WO2021017625A1

WO2021017625A1 - Antenna module and mobile terminal

Info

Publication number: WO2021017625A1
Application number: PCT/CN2020/094017
Authority: WO
Inventors: 洪崇育
Original assignee: 深圳市万普拉斯科技有限公司
Priority date: 2019-07-26
Filing date: 2020-06-02
Publication date: 2021-02-04
Also published as: CN110429394B; CN110429394A

Abstract

Disclosed are an antenna module and a mobile terminal. The antenna module comprises a feeding tuning circuit for switching the feeding position of an antenna base to a first feeding point or a second feeding point; a first impedance tuning circuit comprises a first switch and a plurality of matching branches; the first switch switches the connection state between the antenna base and the plurality of matching branches; a second impedance tuning circuit comprises a second switch and a plurality of matching branches; the second switch switches the connection state between the antenna base and the plurality of matching branches; the feeding position of the antenna base, the connection state between the antenna base and each matching branch in the first impedance tuning circuit, and the connection state between the antenna base and each matching branch in the second impedance tuning circuit are switched according to the control signal to enable the antenna base to transmit and receive data in a first radiation direction or a second radiation direction. In the technical solution of the present application, the antenna module having two radiation directions is fed by means of different feeding points so as to reduce the return loss and enhance the radiation capability.

Description

Antenna module and mobile terminal

Cross references to related applications

This application is filed based on a Chinese patent application with an application number of 201910682383.8 and an application date of July 26, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

This application relates to the field of antenna technology, and in particular to an antenna module and a mobile terminal.

Background technique

Existing mobile terminals often have antennas at the edges of the mobile terminals, and transmit and receive radio frequency signals through the antenna. The radio frequency signals are sine waves with high oscillation frequencies, and their energy values are often applied to the human head or arm. The current international standard is that the electromagnetic radiation energy absorbed per kilogram of brain tissue cannot exceed 2W in 6 minutes. Due to the rapid development of mobile communication technology, mobile terminals have become thinner and lighter, with higher performance requirements, antennas have become smaller and smaller, gains have become higher and higher, and radiation bandwidths have become wider and wider. , A larger antenna gain often leads to a higher SAR value. During a near-field call, the human body easily absorbs radio frequency energy, which leads to a higher SAR value and reduces antenna radiation performance.

In addition to the high SAR value caused by the aforementioned call situations, when the user holds the terminal (for example, holding both ends of the mobile terminal during games, or holding the mobile terminal with the left or right hand when using the mobile phone normally), it is also easy to block the antenna. The antenna performance is greatly reduced.

Summary of the invention

In view of the foregoing problems, the purpose of the embodiments of the present application is to provide an antenna module and a mobile terminal to solve the deficiencies of the prior art.

According to an embodiment of the present application, an antenna module is provided, and the antenna module includes:

Antenna base, feed tuning circuit, first impedance tuning circuit, and second impedance tuning circuit;

The feeding tuning circuit and the antenna base are connected at a first feeding point or a second feeding point, the first impedance tuning circuit and the antenna base are connected at a first connection point, and the second The impedance tuning circuit is connected to the antenna base at a second connection point, and the first connection point and the second connection point are arranged on both sides of the first feeding point and the second feeding point;

The feeding tuning circuit is used to switch the feeding position of the antenna base to the first feeding point or the second feeding point;

The first impedance tuning circuit includes a first switch and a plurality of matching branches, and the first switch is used to switch the connection state of the antenna base and the plurality of matching branches, wherein the first impedance tuning There are at least two different impedances in the multiple matching branches of the circuit;

The second impedance tuning circuit includes a second switch and a plurality of matching branches. The second switch is used to switch the connection state of the antenna base and the plurality of matching branches, wherein the second impedance tuning There are at least two different impedances in the multiple matching branches of the circuit;

Switch the feed position of the antenna base, the connection state between the antenna base and each matching branch in the first impedance tuning circuit, and the antenna base and the second impedance according to the control signal from the processor The connection state between the matching branches in the circuit is tuned, so that the antenna base can send and receive data in the first radiation direction or the second radiation direction.

In the above antenna module, the control signal includes a first control signal and a second control signal;

Upon receiving the first control signal, the feeding tuning circuit switches the feeding position to a first feeding point, and the first switch connects the antenna base to the first impedance tuning circuit At least one matching branch in the second impedance tuning circuit, and the second switch connects the antenna base to at least one matching branch in the second impedance tuning circuit, so that the antenna module is in the first radiation direction, wherein the first The impedance of at least one matching branch in an impedance tuning circuit is smaller than the impedance of at least one matching branch in the second impedance tuning circuit;

When receiving the second control signal, the feed tuning circuit switches the feed position of the antenna base to a second feed point, and the first switch connects the antenna base to the first At least one matching branch in the impedance tuning circuit, and the second switch connects the antenna base to at least one matching branch in the second impedance tuning circuit, so that the antenna module is in the second radiation direction, wherein, The impedance of at least one matching branch in the first impedance tuning circuit is greater than the impedance of at least one matching branch in the second impedance tuning circuit.

In the above antenna module, the first impedance tuning circuit includes a first matching branch and a second matching branch, and the second impedance tuning circuit includes a third matching branch and a fourth matching branch;

When receiving the first control signal, the first switch connects the antenna base to the second matching branch, and the second switch connects the antenna base to the fourth Matching branches so that the antenna module is in the first radiation direction;

When receiving the second control signal, the first switch connects the antenna base to the first matching branch, and the second switch connects the antenna base to the third Match the branch so that the antenna module is in the second radiation direction.

In the above antenna module, the second matching branch includes a first wire, one end of the first wire is connected to the antenna base at the first connection point, and the other end is shorted to ground;

The fourth matching branch includes a second wire, one end of the second wire is connected to the antenna base at the second connection point, and the other end is open;

The first matching branch includes a third wire, one end of the third wire is connected to the antenna base at the first connection point, and the other end is open;

The third matching branch includes a fourth wire, one end of the fourth wire is connected to the antenna base at the second connection point, and the other end is shorted to ground.

In the above antenna module, the first matching branch, the second matching branch, the third matching branch, and the fourth matching branch each include any one of an inductor, a capacitor, and a resistance Or multiple.

In the above antenna module, the second matching branch includes a first inductor, one end of the first inductor is connected to the antenna base at the first connection point, and the other end is grounded;

The fourth matching branch includes a second inductor, one end of the second inductor is connected to the antenna base at the second connection point, and the other end is grounded, and the inductance value of the first inductor is smaller than the first inductor. 2. The inductance value of the inductor;

The first matching branch includes a third inductor, one end of the third inductor is connected to the antenna base at the first connection point, and the other end is grounded;

The third matching branch includes a fourth inductor, one end of the fourth inductor is connected to the antenna base at the second connection point, and the other end is grounded, and the inductance value of the third inductor is greater than that of the first 4. The inductance value of the inductor.

In the above antenna module, the second matching branch includes a first capacitor, one end of the first capacitor is connected to the antenna base at the first connection point, and the other end is grounded;

The fourth matching branch includes a second capacitor, one end of the second capacitor is connected to the antenna base at the second connection point, and the other end is grounded. The capacitance value of the first capacitor is greater than that of the first capacitor. The capacitance value of the second capacitor;

The first matching branch includes a third capacitor, one end of the third capacitor is connected to the antenna base at the first connection point, and the other end is grounded;

The third matching branch includes a fourth capacitor, one end of the fourth capacitor is connected to the antenna base at the second connection point, and the other end is grounded, and the capacitance value of the third capacitor is smaller than that of the first The capacitance value of the four capacitors.

In the above-mentioned antenna module, the feeding tuning circuit includes a feeding tuning switch for switching the feeding position of the antenna base, and the output terminal of the feeding tuning switch and the antenna base are in the first The feed point or the second feed point is connected, and the input terminal receives the feed signal.

In the above-mentioned antenna module, the feed tuning circuit further includes a first shunt inductor and a second shunt inductor for protecting the feed tuning switch;

One end of the first shunt inductor is connected to the first feeding point, and the other end is grounded;

One end of the second shunt inductor is connected to the second feeding point, and the other end is grounded.

In the above antenna module, the feeder tuning circuit further includes a feeder impedance tuner, the output end of the feeder impedance tuner is connected to the feeder tuning switch, and the input end receives a feed signal for matching The impedance of the antenna module at the first feeding point or the second feeding point.

In the aforementioned antenna module, the first radiation direction is opposite to the second radiation direction.

According to another embodiment of the present application, a mobile terminal is provided, the mobile terminal includes the above-mentioned antenna module, processor, and monitoring unit;

The monitoring unit is used to collect mode monitoring signals;

The processor is configured to identify the working mode of the mobile terminal according to the mode monitoring signal, and send a corresponding control signal to the antenna module according to the working mode.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In an antenna module and a mobile terminal in the embodiment of the application, the feed position of the antenna base, the connection state between the antenna base and each matching branch, and the impedance of each matching branch in the connected state are adjusted to make the The antenna module has different radiation directions, which avoids the problem of a high SAR value and a linear decline in antenna performance caused when the antenna module is blocked, so that the antenna module has a lower antenna reflection loss, and greatly enhances the radiation capability of the antenna module.

In order to make the above-mentioned objectives, features and advantages of the present application more obvious and understandable, the preferred embodiments and accompanying drawings are described in detail as follows.

Description of the drawings

In order to explain the technical solution of the present application more clearly, the drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and should not be It is regarded as a limitation of the scope of protection of the present application. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work.

Fig. 1 shows a schematic structural diagram of a first antenna module provided by an embodiment of the present application.

FIG. 2 shows a schematic structural diagram of a first antenna module in a first radiation direction according to an embodiment of the present application.

FIG. 3 shows a schematic structural diagram of a first antenna module in a second radiation direction according to an embodiment of the present application.

FIG. 4 shows a schematic structural diagram of a second antenna module in a first radiation direction provided by an embodiment of the present application.

Fig. 5 shows a schematic structural diagram of a second antenna module in a second radiation direction provided by an embodiment of the present application.

Fig. 6 shows a schematic structural diagram of a third antenna module provided in an embodiment of the present application in the first radiation direction.

FIG. 7 shows a schematic structural diagram of a third antenna module provided in an embodiment of the present application in the second radiation direction.

FIG. 8 shows a schematic structural diagram of a fourth antenna module in the first radiation direction according to an embodiment of the present application.

FIG. 9 shows a schematic structural diagram of a fourth antenna module in a second radiation direction according to an embodiment of the present application.

FIG. 10 shows a waveform diagram of the return loss of the antenna module in the first radiation direction according to an embodiment of the present application.

FIG. 11 shows a schematic diagram of a waveform of the return loss of the antenna module in the second radiation direction according to an embodiment of the present application.

FIG. 12 shows a schematic structural diagram of a fifth antenna module in the first radiation direction according to an embodiment of the present application.

FIG. 13 shows a schematic structural diagram of a fifth antenna module provided in an embodiment of the present application in the second radiation direction.

FIG. 14 shows a schematic structural diagram of a sixth antenna module provided by an embodiment of the present application.

FIG. 15 shows a schematic structural diagram of a seventh antenna module provided by an embodiment of the present application.

FIG. 16 shows a schematic structural diagram of a mobile terminal provided by an embodiment of the present application.

FIG. 17 shows a schematic diagram of the distribution of antenna modules of a mobile terminal according to an embodiment of the present application.

Symbol description of main components:

100-antenna module; 10-antenna base; 20-feed tuning circuit; 21-feed tuning switch; 22-first shunt inductor; 23-second shunt inductor; 24-feed impedance tuner; 30-first Impedance tuning circuit; 31-first switch; 32-first matching branch; 321-third inductor; 322-third capacitor; 33-second matching branch; 331-first inductor; 332-first capacitor ; 40-second impedance tuning circuit; 41-second switch; 42-third matching branch; 421-fourth inductor; 422-fourth capacitor; 43-fourth matching branch; 43-second inductor; 432-Second capacitor;

P11-first feeding point; P12-second feeding point; P2-first connection point; P3-second connection point;

1000-mobile terminal; 200-processor; 300-monitoring unit.

Detailed ways

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present application.

Hereinafter, some embodiments of the present application will be described in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Example 1

1, the antenna module 100 includes an antenna base 10, a feed tuning circuit 20, a first impedance tuning circuit 30 and a second impedance tuning circuit 40.

The feeding tuning circuit 20 and the antenna base 10 are connected at a first feeding point P11 or a second feeding point P12, and the first impedance tuning circuit 30 and the antenna base 10 are connected at a first connection point P2. The second impedance tuning circuit 40 and the antenna base 10 are connected at a second connection point P3, and the first connection point P2 and the second connection point P3 are arranged at the first feeding point P11 and both sides of the second feeding point P12.

The feeding tuning circuit 20 is used to switch the feeding position of the antenna base 10 to the first feeding point P11 or the second feeding point P12, and the feeding tuning circuit 20 adjusts the feeding position according to the control signal sent by the processor. The feeding position of the antenna base 10 is switched so that the feeding tuning circuit feeds the antenna base 10 at the first feeding point P11 or the second feeding point P12.

The antenna base 10 refers to an antenna arm used to connect each matching branch. In this embodiment, the antenna arm is a sheet structure. In some other embodiments, the antenna arm may also be a linear structure. .

Further, the feeding tuning circuit 20 includes a feeding tuning switch 21, and the output end of the feeding tuning switch 21 and the antenna base 10 are at the first feeding point P11 or the second feeding point. It is connected at P12, and the input terminal receives the feed signal. The feed tuning switch 21 includes any one of a tuning switch, a diode, a single pole single throw switch, and a single pole double throw switch. The feed signal is fed from the feed position connected to the feed tuning switch 21.

The first impedance tuning circuit 30 includes a first switching switch 31 and a plurality of matching branches. The first switching switch 31 is used to switch the connection state of the antenna base and the plurality of matching branches. The multiple matching branches of an impedance tuning circuit 30 have at least two different impedances.

For example, the first impedance tuning circuit 30 includes five matching branches, two of which have one impedance, the other two have another impedance, and the remaining one has another impedance.

The second impedance tuning circuit 40 includes a second switch 41 and a plurality of matching branches. The second switch 41 is used to switch the connection state of the antenna base and the plurality of matching branches. The multiple matching branches of the two-impedance tuning circuit 40 have at least two different impedances.

For example, the second impedance tuning circuit 40 includes four matching branches, one of which has one impedance, and the other three have another impedance.

According to the control signal from the processor, the feed position of the antenna base 10, the connection state between the antenna base 10 and each matching branch in the first impedance tuning circuit 30, and the antenna base 10 and the The connection state between the matching branches in the second impedance tuning circuit 40 enables the antenna base 10 to send and receive data in the first radiation direction or the second radiation direction.

Further, the control signal includes a first control signal and a second control signal.

When receiving the first control signal, the feeding tuning circuit 20 switches the feeding position to the first feeding point P11, and the first switch 31 connects the antenna base 10 to the first feeding point P11. At least one matching branch in an impedance tuning circuit 30, and the second switch 41 connects the antenna base 10 to at least one matching branch in the second impedance tuning circuit 40, so that the antenna module 100 is in the first A radiation direction, wherein the impedance of at least one matching branch in the first impedance tuning circuit 30 is smaller than the impedance of at least one matching branch in the second impedance tuning circuit 40.

Specifically, as shown in FIG. 2, the feeding tuning circuit 20 switches the feeding position to the first feeding point P11, and the first switch 31 connects the antenna base 10 to the first feeding point P11. A matching branch in the impedance tuning circuit 30 (shown on the left in FIG. 2), the second switch 41 connects the antenna base 10 to two matching branches with the same impedance in the second impedance tuning circuit 40 (such as 2), so that the antenna module 100 is in the first radiation direction (the left direction shown in FIG. 2), wherein the impedances of the two matching branches in the second impedance tuning circuit 40 can be the same or It can be different, and the impedance of each of the two matching branches in the second impedance tuning circuit 40 is greater than the impedance of one of the matching branches in the first impedance tuning circuit 30, and the second impedance tuning circuit 40 is connected Two matching branches are used to reduce the loss of the antenna module 100.

Of course, FIG. 2 is only a preferred embodiment. In order to reduce antenna loss, the first switch 31 can also connect the antenna base 10 to multiple matching branches with the same impedance, and the second switch 41 also The antenna base 10 can be connected to one matching branch or multiple matching branches with the same impedance. Regardless of the connection, the rule to follow is: the largest impedance in at least one matching branch in the first impedance tuning circuit 30 It is smaller than the smallest impedance of at least one matching branch in the second impedance tuning circuit 40.

When receiving the second control signal, the feed tuning circuit 20 switches the feed position of the antenna base 10 to a second feed point, and the first switch 31 connects the antenna base 10 to At least one matching branch in the first impedance tuning circuit 30, and the second switch 41 connects the antenna base 10 to at least one matching branch in the second impedance tuning circuit 40, so that the antenna module 100 is in the second radiation direction, wherein the impedance of the matching branch in the first impedance tuning circuit 30 is greater than the impedance of the matching branch in the second impedance tuning circuit 40.

Specifically, as shown in FIG. 3, the feed tuning circuit 20 switches the feed position to the second feed point P12, and the first switch 31 connects the antenna base 10 to the first feed point P12. Two matching branches with the same impedance in the impedance tuning circuit 30 (shown on the left in FIG. 3), the second switch 41 connects the antenna base 10 to a matching branch with the same impedance in the second impedance tuning circuit 40 (As shown on the right in 3), so that the antenna module 100 is in the second radiation direction (the right direction as shown in FIG. 3), wherein the two matching branches in the first impedance tuning circuit 30 The impedance of each matching branch is greater than the impedance of one matching branch in the second impedance tuning circuit 40, and the loss of the antenna module 100 is reduced by connecting the two matching branches to the first impedance tuning circuit 30.

Of course, FIG. 3 is only a preferred embodiment. In order to reduce antenna loss, the first switch 31 can also connect the antenna base 10 to a matching branch, and the second switch 41 can also connect the antenna The base 10 is connected to a plurality of matching branches of the same impedance. No matter how it is connected, the rule followed is: the smallest impedance in at least one matching branch in the first impedance tuning circuit 30 is greater than at least in the second impedance tuning circuit 40 The largest impedance in a matching branch.

Further, for ease of description, only the first impedance tuning circuit 30 includes two matching branches and the second impedance tuning circuit 40 includes two matching branches to describe this embodiment in detail. As shown in FIG. 4, the first impedance tuning circuit 30 includes a first matching branch 32 and a second matching branch 33, and the second impedance tuning circuit 40 includes a third matching branch 42 and a fourth matching branch. 43.

Upon receiving the first control signal, the first switch 31 connects the antenna base 10 to the second matching branch 33, and the second switch 41 connects the antenna base 10 To the fourth matching branch 43, so that the antenna module 100 is in the first radiation direction, wherein the impedance of the second matching branch 33 is smaller than the impedance of the fourth matching branch 43.

Specifically, as shown in FIG. 4, the feed tuning switch 21 is controlled according to the control signal sent by the processor to switch the feed position of the antenna base 10 to the first feed point P11. At this time, the antenna module 100 is at the first feed point P11. Feeding is performed at point P11, and the connection between the feeding tuning circuit 20 and the second feeding point P12 is disconnected. The first switch 31 is also controlled to connect the second matching branch 33 to the antenna base 10 and disconnect the first matching branch 32 and the antenna base 10. The second switch 41 is also controlled to connect the fourth matching branch 43 to the antenna base 10, and to disconnect the third matching branch 42 and the antenna base 10, because the second matching branch The impedance of the circuit 33 is smaller than the impedance of the fourth matching branch 43. The feed signal fed into the antenna module 100 flows through the antenna base 10 to the second matching branch 33. At this time, the antenna module 100 passes through the first Transceive medium and high frequency signals in the radiation direction.

Upon receiving the second control signal, the first switch 31 connects the antenna base 10 to the first matching branch 32, and the second switch 41 connects the antenna base 10 To the third matching branch 42 so that the antenna module 100 is in the second radiation direction, wherein the impedance of the first matching branch 32 is greater than the impedance of the third matching branch 42.

Specifically, as shown in FIG. 5, the feed tuning switch 21 is controlled according to the control signal sent by the processor to switch the feed position of the antenna base 10 to the second feed point P12. At this time, the antenna module 100 is at the second feed point. The power feeding is performed at the power point P12, and the power feeding tuning circuit 20 is disconnected from the first feeding point P11. The antenna module 100 also controls the first switch 31 to connect the first matching branch 32 and the antenna base 10 and disconnect the second matching branch 33 and the antenna base 10. The antenna module 100 also controls the second switch 41 to connect the third matching branch 42 to the antenna base 10, and disconnects the fourth matching branch 43 and the antenna base 10. The impedance of the first matching branch 32 is greater than the impedance of the third matching branch 42, and the feed signal fed into the antenna module 100 flows in the direction of the third matching branch 42 through the antenna base 10. At this time, The antenna module 100 transmits and receives medium and high frequency signals through the second radiation direction.

It is worth noting that the first matching branch 32, the second matching branch 33, the third matching branch 42, and the fourth matching branch 43 are all used to match the impedance of the antenna module 100, so that the antenna module 100 to achieve better radiation performance.

Further, in order to make the coverage of the antenna module 100 larger and the radiation effect better, the first radiation direction is opposite to the second radiation direction.

Further, the second matching branch 33 includes a first wire, one end of the first wire is connected to the antenna base 10 at the first connection point P2, and the other end is shorted to ground. The four matching branch 43 includes a second wire, one end of the second wire is connected to the antenna base 10 at the second connection point P3, and the other end is open; the first matching branch 32 includes a third wire One end of the third wire is connected to the antenna base 10 at the first connection point P2, and the other end is open. The third matching branch 42 includes a fourth wire, and one end of the fourth wire is connected to The antenna base 10 is connected at the second connection point P3, and the other end is shorted to ground.

Specifically, as shown in FIG. 6, when the first control signal sent by the processor is received, one end of the first wire is connected to the first connection point P2 of the antenna base 10 through the first switch 31, The other end is grounded. One end of the second wire is connected to the second connection point P3 of the antenna base 10 through the second switch 41, and the other end is open to the ground.

In the above case, the feed signal is fed into the antenna base 10 through the first feeding point P11. Since the second matching branch 33 is in a short-circuit state with the ground, and the fourth matching branch 43 is in an open-circuit state with the ground. , The feed signal flows to the second matching branch 33 through the antenna base 10 at the first feeding point P11, so that the radiation direction of the medium/high frequency (M/HB) signal of the antenna module 100 passes through the antenna from the first feeding point P11 The base 10 points in the direction of the second matching branch 33 (the left direction in FIG. 6 ), and the above-mentioned left direction is taken as the first radiation direction of the antenna module 100. When the right antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the first radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

As shown in FIG. 7, when the second control signal sent by the processor is received, one end of the third wire is connected to the first connection point P2 of the antenna base 10 through the first switch 31, and the other end is It is open to ground. One end of the fourth wire is connected to the second connection point P3 of the antenna base 10 through the second switch 41, and the other end is shorted to ground.

In the above case, the feed signal is fed into the antenna base 10 through the second feeding point P12. Since the first matching branch 32 is in an open state with the ground, the third matching branch 42 is in a short-circuit state with the ground. , The feed signal flows to the third matching branch 42 through the antenna base 10 at the second feed point P12, so that the medium/high frequency (M/HB) signal radiation direction of the antenna module 100 passes through the antenna base from the second feed point P12 10 points to the direction of the third matching branch 42 (the right direction in FIG. 7), and the above-mentioned right direction is taken as the second radiation direction of the antenna module 100. When the left antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the second radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

In addition to the wire solution described above, in some other solutions, the first matching branch 32, the second matching branch 33, the third matching branch 42, and the fourth matching branch 43 are each It includes any one or more of matching devices such as inductors, capacitors, and resistors.

As another preferred solution, as shown in FIG. 8, the second matching branch 33 includes a first inductor 331, the fourth matching branch 43 includes a second inductor 431, and one end of the first inductor 331 passes The first switch 31 is connected to the antenna base 10 at a first connection point P2, and the other end is grounded. One end of the second inductor 431 is connected to the antenna base 10 through the second switch 41 and the antenna base 10 The two connection points P3 are connected, and the other end is grounded. The inductance value of the first inductor 331 is smaller than the inductance value of the second inductor 431.

Specifically, the feed signal is fed into the antenna base 10 through the first feed point P11. Since the inductance value of the first inductor 331 is smaller than the inductance value of the second inductor 431, the low frequency of the second inductor 431 is The ability to block high frequency is stronger than that of the first inductor 331. Therefore, the feed signal flows to the first inductor 331 through the antenna base 10 at the first feeding point P11, so that the radiation direction of the medium/high frequency (M/HB) signal of the antenna module 100 passes through the antenna base from the first feeding point P11. 10 points to the direction of the first inductor 331 (the left direction in FIG. 8), and the above-mentioned left direction is taken as the first radiation direction of the antenna module 100. When the right antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the first radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

As shown in FIG. 9, the first matching branch 32 includes a third inductor 321, the third matching branch 42 includes a fourth inductor 421, and one end of the third inductor 321 passes through the first switch 31. It is connected to the antenna base 10 at the first connection point P2, and the other end is grounded. One end of the fourth inductor 421 is connected to the antenna base 10 at the second connection point P3 through the second switch 41, The other end is grounded, and the inductance value of the third inductor 321 is greater than the inductance value of the fourth inductor 421.

Specifically, the feed signal is fed into the antenna base 10 through the second feeding point P12. Since the inductance value of the third inductor 321 is greater than the inductance value of the fourth inductor 421, the low frequency, The ability to block high frequencies is stronger than that of the fourth inductor 421. Therefore, the feed signal flows to the fourth inductor 421 through the antenna base 10 at the second feed point P12, so that the radiation direction of the medium/high frequency (M/HB) signal of the antenna module 100 passes through the antenna base from the second feed point P12. 10 points to the direction of the fourth inductor 421 (the right direction in FIG. 9), and the above-mentioned right direction is used as the second radiation direction of the antenna module 100. When the left antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the second radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

As shown in Fig. 10, the L2 waveform is the waveform of the return loss of the antenna module 100 in the first radiation direction, and L1 is the antenna module that is fed through the same feeding position in different radiation directions (here called in The antenna modules fed through the same feeding position in different radiation directions are the waveforms of the return loss of the antenna module Q) in the first radiation direction. Generally, mobile terminal antennas use -6dB return loss as the reference standard. The smaller the return loss of the RF signal energy, the more energy the RF signal transmits from the antenna module, and the better the radiation capability of the antenna module. The comparison shows that compared with the L1 waveform, the L2 waveform has more frequency components that meet the -6dB standard, the antenna module 100 can radiate a wider bandwidth, and the loss of the radio frequency signal radiated from the antenna module 100 is smaller. The antenna module 100 has better radiation performance than the antenna module Q.

As shown in FIG. 11, the L4 waveform is the waveform of the return loss of the antenna module 100 in the second radiation direction, and L3 is the waveform of the return loss of the antenna module Q in the second radiation direction. The comparison shows that compared with the L3 waveform, the L4 waveform has more frequency components that meet the -6dB standard, the antenna module 100 can radiate a wider bandwidth, and the loss of the radio frequency signal radiated from the antenna module 100 is smaller. The antenna module 100 has better radiation performance than the antenna module Q.

As another preferred solution, as shown in FIG. 12, the second matching branch 33 includes a first capacitor 332, the fourth matching branch 43 includes a second capacitor 432, and one end of the first capacitor 332 passes The first switch 31 and the antenna base 10 are connected at the first connection point P2, and the other end is grounded. One end of the second capacitor 432 is connected to the antenna base 10 through the second switch 41 at the first connection point P2. The two connection points P3 are connected, and the other end is grounded. The capacitance value of the first capacitor 332 is greater than the capacitance value of the second capacitor 432.

Specifically, the feed signal is fed into the antenna base 10 through the first feeding point P11. Since the capacitance value of the first capacitor 332 is greater than the capacitance value of the second capacitor 432, the larger the capacitance, the higher the passing frequency. Therefore, the frequency component passed by the first capacitor 332 is higher than the frequency component passed by the second capacitor 432. Therefore, the feed signal flows to the first capacitor 332 through the antenna base 10 at the first feeding point P11, so that the radiation direction of the medium/high frequency (M/HB) signal of the antenna module 100 passes through the antenna base from the first feeding point P11. 10 points to the direction of the first capacitor 332 (the left direction in FIG. 12), and the above-mentioned left direction is taken as the first radiation direction of the antenna module 100. When the right antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the first radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

As shown in FIG. 13, the first matching branch 32 includes a third capacitor 322, the third matching branch 42 includes a fourth capacitor 422, and one end of the third capacitor 322 passes through the first switch 31. It is connected to the antenna base 10 at the first connection point P2, and the other end is grounded, one end of the fourth capacitor 422 is connected to the antenna base 10 at the second connection point P3 through the second switch 41, The other end is grounded, and the capacitance value of the third capacitor 322 is smaller than the capacitance value of the fourth capacitor 422.

Specifically, the feed signal is fed into the antenna base 10 through the second feeding point P12. Since the capacitance value of the third capacitor 322 is smaller than the capacitance value of the fourth capacitor 422, the larger the capacitance, the higher the passing frequency. Therefore, the frequency component passed by the fourth capacitor 422 is higher than the frequency component passed by the third capacitor 322. Therefore, the feed signal flows to the fourth capacitor 422 through the antenna base 10 at the second feeding point P12, so that the radiation direction of the medium/high frequency (M/HB) signal of the antenna module 100 passes through the antenna base from the first feeding point P11. 10 points to the direction of the fourth capacitor 422 (the right direction in FIG. 13), and the above-mentioned right direction is taken as the second radiation direction of the antenna module 100. When the left antenna of the antenna module 100 is blocked, radio frequency signals can be sent and received through the second radiation direction, thereby ensuring the radiation performance of the antenna module 100 and improving user experience.

Of course, in some other solutions, when the first control signal is received, the above-mentioned second matching branch 33 may also include a first resistor, and the fourth matching branch 43 may also include a second resistor. The resistance of the resistor is greater than the resistance of the second resistor. When the second control signal is received, the aforementioned first matching branch 32 may further include a third resistor, and the third matching branch 42 may further include a fourth resistor, wherein the resistance of the fourth resistor is greater than that of the third resistor. The resistance of the resistor. According to the principle that the higher the resistance value, the higher the passing frequency, the antenna module 100 can achieve different radiation directions when it is connected to each matching circuit in different ways, which will not be repeated here.

Further, as shown in FIG. 14, the feed tuning circuit 20 further includes a first shunt inductor 22 and a second shunt inductor 23. One end of the first shunt inductor 22 is connected to the first feeding point P11, and the other end Grounding; one end of the second shunt inductor 23 is connected to the second feeding point P12, and the other end is grounded. The first shunt inductor 22 is used for protecting the feeding tuning circuit 20 when the feeding tuning circuit 20 is connected to the first feeding point P11, so as to prevent high impact pulse signals from affecting the feeding tuning circuit. 20 damage caused. The second shunt inductor is used to protect the feeding tuning circuit 20 when the feeding tuning circuit 20 is connected to the second feeding point P12, so as to prevent the feeding tuning circuit 20 from being affected by high-impact pulse signals. The damage caused.

Specifically, when the feeding tuning circuit 20 includes the feeding tuning switch 21, when the first control signal is received, the output terminal of the feeding tuning switch 21 is connected to the first feeding point P11, so One end of the first shunt inductor 22 is connected to the first feeding point P11 and the other end is grounded. In this case, the antenna module 100 protects the feed tuning switch 21 through the first shunt inductor 22. When the second control signal is received, the output end of the feed tuning switch 21 is connected to the second feed point P12, one end of the second shunt inductor 23 is the second feed point P12, and the other end is grounded. In this case, the antenna module 100 protects the feed tuning switch 21 through the second shunt inductor 23.

Further, as shown in FIG. 15, the feed tuning circuit 20 further includes a feed impedance tuner 24, the output end of the feed impedance tuner 24 is connected to the feed tuning switch 21, and the input end is connected to the feed For the source signal, the feed impedance tuner 24 includes one or more of resistance, inductance, or capacitance, and is used to match the impedance of the antenna module 100 at the first feeding point P11 or the second feeding point P12.

Specifically, when the first control signal is received, the feed impedance tuner 24 is used to adjust the values of its components to tune the impedance of the antenna module 100 at the first feed point P11, so that the The antenna module 100 has the best radiation performance at the first feeding point P11; when receiving the second control signal, the feeding impedance tuner 24 is used to adjust the values of its components to tune the antenna module The impedance of 100 at the second feeding point P12 is such that the antenna module 100 has the best radiation performance at the second feeding point P12.

Example 2

As shown in FIG. 16, a mobile terminal 1000 is proposed. The mobile terminal 1000 includes the antenna module 100, the processor 200, and the monitoring unit 300 described above.

Both the antenna module 100 and the monitoring unit 300 are connected to the processor 200.

The monitoring unit 300 is used to collect mode monitoring signals.

In this embodiment, the antenna module 100 is disposed at the bottom of the mobile terminal 1000, and the two radiation directions are the left and right directions of the bottom, respectively. The monitoring unit 300 may be sensors arranged on the left and right sides of the bottom, and the sensors may collect a mode monitoring signal indicating the blocking information when the antenna module 100 is blocked.

In some other embodiments, the monitoring unit may also be a capacitor board level arranged on the left and right sides of the bottom. When the human body is close to the mobile terminal 1000, it serves as another capacitor board level. Change, and use the changed capacitance as the mode monitoring signal.

The processor 200 is configured to identify the working mode of the mobile terminal 1000 according to the mode monitoring signal, and send corresponding control signals to the antenna module 100 according to the working mode.

The processor 200 recognizes whether each radiation direction of the antenna module 100 is blocked according to the above-mentioned mode monitoring signal, and determines the working mode of the mobile terminal 1000 according to the recognition result.

For example, when part of the antenna in the first radiation direction of the antenna module 100 is blocked, it is determined that the mobile terminal 1000 is in the second working mode. In the second working mode, the processor sends a second control signal to enable The antenna module 100 transmits and receives data through the second radiation direction; when part of the antenna in the second radiation direction of the antenna module 100 is blocked, it is determined that the mobile terminal 1000 is in the first working mode. In the first working mode, the The processor sends a first control signal to enable the antenna module 100 to send and receive data through the first radiation direction.

In order to further explain the working mode of the mobile terminal 1000, as shown in FIG. 17, this application also proposes another mobile terminal, and the mobile terminal further includes a first antenna ANT1. The first antenna ANT1 has one radiation direction (towards the upper side of the mobile terminal in FIG. 17), and the second antenna ANT2 (that is, the antenna module 100 described in Embodiment 1 of the present application) has two radiation directions (the first radiation The direction is the right direction in Fig. 17, and the second radiation direction is the left direction in Fig. 17).

When it is detected that the user holds the mobile terminal in both hands, for example, in the game mode, the user shields the second antenna ANT2 of the mobile terminal with one hand and the other hand shields the first antenna ANT1. At this time, it is determined The mobile terminal 1000 is in the second working mode, the processor sends a second control signal to the antenna module 100, and the antenna module 100 transmits and receives data through the second radiation direction.

When it is detected that the user is holding the mobile terminal with one hand, for example, in a near-field call, when the user holds the mobile terminal with the right hand, the antenna of the second radiation direction portion of the second antenna ANT2 is blocked, and at the same time, in order to make the first antenna ANT1 have With a better SAR value, it is determined that the mobile terminal 1000 is in the first working mode, the processor sends a first control signal to the antenna module 100, and the antenna module 100 transmits and receives data through the first radiation direction.

For another example, during a near-field call, when the user holds the mobile terminal with his left hand, the antenna of the first radiation direction portion of the second antenna ANT2 is blocked. At the same time, in order to make the first antenna ANT1 have a better SAR value, it is determined that the The mobile terminal 1000 is in the second working mode, the processor sends a second control signal to the antenna module 100, and the antenna module 100 transmits and receives data through the second radiation direction.

It is worth noting that those skilled in the art can understand that the above-mentioned components do not constitute a limitation on the mobile terminal 1000. The mobile terminal 1000 may also include more or fewer components, or combine certain components, or different components. The layout of the components. For example, the mobile terminal 1000 may also include a memory, an input unit, a display unit, a photographing unit, an audio circuit, a wireless fidelity (WiFi) module, and a power supply. The memory may mainly include a storage program area and a storage data area. The storage program area may store an operating system and at least one application program required by a function, and the storage data area may store data created according to the use of the mobile terminal; the input unit may include The touch panel can also include other input devices; the display unit can include a display panel; the camera unit is used to collect image information within the imaging range; the audio circuit can provide an audio interface between the user and the mobile terminal; the wireless fidelity module can help the user It provides users with wireless broadband Internet access for sending and receiving emails, browsing web pages and accessing streaming media. The main processor is the control center of the mobile terminal. In addition to the above functions, the main processor can also use various interfaces and lines Connect the various parts of the entire mobile terminal, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory, executing various functions and processing data of the mobile terminal, so as to integrate the mobile terminal Monitoring: The power supply can be connected to the processor logic through the power management system, so that functions such as charging, discharging, and power consumption management can be managed through the power management system.

Those skilled in the art can understand that the above-mentioned mobile terminal structure does not constitute a limitation on the mobile terminal, and may include more or fewer components, or combine certain components, or arrange different components.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and structural diagrams in the accompanying drawings show the possible implementation architecture and functions of the devices, methods, and computer program products according to multiple embodiments of the present application. And operation. In this regard, each block in the flowchart or block diagram may represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more functions for realizing the specified logic function. Executable instructions. It should also be noted that, in alternative implementations, the functions marked in the block may also occur in a different order from the order marked in the drawings. For example, two consecutive blocks can actually be executed in parallel, or they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the structure diagram and/or flowchart, and the combination of the blocks in the structure diagram and/or flowchart, can be used as a dedicated hardware-based system that performs specified functions or actions. , Or can be realized by a combination of dedicated hardware and computer instructions.

In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.

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.

Claims

An antenna module, the antenna module comprising:

Antenna base, feed tuning circuit, first impedance tuning circuit, and second impedance tuning circuit;

The feeding tuning circuit and the antenna base are connected at a first feeding point or a second feeding point, the first impedance tuning circuit and the antenna base are connected at a first connection point, and the second The impedance tuning circuit is connected to the antenna base at a second connection point, and the first connection point and the second connection point are arranged on both sides of the first feeding point and the second feeding point;

The feeding tuning circuit is used to switch the feeding position of the antenna base to the first feeding point or the second feeding point;

The first impedance tuning circuit includes a first switch and a plurality of matching branches, and the first switch is used to switch the connection state of the antenna base and the plurality of matching branches, wherein the first impedance tuning There are at least two different impedances in the multiple matching branches of the circuit;

The second impedance tuning circuit includes a second switch and a plurality of matching branches. The second switch is used to switch the connection state of the antenna base and the plurality of matching branches, wherein the second impedance tuning There are at least two different impedances in the multiple matching branches of the circuit;

Switch the feed position of the antenna base, the connection state between the antenna base and each matching branch in the first impedance tuning circuit, and the antenna base and the second impedance according to the control signal from the processor The connection state between the matching branches in the circuit is tuned, so that the antenna base can send and receive data in the first radiation direction or the second radiation direction.
The antenna module according to claim 1, wherein the control signal includes a first control signal and a second control signal;

Upon receiving the first control signal, the feeding tuning circuit switches the feeding position to a first feeding point, and the first switch connects the antenna base to the first impedance tuning circuit At least one matching branch in the second impedance tuning circuit, and the second switch connects the antenna base to at least one matching branch in the second impedance tuning circuit, so that the antenna module is in the first radiation direction, wherein the first The impedance of at least one matching branch in an impedance tuning circuit is smaller than the impedance of at least one matching branch in the second impedance tuning circuit;

When receiving the second control signal, the feed tuning circuit switches the feed position of the antenna base to a second feed point, and the first switch connects the antenna base to the first At least one matching branch in the impedance tuning circuit, and the second switch connects the antenna base to at least one matching branch in the second impedance tuning circuit, so that the antenna module is in the second radiation direction, wherein, The impedance of at least one matching branch in the first impedance tuning circuit is greater than the impedance of at least one matching branch in the second impedance tuning circuit.
The antenna module according to claim 2, wherein the first impedance tuning circuit includes a first matching branch and a second matching branch, and the second impedance tuning circuit includes a third matching branch and a fourth matching branch. road;

When receiving the first control signal, the first switch connects the antenna base to the second matching branch, and the second switch connects the antenna base to the fourth Matching branches so that the antenna module is in the first radiation direction;

When receiving the second control signal, the first switch connects the antenna base to the first matching branch, and the second switch connects the antenna base to the third Match the branch so that the antenna module is in the second radiation direction.
The antenna module according to claim 3, wherein the second matching branch includes a first wire, one end of the first wire is connected to the antenna base at the first connection point, and the other end is connected to ground. Short;

The fourth matching branch includes a second wire, one end of the second wire is connected to the antenna base at the second connection point, and the other end is open;

The first matching branch includes a third wire, one end of the third wire is connected to the antenna base at the first connection point, and the other end is open;

The third matching branch includes a fourth wire, one end of the fourth wire is connected to the antenna base at the second connection point, and the other end is shorted to the ground.
The antenna module according to claim 3, wherein the second matching branch comprises a first inductor, one end of the first inductor is connected to the antenna base at the first connection point, and the other end is grounded;

The fourth matching branch includes a second inductor, one end of the second inductor is connected to the antenna base at the second connection point, and the other end is grounded, and the inductance value of the first inductor is smaller than the first inductor. 2. The inductance value of the inductor;

The first matching branch includes a third inductor, one end of the third inductor is connected to the antenna base at the first connection point, and the other end is grounded;

The third matching branch includes a fourth inductor, one end of the fourth inductor is connected to the antenna base at the second connection point, and the other end is grounded, and the inductance value of the third inductor is greater than that of the first 4. The inductance value of the inductor.
The antenna module according to claim 3, wherein the second matching branch comprises a first capacitor, one end of the first capacitor is connected to the antenna base at the first connection point, and the other end is grounded;

The fourth matching branch includes a second capacitor, one end of the second capacitor is connected to the antenna base at the second connection point, and the other end is grounded. The capacitance value of the first capacitor is greater than that of the first capacitor. The capacitance value of the second capacitor;

The first matching branch includes a third capacitor, one end of the third capacitor is connected to the antenna base at the first connection point, and the other end is grounded;

The third matching branch includes a fourth capacitor, one end of the fourth capacitor is connected to the antenna base at the second connection point, and the other end is grounded, and the capacitance value of the third capacitor is smaller than that of the first The capacitance value of the four capacitors.
The antenna module according to claim 2, wherein the feeding tuning circuit includes a feeding tuning switch for switching the feeding position of the antenna base, and the output terminal of the feeding tuning switch is connected to the antenna base It is connected at the first feeding point or the second feeding point, and the input terminal receives the feed signal.
8. The antenna module according to claim 7, wherein the feed tuning circuit further comprises a first shunt inductor and a second shunt inductor for protecting the feed tuning switch;

One end of the first shunt inductor is connected to the first feeding point, and the other end is grounded;

One end of the second shunt inductor is connected to the second feeding point, and the other end is grounded.
The antenna module according to claim 7, wherein the feeder tuning circuit further comprises a feeder impedance tuner, the output end of the feeder impedance tuner is connected to the feeder tuning switch, and the input end receives the feed signal , Used to match the impedance of the antenna module at the first feeding point or the second feeding point.
A mobile terminal, comprising the antenna module, processor and monitoring unit according to any one of claims 1 to 9;

The monitoring unit is used to collect mode monitoring signals;

The processor is configured to identify the working mode of the mobile terminal according to the mode monitoring signal, and send a corresponding control signal to the antenna module according to the working mode.