the communication element 430 . Preferably, the feeding point 4125 is directly connected to a second line among the differential lines of the communication device 430 to receive a signal from the second line. In other words, the second transmit antenna unit 412 may receive the signal by using the differential line constituting the second channel of the communication element 430 as a feed line as it is.

A plurality of radiators radiate signals from the second transmit antenna unit 412 . The plurality of radiators form a radiation pattern of the second transmit antenna unit 412 . The plurality of radiators are dispersedly disposed on the feed line 4126 . The plurality of radiators are arranged along feed lines 4126 . Through this, a signal is supplied from the feed line 4126 to the radiator 4127 . The plurality of radiators are made of a conductive material. Here, the plurality of radiators may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

In this case, the plurality of radiators 4127 arranged along the feed line 4126 may be disposed in only one direction of the feed line 4126 . Preferably, the radiators 4127 of the second array a2 may be arranged only in the right direction of the feed line 4126 .

In other words, the first array a1 and the second array a2 constituting the second transmit antenna unit 412 have a mutually symmetrical structure. Accordingly, the plurality of radiators disposed on the first array a1 corresponds to the plurality of radiators disposed on the second array a2 .

Preferably, the radiator disposed at the lowermost side of the first array a1 is arranged side by side with the radiator disposed at the bottom side of the second array a2. That is, the imaginary straight line L1 connecting the center of the first radiator of the first array a1 and the center of the second radiator of the second array a2 corresponding to the first radiator is the feed line ( 4122, 4126) and intersect vertically.

In addition, in order to form a uniform radiation pattern while minimizing side lobes, the second transmit antenna unit 412 according to an embodiment of the present invention is provided in the first array a1 and the second array a2. They are arranged side by side so that the phase centers (center points in the radiator) of the radiators to be disposed are positioned at the same location.

At this time, as for the side lobe, when the energy distribution of radio waves radiated from the antenna is divided into several directions, the lobe in the direction of the maximum radiation energy is called the main lobe, and the radiation in other directions is called the minor lobe. , a lobe radiating in an undesired direction is called a side lobe. The side lobe level refers to the lobe level with the greatest power among lobes radiating in an undesired direction. If there are few side lobes radiated in directions other than the main lobe among the horizontal pattern of antenna directivity, the antenna efficiency is high.

In addition, in the second transmit antenna unit 412 according to an embodiment of the present invention, the two arrays use the differential line of the communication element 430 as a feed line as it is, and the radiators are identical to each other rather than cross-arranged. By arranging at the position, it is possible to form a radiation pattern with an extended beam width with minimal side lobes.

On the other hand, although side lobes are generated in a general antenna array, the second transmit antenna unit 412 according to an embodiment of the present invention is designed such that the interval between the antenna patches is within half a wavelength so that there is no distinction between the main lobe and the side lobe. It may be implemented so that there is no boundary between the lobe and the side lobe.

Also, since the radiator of the first array a1 and the radiator of the second array a2 are arranged at the same position, the distance between the radiator of the first array a1 and the radiator of the second array a2 is becomes 0.

Then, the interval H7 between the radiators 4123, 4124, and 4125 of the first array a1 and the interval H7 between the radiators 4127 of the second array a2 are λ or less. let e.

In addition, as it extends from the feeding points 4121 and 4125 to the center of the feeding lines 4122 and 4126, the shape and size of the radiator may be different. For example, the radiator disposed in the center of the feed lines 4122 and 4126 is arranged such that the horizontal width l1 is narrower and the vertical width l2 is wider than the radiators adjacent to the feeding points 4121 and 4125, so that the feed line 4121, 4125), the radiation is concentrated in the center to minimize the side lobes.

In an embodiment, the second transmit antenna unit 412 may use a 24 GHz band as a short-distance transmit antenna, but is not limited thereto.

Meanwhile, in the second transmit antenna unit 412 according to the first embodiment of the present invention, in each array, the radiators are vertically bent from the feed line with the feed line as the center, and are disposed. That is, the second transmit antenna unit 412 is vertically bent from the feed line while the radiators face each other in each array.

Alternatively, in the second transmit antenna unit 412 according to the second embodiment of the present invention, the radiators may be disposed with a predetermined inclination angle with respect to the feed line rather than the vertical direction in the respective arrays.

In this case, the first array a1 and the second array a2 of the second transmit antenna unit 412 do not have a mutually symmetric structure. In other words, the radiators of the first array a1 and the radiators of the second array a2 have a predetermined phase difference. Accordingly, when the radiators of the first array a1 are arranged in a vertical direction with respect to the feed line, the radiators of the second array a2 are also arranged in the vertical direction with respect to the feed line.

However, when the radiators of the first array (a1) are disposed to be inclined at a certain angle in the upper direction with respect to the feed line, the radiators of the second array (a2) are inclined at a certain angle in the lower direction rather than the upper direction with respect to the feed line. placed obliquely.

Referring to FIG. 8 , the second transmit antenna unit 412 may include a first array a1 and a second array a2 .

In addition, the first array a1 includes a feed line 4121a and a plurality of first radiators 4122a arranged along the feed line 4121a. In addition, the second array a2 includes a feed line 4121b and a plurality of second radiators 4122b arranged along the feed line 4121b.

In this case, the first radiators 4122b and the second radiators 4122b are disposed to face each other at a predetermined angle from each feed line.

In other words, the first radiators 4122a are disposed to be inclined at a predetermined angle upward on the feed line. Accordingly, the second radiators 4122b are disposed to be inclined at a predetermined angle in a downward direction opposite to the first radiators 4122a on the feed line.

That is, the first radiators 4122a are disposed so that the central portion of the first radiator 4122a is inclined at a first angle θ1 in the upper left direction with respect to the line L1 perpendicular to the feed line.

In addition, the second radiators 4122b are disposed so that the central portion of the second radiators 4122b is inclined at a second angle θ2 in the lower right direction with respect to the line L1 perpendicular to the feed line. In this case, the first angle θ1 and the second angle θ2 are equal to each other. Accordingly, the first radiators 4122a and the second radiators 4122b face each other on the feed line and are arranged to be inclined at a predetermined angle.

According to an embodiment of the present invention, the volume of the radar device can be minimized by integrating the communication element for transmission and the communication element for reception, which are previously separated into one communication element, thereby lowering the product price. .

In addition, according to an embodiment of the present invention, by implementing an optimized radar antenna beam pattern according to road driving conditions, it is possible to reduce the risk of a traffic accident due to improvement in blind spot improvement and target detection.

In addition, according to an embodiment of the present invention, by implementing the radar module, which has been previously separated into a long-range antenna, a short-range antenna, and an intermediate-range antenna, into one integrated type, it is possible to achieve a reduction in the size of the radar module, Accordingly, there is an effect of freedom in vehicle design and cost reduction.

In addition, in the embodiment according to the present invention, by forming a plurality of transmit antenna arrays in a symmetrical structure, the same power and a signal of the same phase can be supplied to the plurality of transmit antenna arrays, and accordingly, between the plurality of transmit antenna arrays It can solve the signal imbalance problem that occurs.

In addition, according to the embodiment of the present invention, by removing the balun disposed on the signal line of the centrally disposed transmit antenna array among the plurality of transmit antenna arrays, the asymmetry of the signal line and the left and right asymmetry of the radiation pattern can be solved. , it is possible to improve the detection characteristics accordingly.

9 is a view showing the overall structure of a transmit antenna element according to an embodiment of the present invention.

Referring to FIG. 9 , the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 according to an embodiment of the present invention constitute one transmit antenna element. do.

As described above, the second transmit antenna unit 412 is disposed at the center of the transmit antenna element, and the first transmit antenna unit 411 and the third transmit antenna unit 413 are the second transmit antennas. They are respectively disposed on both sides of the portion 412 as a center.

Also, the radiator of the first transmission antenna unit 411 and the radiator of the second transmission antenna unit 412 may be disposed to cross each other.

Preferably, the first transmit antenna unit 411 includes a first array and a second array as described above. In addition, among the radiators constituting the second array of the first transmission antenna unit 411 , the radiators arranged on the right side of the transmission line intersect with the radiators of the first array of the second transmission antenna unit 412 . are placed

At this time, in order to form a radiation pattern that minimizes side lobes, the phase center of the radiator of the second array of the first transmit antenna unit 411 and the second transmit antenna unit 412 The spacing between phase centers (center points in the radiator) of the radiators disposed in the first array may be λ/2 or less, and may be disposed to cross each other.

In addition, the radiator of the third transmit antenna unit 413 and the radiator of the second transmit antenna unit 412 may be disposed to cross each other.

Preferably, the third transmit antenna unit 413 includes a first array and a second array as described above. In addition, among the radiators constituting the first array of the third transmission antenna unit 413 , the radiators arranged on the left side of the transmission line intersect with the radiators of the second array of the second transmission antenna unit 412 . are placed

At this time, in order to form a radiation pattern that minimizes side lobes, the phase center of the radiator of the first array of the third transmit antenna unit 413 and the second transmit antenna unit 412 The spacing between phase centers (center points in the radiator) of the radiators disposed on the second array may be λ/2 or less, so that they may be disposed to cross each other.

Meanwhile, as described above, the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 include a plurality of arrays each including a radiator. Radiators included in the array have a shape in which the vertical width increases as the distance from the feeding point increases.

10 is a view showing the overall structure of a transmit antenna element according to another embodiment of the present invention.

Referring to FIG. 10 , in the transmit antenna element, unlike the transmit antenna element shown in FIG. 9 , a central radiator has the largest vertical width among radiators included in each array constituting the transmit antenna element.

That is, the transmit antenna element includes a first transmit antenna unit 411a, the second transmit antenna unit 412a, and a third transmit antenna unit 413a.

In addition, the first transmit antenna unit 411a includes a first array and a second array. In addition, the first array has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. Also, in the first array, the upper and lower widths of the radiator decrease again from the central region to the uppermost region. In addition, the second array of the first transmit antenna unit 411a has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. In addition, the second array has a shape in which the upper and lower widths of the radiator decrease again from the central region to the uppermost region.

The second transmit antenna unit 412a includes a first array and a second array. In addition, the first array of the second transmit antenna unit 412a has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. Also, in the first array, the upper and lower widths of the radiator decrease again from the central region to the uppermost region. In addition, the second array of the second transmit antenna unit 412a has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. In addition, the second array has a shape in which the upper and lower widths of the radiator decrease again from the central region to the uppermost region.

The third transmit antenna unit 413a includes a first array and a second array. In addition, the first array of the third transmit antenna unit 413a has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. Also, in the first array, the upper and lower widths of the radiator decrease again from the central region to the uppermost region. In addition, the second array of the third transmit antenna unit 413a has a shape in which the upper and lower widths of the radiator gradually increase from the feeding point to the central region. In addition, the second array has a shape in which the upper and lower widths of the radiator decrease again from the central region to the uppermost region.

11 is a gain graph according to a combined operation of the transmit antenna units according to an embodiment of the present invention, and FIG. 12 is a gain graph according to an individual operation of each transmit antenna according to an embodiment of the present invention.

Referring to FIG. 11 , when the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 constituting the transmit antenna unit are simultaneously driven, 19.4618 dB in the 0 degree region It was confirmed that a radiation pattern of 7dB occurred in the region of -65.35 degrees, and a radiation pattern of 7dB was generated in the region of +65.28 degrees.

Also, referring to FIG. 12 , each of the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 may be driven independently. Accordingly, when a plurality of antenna units constituting the transmit antenna unit are driven independently, different radiation patterns may be implemented, and accordingly, the operation of the transmit antenna unit may be controlled according to the driving mode of the vehicle.

That is, when the first transmit antenna unit 411 is driven alone, the radiation pattern has 17.15 dB in the 0 degree region, 7 dB in the -38.30 degree region, and 7 dB in the 42.46 degree region.

And, when the second transmit antenna unit 412 is driven alone, the corresponding radiation pattern has 13.7945 dB in the 0 degree region, 7 dB in the -74.45 degree region, and 7 dB in the 74.47 degree region.

In addition, when the third transmit antenna unit 413 is driven alone, the radiation pattern has 17.1789 dB in the 0 degree region, 7 dB in the -42.70 degree region, and 7 dB in the 38.28 degree region.

13 to 17 are diagrams illustrating a connection configuration of a radar module in each operation mode according to an embodiment of the present invention.

Referring to FIG. 13 , in connection with the radar module, only the second transmit antenna unit 412 among the plurality of transmit antenna units may be connected to the communication element 430 , and accordingly, the second transmit antenna unit among the plurality of transmit antenna units may be connected to the radar module. Only the transmit antenna unit 412 may form a radiation pattern. This may operate in a low-speed driving mode of the vehicle, and may be performed, for example, when the vehicle is driving at an intersection, a congested road, or a sharp turn section. The transmit antenna element in this case operates as a short-range radar.

Referring to FIG. 14 , in connection with the radar module, only the first transmit antenna unit 411 among the plurality of transmit antenna units may be connected to the communication element 430 . Also, referring to FIG. 15 , only the third transmit antenna unit 413 among the plurality of transmit antenna units may be connected to the communication element 430 . Also, referring to FIG. 16 , a first transmit antenna unit 411 and a third transmit antenna unit 413 among the plurality of transmit antenna units may be connected to the communication element 430 together.

The transmit antenna element 410 in the connection structure of FIGS. 14 to 16 operates as an intermediate-range radar. This may operate when the vehicle is driving in the normal driving mode.

To this end, the communication element 430 may include a first channel connected to the first transmit antenna unit 411 among the three transmit channels, or a third channel connected to the third transmit antenna unit 413 , or the first Signals may be supplied to the first channel and the third channel connected to the transmit antenna unit 411 and the third transmit antenna unit 413 , and signals are not supplied to other channels.

Referring to FIG. 17 , the transmit antenna element radiates a radiation pattern according to the entire combination of the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 . This may be operated in a high-speed driving mode of the vehicle, and specifically, may be performed when the vehicle is traveling on a highway or an exclusive road for automobiles. The transmit antenna element 410 in this case operates as a long-range radar.

To this end, the communication element 430 supplies signals to all of the first transmit antenna unit 411 , the second transmit antenna unit 412 , and the third transmit antenna unit 413 connected to the three transmit channels, respectively. Accordingly, in the above case, all of the first to third transmitting antennas 11, 412, and 413) emit the signal for detecting the object.

Accordingly, in the third operation mode according to the transmission channel setting as described above, the first transmission antenna unit 411 , the second transmission antenna unit 412 , and the third transmission antenna unit 413 all operate, and accordingly The transmit antenna element 410 operates as a long-distance antenna. In this case, the transmit antenna element 410 is a wide-angle antenna is applied, it is possible to detect an object in a wide upper and lower range. Accordingly, it is possible to detect objects that exist at a distance of 160 m or more.

18 is a cross-sectional view showing a radome and a printed circuit board of the vehicle radar device according to the first embodiment of the present invention.

Referring to FIG. 18 , the radome 170 has a cover portion 171 disposed to face the printed circuit board 150 , an edge portion 173 for fastening with the case 110 , and an inner surface of the cover portion 171 . It may include a concave-convex portion 175 disposed at (177).

In addition, the communication element 430 is mounted on the printed circuit board 150 .

Preferably, the upper surface of the printed circuit board 150 is divided into a first area in which the communication element 430 is mounted, and a second area in which the transmit antenna element 410 and the receive antenna element 420 are mounted.

In addition, an electromagnetic wave shielding member 450 for shielding electromagnetic waves generated by the communication device 430 is disposed on an inner surface of the cover part 171 that vertically overlaps with the first area. Here, the electromagnetic wave shielding member 450 may be a shield can.

In addition, a concave-convex portion 175 is disposed on an inner surface of the cover portion 171 that vertically overlaps with the second area.

The cover part 171 may accommodate the printed circuit board 150 to protect the printed circuit board 150 , and the transmit antenna element 410 and the receive antenna element 420 mounted on the printed circuit board 150 . It is possible to pass the radio waves emitted from the radio wave and the radio waves received from the outside.

In the radome 170 , the printed circuit board 150 may be disposed in a space formed by a height difference between the cover part 171 and the edge part 173 . The transmit antenna element 410 and the receive antenna element 420 may be mounted on the printed circuit board 150 .

Referring to the enlarged view of the radome 170 and the printed circuit board 150, the height d1 of the cover portion 171 of the radome 170 and the height d2 of the edge portion 173 may be the same, but this is not limited to For example, the height d1 of the cover part 171 may be 1 mm or more and 2 mm or less, and the height d2 of the edge part 173 may be 1 mm or more and 2 mm or less, but is not limited thereto.

The concavo-convex portion 175 may include a plurality of concavities and convexities, and the concavo-convex shape may have a rectangular shape, but is not limited thereto. The period d3 between the plurality of irregularities may be 0.5 mm, but is not limited thereto.

The distance d4 between the inner surface 177 of the cover part 171 and the printed circuit board 150 may be 1 mm or more and 3 mm or less, and preferably, the distance d4 may be 2 mm.

The height d5 of the plurality of irregularities may be 0.5 mm or more and 0.75 mm or less, but is not limited thereto. However, the height d5 of the plurality of concavities and convexities greatly affects the implementation of a wide angle, and accordingly, when the height d5 is formed to be 0.5 mm or more and 0.75 mm or less, an optimal wide angle implementation is possible.

That is, the radome 170 of the vehicle radar device according to the embodiment of the present invention forms the concave-convex portion 175 on the inner surface 177 to suppress the propagation of radio waves in the surface direction due to diffuse reflection and increase the radio wave transmission in the vertical direction. can do it

On the other hand, the upper surface of the cover part 171 is formed to have a predetermined step difference, and accordingly, the inner surface of the cover part 171 is also formed to have a predetermined step difference.

That is, the inner surface of the cover part 171 may be divided into a first area in which the electromagnetic wave shielding member 450 is disposed and a second area in which the concavo-convex part 175 is disposed.

In this case, the second area of the cover part 171 is related to the distance d4, and the wide-angle implementation performance varies according to the location of the second area.

In this case, when the distance d4 is 2 mm as described above, optimal performance may be realized.

Meanwhile, in the first area of the cover part 171 , the electromagnetic wave shielding member 450 is disposed. In this case, the distance d6 between the first area of the cover part 171 and the printed circuit board 150 may be determined by the height of the communication elements 430 and 440 and the height of the electromagnetic wave shielding member 450 . can

In this case, the height of the communication element 430 is generally about 0.8 mm, and the height of the electromagnetic wave shielding member 450 is about 4.2 mm.

Accordingly, the distance d6 between the inner surface of the first area of the cover part 171 and the printed circuit board 150 may satisfy 4.2 mm.

In other words, the first area of the inner surface of the cover part 171 may be defined as an area for shielding electromagnetic waves, and the second area may be defined as an area for transmitting radio waves. Accordingly, the characteristics that each inner surface should have are different, and accordingly, the inner surface of the cover part 171 has a certain level difference.

Preferably, among the inner surfaces of the cover part 171 , an inner surface of the first area is higher than an inner surface of the second area.

19 is a plan view of the radome of the vehicle radar device according to the first embodiment of the present invention.

Referring to Figure 19, as a plan view showing the inner surface (177a) of the radome (170a), the radome (170a) is arranged in the second area of the inner surface (177a) in the rim portion (173a) uneven portion (175a) may include In this case, the concave-convex portion 175a is not formed in the first region of the inner surface 177a of the edge portion 173a, and thus has a flat surface to contact the electromagnetic wave shielding member 450 .

The interval d8 in the X-axis direction and the interval d7 in the Y-axis direction between the edge portion 173a and the inner surface 177a may be the same, but is not limited thereto. The interval d7 in the X-axis direction between the edge portion 173a and the inner surface 177a may be 5 mm or more and 7 mm or less, and the interval d6 in the Y-axis direction between the edge portion 173a and the inner surface 177a. ) may be 5mm or more and 7mm.

The concave-convex portion 175a of the radome according to the first embodiment may have a shape continuously extending in the longitudinal direction (eg, the Y-axis direction), and a plurality of irregularities may be disposed in the horizontal direction (eg, the X-axis direction). .

20 is a plan view of a radome of a vehicle radar device according to a second embodiment of the present invention. Referring to FIG. 18, as a plan view showing the inner surface 177b of the radome 170b, the radome 170b may include an uneven portion 175b disposed on the inner surface 177b in the rim portion 173b. have. The distance between the edge portion 173b and the inner surface 177b in the X-axis direction and the distance in the Y-axis direction may be the same, but is not limited thereto.

The concave-convex portion 175b of the radome according to the second embodiment has a shape discontinuously extending in the longitudinal direction (eg, the Y-axis direction), and a plurality of irregularities in the horizontal direction (eg, the X-axis direction) are zigzag (jig). -zag) form.

21 is a cross-sectional view illustrating a radome and a printed circuit board of a radar device for a vehicle according to a third embodiment of the present invention.

Referring to FIG. 21 , the radome 170c is a cover portion 171c disposed to face the printed circuit board 150 , an edge portion 173c to be fastened with the case 110 , and the inner surface of the cover portion 171c). It may include a concave-convex portion 175c disposed at the 177c.

Preferably, the upper surface of the printed circuit board 150 is divided into a first area in which the communication element 430 is mounted, and a second area in which the transmit antenna element 410 and the receive antenna element 420 are mounted.

In addition, an electromagnetic wave shielding member 450 for shielding electromagnetic waves generated by the communication device 430 is disposed on an inner surface of the cover portion 171c that vertically overlaps with the first area. Here, the electromagnetic wave shielding member 450 may be a shield can.

In addition, a concave-convex portion 175c is disposed on an inner surface of the cover portion 171c that vertically overlaps with the second area.

The cover portion 171c may accommodate the printed circuit board 150 to protect the printed circuit board 150 , and the transmit antenna element 410 and the receive antenna element 420 mounted on the printed circuit board 150 . It can pass the radio waves emitted from the radio wave and the radio wave received from the outside.

The radome 170c may have a printed circuit board 150 disposed in a space formed by a height difference between the cover portion 171c and the edge portion 173c.

The transmit antenna element 410 and the receive antenna element 420 may be mounted on the printed circuit board 150 .

The radome 170c according to the third embodiment includes at least one of a plurality of concavo-convex portions 175c in a region where the cover portion 171c and the transmit antenna element 410 and the receive antenna element 420 vertically overlap. may not That is, since the concavo-convex portion 175c is not disposed in the vertical direction of the transmission antenna element 410 and the reception antenna element 420 , the beam width can be widened by increasing radio wave transmission in the vertical direction.

Referring to the enlarged view of the radome 170c and the printed circuit board 150, the height of the cover portion 171c of the radome 170c and the height of the edge portion 173c may be the same, but the present invention is not limited thereto. The distance d10 between the edge portion 173c of the radome 170c and the transmit antenna element 410 may be 10 mm or less, but is not limited thereto.

The area in which the cover part 171c of the radome 170c according to the third embodiment and the area in which the transmit antenna element 410 and the receive antenna element 420 are disposed vertically overlap, for example, a region in which the concavo-convex portion is not formed. The width d9 may be 1 mm or more and 2.5 mm or less, but is not limited thereto.

On the other hand, the upper surface of the cover portion 171c is formed to have a predetermined step, and accordingly, the inner surface of the cover portion 171c is also formed to have a predetermined step difference.

That is, the inner surface of the cover portion 171c may be divided into a first area in which the electromagnetic wave shielding member 450 is disposed and a second area in which the concavo-convex portion 175c is disposed.

In this case, the second area of the cover part 171c is related to the distance d4, and the wide-angle implementation performance varies according to the location of the second area.

In this case, when the distance d4 is 2 mm as described above, optimal performance may be realized.

Meanwhile, the electromagnetic wave shielding member 450 is disposed in the first area of the cover part 171c. In this case, the distance d6 between the first area of the cover part 171c and the printed circuit board 150 may be determined by the height of the communication element 430 and the height of the electromagnetic wave shielding member 450 . .

In this case, the height of the communication element 430 is generally about 0.8 mm, and the height of the electromagnetic wave shielding member 450 is about 4.2 mm.

Accordingly, the distance d6 between the inner surface of the first area of the cover part 171c and the printed circuit board 150 may satisfy 4.2 mm.

In other words, the first area of the inner surface of the cover part 171c may be defined as an area for shielding electromagnetic waves, and the second area may be defined as an area for transmitting radio waves. Accordingly, the characteristics that each inner surface should have are different, and accordingly, the inner surface of the cover part 171 has a certain level difference.

Preferably, among the inner surfaces of the cover part 171c, an inner surface of the first area is higher than an inner surface of the second area.

22 is a plan view of a radome of a vehicle radar device according to a third embodiment of the present invention.

Referring to FIG. 22, as a plan view showing the inner surface 177c of the radome 170c, the radome 170c may include an uneven portion 175c disposed on the inner surface 177c within the rim portion 173c. have. The distance between the edge portion 173c and the inner surface 177c in the X-axis direction and the distance in the Y-axis direction may be the same, but is not limited thereto.

The concave-convex portion 175c of the radome according to the third embodiment may have a shape continuously extending in the vertical direction (eg, the Y-axis direction), and a plurality of may be disposed in the horizontal direction (eg, the X-axis direction).

The radome 170c may not include at least one of the plurality of concavo-convex portions 175c in a region where the cover portion 171c, the transmit antenna element 410, and the receive antenna element 420 vertically overlap.

23 is a plan view illustrating a vehicle radar device according to an embodiment of the present invention mounted on the rear side of the vehicle.

Referring to FIG. 23 , the vehicle radar device 100 may be respectively mounted on the rear side of the vehicle. For example, a plurality of antenna arrays of the vehicle radar device 100 may be arranged perpendicular to the X-axis direction, and radio waves may be radiated in the Z-axis direction.

When a wide-angle radar that provides a wide field of view (FOV) to the side and rear like the radar device 100 for a vehicle according to an embodiment is mounted on the side and rear of the vehicle, a blind spot formed on the side and rear of the vehicle is eliminated. It can be fully covered, which can help safe driving.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

24 is a flowchart for explaining step-by-step a method for controlling a vehicle radar device according to a first embodiment of the present invention, and FIG. 23 is a step-by-step diagram for explaining a control method for a vehicle radar device according to a second exemplary embodiment of the present invention is a flow chart for

Referring to FIG. 24 , the controller 440 acquires driving information of the vehicle by communicating with the outside (step 110). Here, the driving information of the vehicle may include speed information of the vehicle and location information of the vehicle. In addition, the location information of the vehicle may include road traffic situation information according to the current location of the vehicle.

Thereafter, the controller 440 checks the driving state of the vehicle by using the acquired driving information (step 120). That is, the controller 440 checks the current speed of the vehicle by using the driving information, and also checks the traffic condition information of the road on which the vehicle is currently traveling.

Then, the controller 440 selects a detection mode of the transmit antenna element 410 using the checked driving state of the vehicle (step 130). The sensing mode refers to an operation mode of the transmit antenna element.

Thereafter, the controller 440 selects a transmission channel to which a signal is to be supplied from among a plurality of transmission channels of the communication device 430 according to the selected mode (step 140).

Thereafter, the communication element 430 supplies a signal through the transmit antenna element 410 connected to the selected transmission channel among the plurality of transmission channels, and performs an object detection operation accordingly (step 150).

Referring to FIG. 25 , the controller 440 acquires driving information of the vehicle by communicating with the outside (step 210). Here, the driving information of the vehicle may include speed information of the vehicle and location information of the vehicle. In addition, the location information of the vehicle may include road traffic situation information according to the current location of the vehicle.

Thereafter, the controller 440 checks the driving state of the vehicle using the acquired driving information (step 220). That is, the controller 440 checks the current speed of the vehicle by using the driving information, and also checks the traffic condition information of the road on which the vehicle is currently traveling.

Then, the controller 440 selects a detection mode of the transmit antenna element 410 using the checked driving state of the vehicle (step 230). The sensing mode refers to the operation mode.

Thereafter, when the mode is selected, the controller 440 determines a phase and power to be input to each of the transmit antenna arrays connected to the plurality of transmit channels according to the selected mode (step 240).

Thereafter, the communication element 430 supplies the determined phase and power to each of the transmit antenna arrays according to the control signal of the controller (step 250).

In addition, the communication element 430 performs an object detection operation through a transmission antenna connected to each of the transmission channels (step 260).

According to the embodiment of the present invention, by integrating the communication element for transmission and the communication element for reception, which are previously separated into one communication element, the volume of the radar device can be minimized, and thus the product price can be lowered. .

In addition, according to an embodiment of the present invention, by implementing an optimized radar antenna beam pattern according to road driving conditions, it is possible to reduce the risk of a traffic accident due to improvement in blind spot improvement and target detection.

In addition, according to an embodiment of the present invention, the size of the radar module can be reduced by implementing the radar module, which was previously separated into a long-range antenna, a short-range antenna, and an intermediate-range antenna, into one integrated type, Accordingly, there is an effect of freedom in vehicle design and cost reduction.

In addition, in an embodiment of the present invention, by forming a plurality of transmit antenna arrays in a symmetrical structure, the same power and a signal of the same phase can be supplied to the plurality of transmit antenna arrays, and accordingly, between the plurality of transmit antenna arrays It can solve the signal imbalance problem that occurs.

In addition, according to the embodiment of the present invention, by removing the balun disposed on the signal line of the centrally disposed transmit antenna array among the plurality of transmit antenna arrays, the asymmetry of the signal line and the left and right asymmetry of the radiation pattern can be solved. , thereby improving the detection characteristics.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and variations should be interpreted as being included in the scope of the embodiments.

In the above, the embodiment has been mainly described, but this is only an example and does not limit the embodiment, and those of ordinary skill in the art to which the embodiment belongs are provided with several examples not illustrated above in the range that does not deviate from the essential characteristics of the embodiment. It can be seen that the transformation and application of branches are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the embodiments set forth in the appended claims.

Claims (12)

printed circuit board;
It includes a transmitting antenna element disposed on the printed circuit board,
The transmit antenna element,
It includes first to third transmission antenna units respectively connected to different transmission channels,
The first transmit antenna unit
first feeding point; a first feeding line extending from the first feeding point; and first radiators alternately disposed on both sides of the first feed line in different directions,
The second transmit antenna unit
second feeding point; a second feeding line extending from the second feeding point; and second radiators alternately disposed on both sides of the second feed line in different directions,
The third transmit antenna unit
third feed point; a third feeding line extending from the third feeding point; and third radiators alternately disposed on both sides of the third feed line in different directions,
The first transmit antenna unit and the third transmit antenna unit,
With the second transmit antenna unit interposed therebetween, the second transmit antenna unit has a mutually symmetric structure and is disposed on the left and right sides, respectively,
The first radiator of the first transmit antenna unit,
a 1-1 radiator disposed in a first direction on one side of the first feeding line spaced apart from the first feeding point by a first interval;
and a 1-2-th radiator arranged in a second direction different from the first direction on the other side of the first feed line spaced a second distance from the first-1-1 radiator;
The second radiator of the third transmit antenna unit,
a 3-1 radiator disposed in a third direction on the other side of the third feeding line spaced apart from the third feeding point by the first interval and having a symmetrical shape with the 1-1 radiator;
a 3-2 radiator disposed on one side of the third feed line spaced apart from the 3-1 radiator by the second interval in a fourth direction and having a symmetrical shape with the 1-2 radiator;
The third direction is a direction symmetrical to the first direction with respect to the second transmit antenna unit,
The fourth direction is a direction symmetrical to the second direction with respect to the second transmit antenna unit,
The first transmit antenna unit and the third transmit antenna unit are medium-range sensing antennas,
The second transmitting antenna unit is a radar module that is a short-range sensing antenna. delete The method of claim 1,
The first transmit antenna unit,
1-1 antenna array, and
and a 1-2-th antenna array having an asymmetric shape with the 1-1-th antenna array,
The third transmit antenna unit,
3-1 antenna array, and
and a 3-2 antenna array having an asymmetric shape with the 3-1 antenna array,
The 1-1 antenna array has a symmetrical shape with the 3-1 antenna array,
Wherein the 1-2 antenna array has a symmetrical shape with the 3-2 antenna array, a radar module. The method of claim 1,
a receiving antenna element disposed on the printed circuit board; and
A communication element connected to the transmit antenna element and the receive antenna element,
The first transmit antenna unit,
a first balun unit connected to a differential line of a first transmission channel of the communication element; and
The third transmit antenna unit,
and a second balun unit connected to a differential line of a third transmission channel of the communication element;
The first and second balloon portions include bent portions bent in different directions,
The bending direction of the first balloon part is,
A direction symmetrical to the bending direction of the second balun part with respect to the second transmitting antenna part,
A length of the first balun part is the same as a length of the second balun part. 5. The method of claim 4,
The feeding unit of the second transmission antenna unit is directly connected to a differential line of a second transmission channel of the communication element,
The differential line of the second transmission channel constitutes a part of a feed line of the second transmission antenna unit. The method of claim 1,
The second transmit antenna unit,
A 2-1 antenna array and a 2-2 antenna array having an asymmetric shape with the 2-1 antenna array,
The radiators of the 2-1 antenna array are disposed inclined at a first angle upward on the feed line,
The radar module in which the radiators of the 2-2 antenna array are inclined at the first angle in a downward direction on a feed line. delete delete delete delete delete delete

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