CN211238494U

CN211238494U - Antenna circuit and electronic equipment

Info

Publication number: CN211238494U
Application number: CN202020342493.8U
Authority: CN
Inventors: 付新建
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-08-11
Anticipated expiration: 2030-03-18

Abstract

The utility model provides an antenna circuit and electronic equipment relates to antenna technical field. The antenna circuit includes: the antenna comprises a first radiating arm, a second radiating arm, a third radiating arm, a medium-high frequency feed point and a low-frequency feed point; the first end of the first radiating arm is grounded, the medium-high frequency feeding point is arranged on the first radiating arm, a gap is arranged between the second end of the first radiating arm and the first end of the second radiating arm, the second end of the second radiating arm is connected with the first end of the third radiating arm, the second end of the third radiating arm is connected with the first end of the fourth radiating arm, and the second end of the fourth radiating arm is grounded; a first end of a first switch for tuning the medium-high frequency and the low frequency is connected to a connection point of the second radiating arm and the third radiating arm, and a second end of the first switch is grounded; the low-frequency feed point is arranged on the fourth radiation arm; and one end of the capacitor is grounded.

Description

Antenna circuit and electronic equipment

Technical Field

The utility model relates to an antenna technology field, in particular to antenna circuit and electronic equipment.

Background

The comprehensive screen becomes an epoch-making mainstream at present, and the antenna environment clearance is small, the antenna space is insufficient, the number of antennas is large, and in addition, when a 5G network is not yet popular, the 4G network still has a mainstream trend, so that a large number of mobile phones, intelligent wearing and the like still use the 4G network. Under the full-screen spelling, in order to improve the antenna performance, for example: free performance, first-hand performance, game hand performance, more and more mobile phone manufacturers adopt a metal frame as an antenna, however, because the frame has smaller broken joints, the tunable amplitude is smaller, and the required bandwidth is wider, tuning devices such as a switch and a tuner (tuner) are adopted, and because of the use of the tuning devices, the following influence is that the antenna cost is increased, and today when pursuing cost performance, the cost is a very important factor for the survival of enterprises.

The present antenna scheme is low frequency and medium and high frequency split scheme, and low frequency antenna and high frequency antenna all use two switches to carry out the tuning of antenna, and the switch that carries out the tuning of low frequency is the isolation problem of solving low frequency and medium and high frequency, but this kind of mode can increase 1 switch cost, can reduce the performance of low frequency moreover.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an antenna circuit and electronic equipment to solve current antenna design scheme, can increase the switching cost, also can cause the problem of the performance of reduction low frequency.

In order to solve the technical problem, the utility model discloses a following scheme realizes:

in a first aspect, an embodiment of the present invention provides an antenna circuit, including:

the antenna comprises a first radiating arm, a second radiating arm, a third radiating arm, a medium-high frequency feed point and a low-frequency feed point;

the first end of the first radiating arm is grounded, the medium-high frequency feeding point is arranged on the first radiating arm, a gap is arranged between the second end of the first radiating arm and the first end of the second radiating arm, the second end of the second radiating arm is connected with the first end of the third radiating arm, the second end of the third radiating arm is connected with the first end of the fourth radiating arm, and the second end of the fourth radiating arm is grounded;

a first end of a first switch for tuning the medium-high frequency and the low frequency is connected to a connection point of the second radiating arm and the third radiating arm, and a second end of the first switch is grounded;

the low-frequency feed point is arranged on the fourth radiation arm;

and one end of the capacitor is grounded.

In a second aspect, the embodiment of the present invention further provides an electronic device, including the above antenna circuit.

The utility model has the advantages that:

according to the scheme, the capacitor is connected with the low-frequency feed source in parallel at the low-frequency feed point, so that the low-frequency performance is not influenced, and meanwhile, the switching cost in the antenna circuit can be reduced.

Drawings

Fig. 1 shows one of the schematic structural diagrams of an antenna circuit according to an embodiment of the present invention;

fig. 2 is a second schematic diagram of an antenna circuit according to an embodiment of the present invention;

fig. 3 is a third schematic diagram of an antenna circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses to current antenna design, can increase the switching cost, also can cause the problem of the performance of reduction low frequency, provide an antenna circuit and electronic equipment.

As shown in fig. 1, an embodiment of the present invention provides an antenna circuit, including:

a first radiating arm 110, a second radiating arm 120, a third radiating arm 130, a medium-high frequency feeding point and a low-frequency feeding point;

a first end of the first radiation arm 110 is grounded, and the medium-high frequency feeding point is disposed on the first radiation arm 110, specifically, the medium-high frequency feeding point is used for connecting a medium-high frequency feed 111, a gap is disposed between a second end of the first radiation arm 110 and a first end of the second radiation arm 120, a second end of the second radiation arm 120 is connected to a first end of the third radiation arm 130, a second end of the third radiation arm 130 is connected to a first end of a fourth radiation arm 140 (the fourth radiation arm 140 is specifically an antenna model), and a second end of the fourth radiation arm 140 is grounded;

a first end of a first switch 200 for tuning the middle-high frequency and the low frequency is connected to a connection point of the second radiating arm 120 and the third radiating arm 130, and a second end of the first switch 200 is grounded;

the low-frequency feed point is arranged on the fourth radiating arm 140, and specifically, the low-frequency feed point is used for connecting a low-frequency feed source 141;

and the capacitor 400 is connected with the low-frequency feed point, and one end of the capacitor 400 is grounded.

It should be noted that, by such a connection manner of the capacitor 400, the capacitor is connected in parallel with the low-frequency feed source 141, and the capacitor 400 connected in parallel with the low-frequency feed source 141 is added to achieve isolation between low frequency and medium-high frequency, and a switch does not need to be added on the low-frequency side, so that the cost of the antenna circuit can be reduced.

It should be further noted that the first switch 200 includes a plurality of target devices, and the target devices are: capacitance and/or inductance, that is, the first switch 200 is formed of capacitance, inductance, or a combination of both.

Further, as shown in fig. 1, the antenna circuit further includes: a matching circuit 300;

the matching circuit 300 is connected to the low frequency feed point, and the capacitor 400 is connected to the low frequency feed point through the matching circuit 300.

Specifically, a first end of the matching circuit 300 is connected to the low frequency feed point, and a second end of the matching circuit 300 is connected to the low frequency feed 141 and the capacitor 400, respectively.

It still further needs to be said that, in order to adjust the low frequency resonance, the embodiment of the present invention provides the following two implementation manners:

mode one, as shown in fig. 2, the antenna circuit of the embodiment of the present invention further includes:

a first inductor 500;

a first terminal of the first inductor 500 is connected to a connection point of the fourth radiating arm 140 and the third radiating arm 130, and a second terminal of the first inductor 500 is grounded.

In this way, a capacitor is connected in parallel to the low-frequency feed source 141, so that the low-frequency impedance coil is adjusted toward the capacitor region, and meanwhile, the standing wave ratio (VSWR) of the low frequency becomes large, so that the reflected energy increases, so that an inductor needs to be connected in parallel to the connection between the fourth radiating arm 140 and the third radiating arm 130 to mitigate the influence caused by this way.

It should be noted that, in the antenna circuit in this implementation manner, the antenna cost is reduced and the low-frequency performance is improved without sacrificing the antenna performance, and the gamer performance is slightly improved because the medium-high frequency ground return path is lengthened.

Mode two, as shown in fig. 3, the antenna circuit of the embodiment of the present invention further includes:

a second inductor 600;

the second inductor 600 is connected to the low frequency feed point, and the second inductor 600 is grounded.

That is, the first end of the second inductor 600 is connected to the second end of the matching circuit 300, and the second end of the second inductor 600 is grounded, so that the second inductor 600, the capacitor 400 and the low frequency feed 141 are connected in parallel.

It should be noted that in this way, the inductor for tuning the low frequency is placed on the side of the low frequency feed source 141 to achieve the purpose of adjusting the low frequency resonance, and in this way, an elastic sheet for connecting the low frequency inductor is omitted, and meanwhile, the low frequency resonance can be adjusted, and the low frequency performance can also be improved.

The embodiment of the utility model provides a, under same structural environment, under the circumstances of guaranteeing same performance and isolation, the switch of cancellation low frequency department uses cheaper device, and the switch is replaced to electric capacity or inductance etc. can effectual reduction antenna cost improve the low frequency performance simultaneously.

The embodiment of the utility model provides a still provide an electronic equipment, including foretell antenna circuit.

It should be noted that, the electronic device provided with the antenna circuit ensures the stability of the low-frequency performance of the electronic device, and reduces the production cost of the electronic device.

Further, the first radiation arm, the second radiation arm, the third radiation arm and the fourth radiation arm are components of an electronic device outer frame.

The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Claims

1. An antenna circuit, comprising:

the low-frequency feed point is arranged on the fourth radiation arm;

and one end of the capacitor is grounded.

2. The antenna circuit of claim 1, further comprising:

a first inductor;

the first end of the first inductor is connected to the connection position of the fourth radiating arm and the third radiating arm, and the second end of the first inductor is grounded.

3. The antenna circuit of claim 1, further comprising:

a second inductor;

the second inductor is connected with the low-frequency feed point, and the second inductor is grounded.

4. The antenna circuit of claim 1, further comprising:

a matching circuit;

the matching circuit is connected with the low-frequency feed point, and the capacitor is connected with the low-frequency feed point through the matching circuit.

5. The antenna circuit of claim 1, wherein the first switch comprises a plurality of target devices, the target devices being: capacitance and/or inductance.

6. An electronic device, characterized in that it comprises an antenna circuit according to any one of claims 1 to 5.

7. The electronic device of claim 6, wherein the first radiating arm, the second radiating arm, the third radiating arm, and the fourth radiating arm are part of an electronic device housing.