WO2021147666A1

WO2021147666A1 - Antenna and terminal device

Info

Publication number: WO2021147666A1
Application number: PCT/CN2021/070343
Authority: WO
Inventors: 孙乔; 李堃; 郭健; 呼延思雷
Original assignee: 荣耀终端有限公司
Priority date: 2020-01-21
Filing date: 2021-01-05
Publication date: 2021-07-29
Also published as: CN113224503A; CN113224503B

Abstract

Embodiments of the present application provide an antenna and a terminal device. The antenna comprises a decoupling element, a first radiator, and a second radiator; the decoupling element is located between the first radiator and the second radiator; the decoupling element, the first radiator, and the second radiator are not connected; the decoupling element is made of metal; the first radiator comprises a first feed point; when power is fed at the first feed point, the antenna generates first resonance and second resonance; the second radiator comprises a second feed point; when power is fed at the second feed point, the antenna generates third resonance and fourth resonance. Any two resonance points in the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, and the resonance point of the fourth resonance may be different.

Description

Antenna and terminal equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010069682.7, and the application name is "an antenna and terminal equipment" on January 21, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of wireless communication, and in particular to an antenna and terminal equipment.

Background technique

With the development of technology, the development trend of industrial design (ID) of terminal equipment is a large screen ratio and multiple cameras. This has resulted in a significant reduction in the antenna headroom in the terminal equipment, and the layout space is becoming more and more limited. At the same time, many new communication specifications have emerged, such as the sub-6GHz (sub-6G) frequency band in 5G, dual low frequency, etc., requiring more antennas in the terminal. Therefore, how to arrange more antennas in a limited space has become a very important research direction. In order to lay out more antennas in the same space, spatial multiplexing, multiplexing of antenna radiators, and new isolation solutions between antennas are several issues that we need to solve

At present, most commonly used spatial multiplexing multi-antenna schemes utilize the orthogonal characteristics of polarization to arrange two antennas with the same frequency in the same space. In this scheme, the isolation of the two antennas is generally very high, but in order to generate orthogonal polarization modes, it is usually necessary to perform differential feeding at the feed end, or to arrange the antennas in different planes. The realization method requires a large space and is difficult to apply to the design of terminal equipment.

Summary of the invention

The embodiments of the present application provide an antenna and a terminal device, which obtain broadband characteristics through spatial multiplexing, are easy to implement in the terminal device architecture, occupy a small area, and can meet the needs of current terminal devices.

In a first aspect, an antenna is provided, which is applied to a terminal device, and includes: a decoupling element, a first radiator and a second radiator, and the decoupling element is located between the first radiator and the second radiator. Wherein, the decoupling member, the first radiator and the second radiator are not connected, the decoupling member is metal; the decoupling member includes a first radiating arm and a second radiator Arm, the first radiator is arranged along the first radiating arm, the first radiator and the first radiating arm partially overlap in a first direction, and the second radiator is along the second radiating arm Provided, the second radiator and the second radiating arm partially overlap in a first direction; the first radiator includes a first feeding point, and the first feeding point is disposed on the first radiator One end; the second radiator includes a second feeding point, and the second feeding point is arranged at one end of the second radiator.

According to the technical solution of the embodiment of the present application, the decoupling member, the first radiator and the second radiator may not be connected, so as to obtain different current distributions. When feeding power at the first feeding point, the current is coupled to the decoupling element, and the current on the second radiator is relatively small. When feeding power at the second feeding point, the current is coupled to the decoupling element, and the current on the first radiator is relatively small. Therefore, the multiple radiators in the antenna have better isolation and lower envelope correlation coefficient in a close space, which meets the requirements of a multi-antenna system. The antenna provided in the embodiment of the present application may provide a technical reference for the antenna solution of the 5G terminal device. The antenna provided in the embodiments of the present application can be arranged on the printed circuit board of the terminal device, or on the frame of the terminal device, or implemented by using laser direct molding technology, flexible circuit board printing, or floating metal on the bracket.

It should be understood that, in the antenna structure, the decoupling member can be used as a radiator of the antenna, and can also be used as a decoupling structure between the first radiator and the second radiator. In the solution of the embodiment of the present application, the radiator and the decoupling structure are co-body to achieve self-decoupling characteristics, and high isolation of the antenna in the entire frequency band can be achieved without adding a decoupling structure, and at the same time, due to the radiator and the decoupling structure The common body structure of the coupling structure can also realize the miniaturization of the antenna.

Among them, the first resonance may correspond to the N77 (3.3GHz-4.2GHz) frequency band in the 5G frequency band, and the second resonance may correspond to the N79 (4.4GHz-5.0GHz) frequency band in the 5G frequency band. The third resonance can correspond to the N77 (3.3GHz-4.2GHz) frequency band in the 5G frequency band, and the fourth resonance can correspond to the N79 (4.4GHz-5.0GHz) frequency band in the 5G frequency band.

With reference to the first aspect, in some implementations of the first aspect, when the first feeding point is fed, the antenna generates a first resonance and a second resonance; and the antenna is fed at the second feeding point At this time, the antenna generates a third resonance and a fourth resonance.

It should be understood that any two resonance points of the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, and the resonance point of the fourth resonance may be different.

With reference to the first aspect, in some implementations of the first aspect, the decoupling element includes a ground point, and the decoupling element is grounded at the ground point.

It should be understood that the decoupling element may include a ground point or a third feeding point, so that different resonance modes can be provided, and the antenna can obtain more operating frequency points.

With reference to the first aspect, in some implementations of the first aspect, the decoupling element is grounded at the grounding point through at least one of a concentrated capacitor, a lumped inductance, a coupling capacitor, a distributed capacitor, or a distributed inductance. .

According to the technical solution of the embodiment of the present application, the antenna can be grounded through a capacitor, an inductance or a matching network, so as to obtain better antenna performance.

With reference to the first aspect, in some implementations of the first aspect, the decoupling element includes a third feeding point, and the third feeding point is disposed at one end of the decoupling element.

With reference to the first aspect, in some implementations of the first aspect, when the third feeding point is fed, the antenna generates a fifth resonance and a sixth resonance; Any two resonance points of the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance Not the same.

According to the technical solution of the embodiment of the present application, when feeding at the third feeding point, the antenna can also generate the fifth resonance and the sixth resonance, and multiplex the first radiator and the second radiator in the antenna. The fifth resonance and the sixth resonance may correspond to the WiFi frequency band. Among them, the fifth resonance may correspond to the 2.4GHz (2.4GHz-2.4835GHz) frequency band, and the sixth resonance may correspond to the 5GHz (5.15GHz-5.825GHz) frequency band.

With reference to the first aspect, in some implementations of the first aspect, a first matching network is provided at the first feeding point, a second matching network is provided at the second feeding point, and A third matching network is arranged at the three feeding points, and the first matching network, the second matching network and the third matching network are used for matching the fifth resonance and the sixth resonance.

According to the technical solution of the embodiment of the present application, the working frequency band supported by the antenna when feeding at the third feeding point is different from the working frequency band supported by the antenna when feeding at the first feeding point or the second feeding point. , The isolation of the antenna needs to be optimized by setting up a matching network at the first feeding point, the second feeding point and the third feeding point.

With reference to the first aspect, in some implementations of the first aspect, the frequency of the resonance point of the first resonance is less than the frequency of the resonance point of the second resonance, and the frequency of the resonance point of the third resonance is less than the frequency of the resonance point of the third resonance. The frequency of the resonance point of the fourth resonance; the length of the decoupling element is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance or one quarter of the wavelength corresponding to the resonance point of the third resonance; The length of the decoupling member is less than one half of the wavelength corresponding to the resonance point of the first resonance or one half of the wavelength corresponding to the resonance point of the third resonance.

Optionally, the decoupling member may be a T-shaped structure, and its length may refer to the distance between the two open ends, that is, the length of the first radiating arm may be greater than one-eighth of the wavelength corresponding to the resonance point of the first resonance or The resonance point of the third resonance corresponds to one-eighth of the wavelength and is smaller than one-quarter of the wavelength corresponding to the resonance point of the first resonance or one-fourth of the wavelength corresponding to the resonance point of the third resonance. The length of the second radiating arm can be greater than one-eighth of the wavelength corresponding to the resonance point of the first resonance or one-eighth of the wavelength corresponding to the resonance point of the third resonance, and less than a quarter of the wavelength corresponding to the resonance point of the first resonance The resonance point of the first or third resonance corresponds to a quarter of the wavelength. The length can be obtained according to the design or actual simulation results.

According to the technical solution of the embodiment of the present application, the positions of the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, and the resonance point of the fourth resonance can be adjusted by changing the length of the decoupling member.

With reference to the first aspect, in some implementations of the first aspect, the length of the first radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the second resonance.

Optionally, the first radiator may be a broken line structure, and its length may refer to the distance between the first feeding point and the open end. The length can be obtained according to the design or actual simulation results.

According to the technical solution of the embodiment of the present application, the position of the resonance point of the second resonance can be adjusted by changing the length of the first radiator.

With reference to the first aspect, in some implementations of the first aspect, the length of the second radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the fourth resonance.

Optionally, the second radiator may be a broken line structure, and its length may refer to the distance between the second feeding point and the open end. The length can be obtained according to the design or actual simulation results.

According to the technical solution of the embodiment of the present application, the position of the resonance point of the fourth resonance can be adjusted by changing the length of the second radiator.

In a second aspect, a terminal device is provided, including: at least one antenna; the at least one antenna includes: a decoupling element, a first radiator and a second radiator, the decoupling element is located in the first radiator And the second radiator; wherein, the decoupling member, the first radiator and the second radiator are not connected, the decoupling member is metal; the decoupling member includes a first The radiating arm and the second radiating arm, the first radiator is arranged along the first radiating arm, the first radiator and the first radiating arm partially overlap in a first direction, and the second radiator is arranged along the The second radiating arm is arranged, and the second radiator and the second radiating arm partially overlap in a first direction; the first radiator includes a first feeding point, and the first feeding point is arranged at One end of the first radiator; the second radiator includes a second feeding point, and the second feeding point is arranged at one end of the second radiator.

With reference to the second aspect, in some implementations of the second aspect, when the first feeding point is fed, the at least one antenna generates a first resonance and a second resonance; at the second feeding point When feeding power, the at least one antenna generates a third resonance and a fourth resonance.

With reference to the second aspect, in some implementations of the second aspect, the decoupling element includes a ground point, and the decoupling element is grounded at the ground point.

With reference to the second aspect, in some implementations of the second aspect, the decoupling element is grounded at the grounding point through at least one of a concentrated capacitor, a lumped inductance, a coupling capacitor, a distributed capacitor, or a distributed inductance. .

With reference to the second aspect, in some implementations of the second aspect, the decoupling element includes a third feeding point, and the third feeding point is disposed at one end of the decoupling element.

With reference to the second aspect, in some implementations of the second aspect, when the third feeding point is fed, the at least one antenna generates a fifth resonance and a sixth resonance; and the resonance of the first resonance Point, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance. The resonance points are not the same.

With reference to the second aspect, in some implementations of the second aspect, a first matching network is provided at the first feeding point, a second matching network is provided at the second feeding point, and A third matching network is arranged at the three feeding points, and the first matching network, the second matching network and the third matching network are used for matching the fifth resonance and the sixth resonance.

With reference to the second aspect, in some implementations of the second aspect, the frequency of the resonance point of the first resonance is less than the frequency of the resonance point of the second resonance, and the frequency of the resonance point of the third resonance is less than the frequency of the resonance point of the third resonance. The frequency of the resonance point of the fourth resonance; the length of the decoupling element is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance or one quarter of the wavelength corresponding to the resonance point of the third resonance; The length of the decoupling member is less than one half of the wavelength corresponding to the resonance point of the first resonance or one half of the wavelength corresponding to the resonance point of the third resonance.

With reference to the second aspect, in some implementations of the second aspect, the length of the first radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the second resonance.

With reference to the second aspect, in some implementations of the second aspect, the length of the second radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the fourth resonance.

With reference to the second aspect, in some implementations of the second aspect, the terminal device further includes a printed circuit board PCB; wherein the decoupling member is located on the surface of the PCB, and the first radiator and the second The second radiator is located inside the PCB.

In a third aspect, an antenna is provided, the antenna includes: a decoupling member, a first radiator and a second radiator, the decoupling member is located between the first radiator and the second radiator Wherein, the decoupling member, the first radiator and the second radiator are not connected, the decoupling member is metal; the decoupling member includes a first radiating arm and a second radiating arm, so The first radiator is arranged along the first radiating arm, the first radiator and the first radiating arm partially overlap in a first direction, and the second radiator is arranged along the second radiating arm, so The second radiator and the second radiating arm partially overlap in a first direction; the first radiator includes a first feeding point, and the first feeding point is disposed at one end of the first radiator; The second radiator includes a second feeding point, the second feeding point is arranged at one end of the second radiator; when the first feeding point is fed, the antenna generates a first resonance and a second Two resonance; when the second feeding point is fed, the antenna generates a third resonance and a fourth resonance; the frequency of the resonance point of the first resonance is less than the frequency of the resonance point of the second resonance, so The frequency of the resonance point of the third resonance is smaller than the frequency of the resonance point of the fourth resonance; the decoupling element includes a ground point, and the decoupling element passes through a concentrated capacitor, a lumped inductance, and a coupling capacitor at the ground point, At least one of the distributed capacitor or the distributed inductance is grounded; the length of the decoupling element is greater than a quarter of the wavelength corresponding to the resonance point of the first resonance or the wavelength corresponding to the resonance point of the third resonance A quarter; the length of the decoupling member is less than one-half of the wavelength corresponding to the resonance point of the first resonance or one-half of the wavelength corresponding to the resonance point of the third resonance; the first radiation The length of the body is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the second resonance; the length of the second radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the fourth resonance.

In a fourth aspect, an antenna is provided, the antenna includes: a decoupling member, a first radiator and a second radiator, the decoupling member is located between the first radiator and the second radiator Wherein, the decoupling member, the first radiator and the second radiator are not connected, the decoupling member is metal; the decoupling member includes a first radiating arm and a second radiating arm, so The first radiator is arranged along the first radiating arm, the first radiator and the first radiating arm partially overlap in a first direction, and the second radiator is arranged along the second radiating arm, so The second radiator and the second radiating arm partially overlap in a first direction; the first radiator includes a first feeding point, and the first feeding point is disposed at one end of the first radiator; The second radiator includes a second feeding point, the second feeding point is arranged at one end of the second radiator; when the first feeding point is fed, the antenna generates a first resonance and a second Two resonance; when the second feeding point is fed, the antenna generates a third resonance and a fourth resonance; the decoupling element includes a third feeding point, the third feeding point is arranged at the At one end of the decoupling piece, when the third feeding point is fed, the antenna generates the fifth resonance and the sixth resonance; a first matching network is set at the first feeding point, and the second feeding point A second matching network is set at the electrical point, a third matching network is set at the third feeding point, the first matching network, the second matching network and the third matching network are used for matching the first matching network. The fifth resonance and the sixth resonance are matched; the frequency of the resonance point of the first resonance is less than the frequency of the resonance point of the second resonance, and the frequency of the resonance point of the third resonance is less than that of the fourth resonance The frequency of the resonance point; the length of the decoupling element is greater than a quarter of the wavelength corresponding to the resonance point of the first resonance or one quarter of the wavelength corresponding to the resonance point of the third resonance; the decoupling element The length of the first resonance point is less than one-half of the wavelength corresponding to the resonance point or one-half of the wavelength corresponding to the third resonance point; the length of the first radiator is greater than or equal to the second The resonance point of the resonance corresponds to a quarter of the wavelength; the length of the second radiator is greater than or equal to a quarter of the wavelength of the resonance point of the fourth resonance.

Wherein, the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the first resonance Any two resonance points of the six resonance points may be different.

Description of the drawings

Fig. 1 is a schematic diagram of a terminal device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of a three-dimensional structure of an antenna in a terminal device provided by an embodiment of the present application.

FIG. 3 is a schematic diagram of a planar structure of an antenna in a terminal device provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of S parameters of an antenna provided in an embodiment of the present application.

FIG. 5 is a schematic diagram of the simulation result of the ECC of the antenna provided by the embodiment of the present application.

FIG. 6 is a schematic diagram of the simulation efficiency of the first feeding point provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of the simulation efficiency of the second feeding point provided by an embodiment of the present application.

FIG. 8 is a schematic diagram of current distribution when the antenna provided by an embodiment of the present application generates a first resonance.

FIG. 9 is a schematic diagram of current distribution when the antenna provided in an embodiment of the present application generates a second resonance.

FIG. 10 is a schematic diagram of current distribution when the antenna provided by an embodiment of the present application generates a third resonance.

FIG. 11 is a schematic diagram of current distribution when the antenna provided in an embodiment of the present application generates a third resonance.

Fig. 12 is a schematic diagram of a matching network for grounding provided by an embodiment of the present application.

FIG. 13 is a schematic diagram of S parameters of an antenna provided by an embodiment of the present application.

FIG. 14 is a schematic diagram of current distribution when the antenna provided by an embodiment of the present application generates a fifth resonance.

FIG. 15 is a schematic diagram of current distribution when the antenna provided in an embodiment of the present application generates a sixth resonance.

FIG. 16 is a schematic diagram of a matching network provided by an embodiment of the present application.

FIG. 17 is a schematic structural diagram of an antenna feeding solution provided by an embodiment of the present application.

FIG. 18 is a schematic structural diagram of an antenna in a terminal device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a smart watch, a smart helmet, a smart glasses, and the like. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and wireless communication. Functional handheld devices, computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, terminal devices in 5G networks, or terminal devices in public land mobile networks (PLMN) that will evolve in the future. The application embodiment does not limit this.

FIG. 1 is a schematic diagram of a terminal device provided by an embodiment of the present application. Here, the terminal device is a mobile phone for description.

As shown in Figure 1, the terminal device has a cube-like shape and can include a frame 10 and a display screen 20. Both the frame 10 and the display screen 20 can be installed on the middle frame (not shown in the figure), and the frame 10 can be divided into upper frames. The frame, the bottom frame, the left frame, and the right frame are connected to each other, and a certain arc or chamfer can be formed at the joint.

The terminal equipment also includes a printed circuit board (PCB) installed inside. Electronic components can be installed on the PCB. The electronic components can include capacitors, inductors, resistors, processors, cameras, flashlights, microphones, batteries, etc., but not Limited to this.

The frame 10 may be a metal frame, such as metals such as copper, magnesium alloy, stainless steel, etc., or a plastic frame, a glass frame, a ceramic frame, etc., or a frame that combines metal and plastic.

As the current terminal equipment pursues miniaturization, especially the higher requirements for thickness, this has caused the antenna headroom in the terminal equipment to be greatly reduced, and the layout space is becoming more and more limited. At the same time, many new communication specifications have emerged, such as the sub-6G frequency band in 5G, dual low frequency, etc., requiring more antennas in the terminal.

The present application provides a broadband multi-antenna solution in multiplexing space, which is easy to implement under the architecture of a terminal device and occupies a small area. Among them, multiple antennas have better isolation and lower envelope correlation coefficient (ECC) in a relatively close space to meet the needs of multi-antenna systems and provide antenna solutions for 5G terminal equipment. A technical reference.

Figures 2 and 3 are schematic diagrams of the structure of the terminal device provided by the embodiment of the present application. Figure 2 is a schematic diagram of the three-dimensional structure of the antenna 100 in the terminal device provided by the embodiment of the present application, and Figure 3 is the terminal provided by the embodiment of the present application. A schematic diagram of the planar structure of the antenna 100 in the device.

It should be understood that the antenna provided by the embodiment of the present application can be arranged on the PCB140 of the terminal device, or on the frame of the terminal device, or by adopting laser-direct-structuring (LDS) and flexible circuit technology on the bracket. FPC (flexible printed circuit, FPC) printing or floating metal (floating metal, FLM), etc., the embodiment of this application is for convenience of explanation, only the antenna is provided on the PCB 140 as an example, but does not limit the antenna provided in this application The set position.

As shown in FIG. 2, the antenna may include a decoupling member 110, a first radiator 120 and a second radiator 130, where the decoupling member 110 may include a first radiating arm 150 and a second radiating arm 160. The decoupling member 110 may be located between the first radiator 120 and the second radiator 130, and the decoupling member 110 is not connected between the first radiator 120 and the second radiator 130, and the decoupling member 110 may be a metal material .

The first radiator 120 may be disposed along the first radiating arm 150, and the first radiator 120 and the first radiating arm 150 partially overlap in the first direction. The second radiator 130 is arranged along the second radiating arm 160, and the second radiator 130 and the second radiating arm 160 partially overlap in the first direction.

Optionally, the first direction may be a direction perpendicular to the first radiating arm 150 or the second radiator 160. It should be understood that perpendicular may mean that it is approximately 90° to the first radiating arm 150 or the second radiator 160. The first direction may also be the length or width direction of the PCB 140.

As shown in FIG. 3, the decoupling member 110, the first radiator 120 and the second radiator 130 may be arranged above the PCB 140 through a support structure, or may be arranged on the surface or inside of the PCB 140 through technologies such as LDS. The antenna 100 can be fixed at a certain distance from the PCB 140 through a bracket structure. The greater the distance between the antenna 100 and the PCB 140, the wider its bandwidth. The antenna 100 can be electrically connected to the feed unit or the reference ground on the PCB 140 through coupling or metal springs, that is, the antenna and the feed unit are not on the same plane, as shown in the side view in FIG. 3.

The first radiator 120 may include a first feeding point 1201, and the first feeding point 1201 may be disposed at one end of the first radiator 120. When the feeding unit of the terminal device feeds 1201 at the first feeding point, the antenna 100 can generate a first resonance and a second resonance, wherein the frequency of the resonance point of the first resonance is smaller than the frequency of the resonance point of the second resonance. It should be understood that the specific position of the first feeding point 1201 may be obtained through simulation.

Optionally, the first resonance may correspond to the N77 (3.3GHz-4.2GHz) frequency band in the 5G frequency band, and the second resonance may correspond to the N79 (4.4GHz-5.0GHz) frequency band in the 5G frequency band.

The second radiator 130 may include a second feeding point 1301, and the second feeding point 1301 may be disposed at one end of the second radiator 130. When the feeding unit of the terminal device feeds power 1301 at the second feeding point, the antenna 100 may generate a third resonance and a fourth resonance, wherein the frequency of the resonance point of the third resonance is smaller than the frequency of the resonance point of the fourth resonance. It should be understood that the specific location of the second feeding point 1301 may be obtained through simulation.

Optionally, the third resonance may correspond to the N77 (3.3GHz-4.2GHz) frequency band in the 5G frequency band, and the fourth resonance may correspond to the N79 (4.4GHz-5.0GHz) frequency band in the 5G frequency band.

Optionally, the PCB 140 may include a substrate 1401 and a metal ground 1402. The metal ground 1402 may cover the surface of the substrate 1401, and the metal ground 1402 may provide a reference ground for the antenna 100.

Optionally, the decoupling element 110 may include a ground point 1101, and the decoupling element 110 may be electrically connected to a metal ground 1402 or a reference ground in the PCB 140 at the ground point 1101 to achieve grounding.

Optionally, the ground point 1101 may be located between the first feeding point 1201 and the second feeding point 1301.

It should be understood that any two resonance points of the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, and the resonance point of the fourth resonance may be different, that is, in the technical solution of the embodiment of the present application The antenna 100 includes two feeding points, which can generate four different resonance modes, which can be the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, and the resonance point of the fourth resonance. Not the same.

Optionally, the first radiating arm 150 and the second radiating arm 160 of the decoupling element 110 may be 180°, that is, the decoupling element 110 may have a T-shaped structure. The first radiating arm 150 and the second radiating arm 160 of the decoupling member 110 may also have other angles. The overlapping area of the first radiator 120 and the first radiating arm 150 in the first direction or the overlapping area of the second radiator 130 and the second radiating arm 160 in the first direction can be adjusted to adjust the decoupling member 110 and the first direction. The coupling of a radiator 120 and a second radiator 130. Alternatively, the coupling between the decoupling member 110 and the first radiator 120 and the second radiator 130 can also be adjusted by adjusting the distance between the decoupling member 110 and the first radiator 120 and the second radiator 130.

Optionally, both the first radiator 120 and the second radiator 130 may have a zigzag structure, and a groove structure is formed between the first radiator 120 and the second radiator 130 and the decoupling member 110, which can enhance the first radiation The isolation between the body 120 and the second radiator 130.

FIG. 4 is a schematic diagram of S parameters of the antenna 100 provided by an embodiment of the present application.

The antenna 100 provided in the embodiment of the present application may include two feeding points, namely, a first feeding point 1201 and a second feeding point 1301. The antenna 100 may further include three radiators, namely, a decoupling member 110, a first radiator 120, and a second radiator 130.

As shown in Figure 4, when the first feeding point 1201 and the second feeding point 1301 are feeding, the working frequency band of the antenna can both cover the 3300MHz-5000MHz frequency band, that is, it supports the N77 frequency band and the N79 frequency band. The worst isolation between the first feeding point 1201 and the second feeding point 1301 is about -10dB, and the isolation between the first feeding point 1201 and the second feeding point 1301 in the full frequency band of the N77 and N79 frequency bands is less than- 10dB.

FIG. 5 is a schematic diagram of the simulation result of the ECC between the first feeding point and the second feeding point provided by an embodiment of the present application.

As shown in Fig. 5, in the working frequency band of the antenna, the ECC between the first feeding point and the second feeding point is low, which meets actual needs.

6 and 7 are the simulation efficiency of the first feeding point 1201 and the second feeding point 1301 respectively. As shown in FIG. 5 and FIG. 6, the antenna provided by the embodiment of the present application operates in the full frequency band of the N77 frequency band and the N79 frequency band The internal efficiency is relatively high, and there is no efficiency depression, which meets actual needs.

8 to 11 are schematic diagrams of current distribution of antennas provided by embodiments of the present application. Among them, Fig. 8 is the current distribution diagram when the feeding unit is fed at the first feeding point 1201 and the first resonance occurs; Fig. 9 is the current distribution diagram when the feeding unit is feeding at the first feeding point 1201 and the second resonance occurs Current distribution diagram; Figure 10 is the current distribution diagram when the feeding unit feeds at the second feeding point 1301 and generates the third resonance; Figure 11 is the current distribution diagram when the feeding unit feeds at the second feeding point 1301 and generates the third resonance Current distribution diagram at time.

As shown in FIG. 8, it is a current distribution diagram when power is fed at the first feeding point 1201 and the first resonance occurs. Wherein, the first feeding point 1201 and the first open end 1202 are respectively located at two ends of the first radiator 120. When the first resonance occurs, the current path is from the first feeding point 1201 along the surface of the first radiator 120 to the first open end 1202, and the second open end 1102 coupled to the decoupling element 110 to the ground point. The resonance is a common-mode (CM) mode.

As shown in FIG. 9, it is a current distribution diagram of feeding at the first feeding point 1201 to produce the second resonance. When the second resonance occurs, the current path is from the first feeding point 1201 along the surface of the first radiator 120 to the first open end 1202, and the second open end 1102 coupled to the decoupling element 110 to the ground point. The resonance is a differential-mode (DM) mode.

As shown in FIG. 10, it is a current distribution diagram of feeding at the second feeding point 1301 to produce the third resonance. Wherein, the second feeding point 1301 and the third open end 1302 are respectively located at two ends of the second radiator 130. When the third resonance occurs, the current path is from the second feeding point 1301 along the surface of the second radiator 130 to the third open end 1302, through the fourth open end 1103 coupled to the decoupling element 110 to the ground point, and the third The resonance is CM mode.

As shown in FIG. 11, it is a current distribution diagram of feeding at the second feeding point 1301 to produce the third resonance. When the fourth resonance occurs, the current path is from the second feeding point 1301 along the surface of the second radiator 130 to the third open end 1302, through the fourth open end 1103 coupled to the decoupling element 110 to the ground point, and the fourth The resonance is DM mode.

It should be understood that when feeding power at the first feeding point 1201, the fourth open end 1103 of the decoupling element 110 and the third open end 1302 of the second radiator are along the surface of the second radiator to the second feeding point 1301. The path is similar to the neutralization line structure. Due to this type of structure, the current coupling the first feeding point 1201 to the second feeding point 1301 is reduced.

When feeding power at the second feeding point 1301, the second open end 1102 of the decoupling element 110 is similar to the first open end 1202 of the first radiator along the first radiator surface to the first feeding point 1201. In the structure of the neutral line. Due to this type of structure, the current coupling the second feeding point 1301 to the first feeding point 1201 is reduced.

The difference between the decoupling element 110 provided in the embodiment of the present application and the traditional neutralization line structure is that the decoupling element 110 is not directly connected to the first radiator and the second radiator. Since the decoupling element 110 is not directly connected to the first radiator and the second radiator, the working modes of the first radiator or the second radiator are different when the first radiator or the second radiator generate different resonances, so that the first radiator in the antenna The isolation between the feeding point and the second feeding point is better.

In the antenna provided by the embodiment of the present application, when the first feeding point is fed, the first radiating arm close to the first radiator by the first radiator and the decoupling element is used as the main radiating unit. During power feeding, the second radiator and the second radiator arm close to the second radiator by the second radiator and the decoupling member are used as the main radiating unit. At the same time, the decoupling element also plays a role in reducing the coupling current between the first feeding point and the second feeding point. It should be understood that the decoupling element 110 may be used as a radiator of the antenna, and at the same time, may also be used as a decoupling structure between the first radiator 120 and the second radiator 130. In the solution of the embodiment of the present application, the radiator and the decoupling structure are co-body to achieve self-decoupling characteristics, and high isolation of the antenna in the entire frequency band can be achieved without adding a decoupling structure. At the same time, due to the radiator and decoupling structure The common body structure of the coupling structure can also realize the miniaturization of the antenna.

Due to the miniaturization characteristics of the antenna provided in the embodiments of the present application, it can be installed in multiple positions of the terminal device, for example, the edge of the PCB 140 or the metal frame, so as to meet the requirements of the multi-antenna system of the terminal device.

Optionally, the length of the decoupling element 110 of the T-shaped structure is greater than a quarter of the wavelength corresponding to the resonance point of the first resonance or one quarter of the wavelength corresponding to the resonance point of the third resonance, and is smaller than the resonance of the first resonance. The point corresponds to one-half of the wavelength or the resonance point of the third resonance corresponds to one-half of the wavelength. The length of the decoupling member 110 of the T-shaped structure may refer to the distance between the second open circuit end 1102 and the fourth open circuit end 1103 of the decoupling member 110. That is, the length of the first radiating arm can be greater than one-eighth of the wavelength corresponding to the resonance point of the first resonance or one-eighth of the wavelength corresponding to the resonance point of the third resonance, and less than a quarter of the wavelength corresponding to the resonance point of the first resonance. The resonance point of one or third resonance corresponds to a quarter of the wavelength. The length of the second radiating arm can be greater than one-eighth of the wavelength corresponding to the resonance point of the first resonance or one-eighth of the wavelength corresponding to the resonance point of the third resonance, and less than a quarter of the wavelength corresponding to the resonance point of the first resonance The resonance point of the first or third resonance corresponds to a quarter of the wavelength.

Optionally, the length of the first radiator 120 is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the second resonance. The length of the first radiator 120 may refer to the distance between the first feeding point and the first open end 1202 along the surface of the first radiator 120.

Optionally, the length of the second radiator 130 is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the fourth resonance. The length of the second radiator 130 may refer to the distance between the second feeding point and the fourth open end 1302 along the surface of the second radiator 130.

It should be understood that the length of the decoupling element 110, the length of the first radiator 120 and the length of the second radiator 130 can be obtained by actual simulation.

Optionally, the antenna may also include a matching network for grounding.

FIG. 12 is a schematic diagram of a matching network 200 for grounding provided by an embodiment of the present application.

As shown in FIG. 12, when the decoupling element 110 is grounded, a matching network 200 may be provided between the ground point of the decoupling element 110 and the reference ground.

The matching network can match the characteristics of the electrical signal in the feed unit with the characteristics of the radiator, and minimize the transmission loss and distortion of the electrical signal.

The matching network 200 may include a capacitor 2102, an inductor 2103, and a capacitor 2104. The inductor 2103 is connected in series between the reference ground and the decoupling element 110, the capacitor 2102 is connected to the ground in parallel between the reference ground and the inductor 2103, and the capacitor 2104 is connected to the ground between the inductor 2103 and the decoupling element 110. The specific values of the capacitor 2102, the inductance 2103, and the capacitor 2104 can be obtained by calculation and simulation.

Optionally, in order to simplify the matching network 200, in some cases, at least one of a lumped capacitor, a lumped inductor, a coupling capacitor, a distributed capacitor, or a distributed inductor may also be used to implement the grounding of the decoupling element.

It should be understood that a matching network can be added between the feeding unit and the first feeding point of the first radiator or between the feeding unit and the second feeding point of the second radiator, and the embodiment of the present application only provides An exemplary matching network is presented, and the specific form of the matching network is not limited.

Optionally, the decoupling element 110 may further include a third feeding point 1101, that is, the 1101 in the figure may be used as a grounding point or a feeding point.

Optionally, when the feeding unit of the terminal device feeds 1101 at the third feeding point, the antenna 100 may generate the fifth resonance and the sixth resonance, wherein the frequency of the resonance point of the fifth resonance is smaller than the resonance point of the sixth resonance Frequency of.

Optionally, the fifth resonance and the sixth resonance may correspond to WiFi frequency bands. Among them, the fifth resonance may correspond to the 2.4GHz (2.4GHz-2.4835GHz) frequency band, and the sixth resonance may correspond to the 5GHz (5.15GHz-5.825GHz) frequency band.

It should be understood that any two resonance points of the first resonance, the second resonance, the third resonance, the fourth resonance, the fifth resonance, and the sixth resonance are different, that is, in the technical solution of the present application, the antenna includes four feeders. The unit point can generate six different resonance modes, which can be the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and The resonance points of the sixth resonance are all different.

FIG. 13 is a schematic diagram of S parameters of the antenna 100 provided in the embodiment of the present application when the decoupling element 110 includes the third feeding point 1101.

The antenna 100 provided in the embodiment of the present application may include three feeding points, namely, a first feeding point 1201, a second feeding point 1301, and a third feeding point 1101.

Optionally, the third feeding point 1101 may be located between the first feeding point 1201 and the second feeding point 1301.

As shown in Figure 13, when the first feeding point 1201 and the second feeding point 1301 are feeding, the working frequency band of the antenna can both cover the 3300MHz-5000MHz frequency band, that is, it supports the N77 frequency band and the N79 frequency band. When the third feeding point 1101 performs power feeding, the working frequency band of the antenna can both cover the 2400MHz-2500MHz frequency band and the 5150MHz-5825MHz frequency band, that is, it supports the WiFi frequency band. At the same time, the isolation between each feeding point can also meet actual needs.

14 and 15 are schematic diagrams of current distribution of antennas provided by embodiments of the present application. Among them, Fig. 14 is the current distribution diagram when the feeding unit feeds at the third feeding point 1101 and the fifth resonance occurs; Fig. 15 is the current distribution diagram when the feeding unit feeds at the third feeding point 1101 and the sixth resonance occurs Current distribution diagram.

As shown in FIG. 14, it is a current distribution diagram of feeding at the third feeding point 1101 to produce the fifth resonance. When the fifth resonance occurs, the current path is from the second open end 1102 to the fourth open end 1103, and the fifth resonance is in the CM mode.

As shown in FIG. 15, it is a current distribution diagram of feeding at the third feeding point 1101 to produce the sixth resonance. When the sixth resonance is generated, its current path is from the third feeding point 1101 to the fourth open end 1103, and coupled to the surface of the second radiator, the sixth resonance is a three-quarter wavelength mode. As shown in Fig. 15, there is a current zero point 1104 in the circuit distribution.

It should be understood that when the antenna works at the first resonance, the second resonance, the third resonance, or the fourth resonance, its working principle is as shown in FIG. 8 to FIG. 11. However, since the working frequency band supported by the antenna when feeding at the third feeding point is different from the working frequency band supported by the antenna when feeding at the first feeding point or the second feeding point, the isolation of the antenna needs to be passed The first feeding point, the second feeding point and the third feeding point are optimized by setting up a matching network.

Optionally, a first matching network 300 may be set at the first feeding point 1201, a second matching network 400 may be set at the second feeding point 1301, and a third matching network 500 may be set at the third feeding point 1101. Wherein, the first matching network 300, the second matching network 400 and the third matching network 500 are used for matching the fifth resonance and the sixth resonance.

It should be understood that adding matching with the feeding unit at each feeding point can suppress the current in the WiFi frequency band of the first feeding point and the second feeding point, and increase the overall performance of the antenna.

Optionally, the first feeding network 300 may include an inductor 301, a capacitor 302, and an inductor 304 connected in series in sequence. The inductor 301 is electrically connected to the first radiator at the first feeding point 1201, and the inductor 304 is electrically connected to the feeding unit. The first feed network also includes a capacitor 303 connected in parallel between the capacitor 302 and the inductor 304 to be grounded.

Optionally, the inductance value of the inductor 301 may be 3.2 nH, the capacitance value of the capacitor 302 may be 1 pF, the capacitance value of the capacitor 303 may be 0.5 pF, and the inductance value of the inductor 304 may be 1 nH.

It should be understood that the inductor 301 can be used to eliminate the resonance of WiFi in the 5 GHz frequency band.

Optionally, the second feed network 400 may include a capacitor 401, an inductor 402, and an inductor 404 connected in series in sequence. The inductor 401 is electrically connected to the second radiator at the second feeding point 1301, and the inductor 404 is electrically connected to the feeding unit. The first feeding network also includes a capacitor 403 connected in parallel between the inductor 402 and the inductor 404 to be grounded.

Optionally, the capacitance value of the capacitor 401 may be 1 pF, the inductance value of the inductor 402 may be 3.9 nH, the capacitance value of the capacitor 403 may be 0.5 pF, and the inductance value of the inductor 404 may be 1 nH.

It should be understood that the inductor 302 may be used to eliminate the resonance of WiFi in the 5 GHz frequency band.

Optionally, the third feeding network 500 may include an inductor 501 with one end grounded and the other end electrically connected to the decoupling element at the third feeding point 1101. The third feeding point 1101 and the feeding unit may be arranged in parallel in sequence. The inductor 502 and the capacitor 503 are connected in series, and the capacitor 504 and the inductor 505 are connected in series.

Optionally, the inductance value of the inductor 501 may be 1.5nH, the inductance value of the inductor 502 may be 3.2nH, the capacitance value of the capacitor 503 may be 0.5pF, the capacitance value of the capacitor 504 may be 1pF, and the inductance value of the inductor 505 may be 2nH.

It should be understood that the inductance 502 and the capacitor 503 connected in parallel form a band-stop circuit of 3.5 GHz, and the fifth resonance in the 2.4 GHz frequency band may be equivalent to an inductance, and the sixth resonance in the 5 GHz frequency band may be equivalent to a capacitor.

As shown in FIG. 17, the feeding unit of the terminal device can be arranged on the PCB 140, and is electrically connected to the first feeding point of the first radiator or the second feeding point of the second radiator of the antenna 100 through the elastic sheet 1403, or The elastic piece 1403 is electrically connected to the third feeding point of the decoupling member.

Optionally, the first radiator and the second radiator may be arranged on the bracket, and are electrically connected to the feeding unit on the PCB 140 through the elastic sheet 1403.

It should be understood that the technical solution provided by the embodiments of the present application can also be applied to the ground structure of the antenna. The antenna is connected to the floor through the elastic sheet. In the terminal device, the floor can be a middle frame or a PCB.

Optionally, the decoupling member can adopt this structure to achieve grounding.

It should be understood that the PCB is formed by pressing a multilayer dielectric board, and there is a metal plating layer in the multilayer dielectric board, which can be used as a reference ground for the antenna 100.

Optionally, the power feeding unit may be a power chip in the terminal device.

As shown in FIG. 18, the antenna 100 may be located on the PCB 140. Wherein, the decoupling member 110 may be located on the surface of the PCB 140, and the first radiator 120 and the second radiator 130 may be located inside the PCB.

Optionally, the PCB 140 may include a plurality of substrates 1404, and the plurality of substrates 1404 are arranged in a layered manner.

Optionally, the decoupling member 110 may be located on the surface of the outer substrate 1404, and the first radiator 120 and the second radiator 130 may be located on the surface of the inner substrate 1404. For example, the decoupling member 110 may be located on the surface of the first substrate 1405, and the first radiator 120 and the second radiator 130 may be located on the surface of the second substrate 1406. The first substrate 1405 and the second substrate 1406 may be adjacent substrates.

It should be understood that the structures of the decoupling element 110, the first radiator 120 and the second radiator 130 can be adjusted according to actual design or simulation results.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An antenna applied to terminal equipment, characterized in that it includes:

A decoupling member, a first radiator and a second radiator, the decoupling member is located between the first radiator and the second radiator;

Wherein, the decoupling member, the first radiator and the second radiator are not connected, and the decoupling member is metal;

The decoupling member includes a first radiating arm and a second radiating arm, the first radiator is disposed along the first radiating arm, and the first radiator and the first radiating arm partially overlap in a first direction , The second radiator is arranged along the second radiating arm, and the second radiator and the second radiating arm partially overlap in the first direction;

The first radiator includes a first feeding point, and the first feeding point is disposed at one end of the first radiator;

The second radiator includes a second feeding point, and the second feeding point is disposed at one end of the second radiator.
The antenna according to claim 1, wherein:

When feeding power at the first feeding point, the antenna generates a first resonance and a second resonance;

When the second feeding point is fed, the antenna generates a third resonance and a fourth resonance.
The antenna according to claim 1, wherein the decoupling member includes a ground point, and the decoupling member is grounded at the ground point.
The antenna according to claim 3, wherein the decoupling element is grounded at the grounding point through at least one of a concentrated capacitor, a lumped inductance, a coupling capacitor, a distributed capacitor, or a distributed inductance.
The antenna according to claim 1, wherein:

The decoupling member includes a third feeding point, and the third feeding point is disposed at one end of the decoupling member.
The antenna according to claim 5, wherein when the third feeding point is fed, the antenna generates a fifth resonance and a sixth resonance;

And the resonance point of the first resonance, the resonance point of the second resonance, the resonance point of the third resonance, the resonance point of the fourth resonance, the resonance point of the fifth resonance, and the resonance point of the sixth resonance Any two of the resonance points of the resonance are not the same.
The antenna according to claim 5, wherein:

A first matching network is provided at the first feeding point, a second matching network is provided at the second feeding point, and a third matching network is provided at the third feeding point. The first matching The second matching network and the third matching network are used for matching the fifth resonance and the sixth resonance.
The antenna according to claim 2, wherein:

The frequency of the resonance point of the first resonance is less than the frequency of the resonance point of the second resonance, and the frequency of the resonance point of the third resonance is less than the frequency of the resonance point of the fourth resonance;

The length of the decoupling element is greater than one quarter of the wavelength corresponding to the resonance point of the first resonance or one quarter of the wavelength corresponding to the resonance point of the third resonance;

The length of the decoupling member is less than one half of the wavelength corresponding to the resonance point of the first resonance or one half of the wavelength corresponding to the resonance point of the third resonance.
The antenna according to claim 2, wherein the length of the first radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the second resonance.
The antenna according to claim 2, wherein the length of the second radiator is greater than or equal to a quarter of the wavelength corresponding to the resonance point of the fourth resonance.
A terminal device, characterized in that the terminal device comprises the antenna according to any one of the preceding claims 1 to 10.