WO2023072080A1

WO2023072080A1 - Antenna adjustment circuit, resonant frequency adjustment method, and electronic device

Info

Publication number: WO2023072080A1
Application number: PCT/CN2022/127398
Authority: WO
Inventors: 刘彦彬
Original assignee: 维沃移动通信有限公司
Priority date: 2021-10-27
Filing date: 2022-10-25
Publication date: 2023-05-04
Also published as: CN113964485A

Abstract

The present application provides an antenna adjustment circuit, a resonant frequency adjustment method, and an electronic device. The antenna adjustment circuit comprises a driving control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor. The driving control module is electrically connected to a first port and a second port of the antenna by means of the antenna matching circuit, separately. The first port of the antenna is grounded and electrically connected by means of the first adjustable capacitor. The second port of the antenna is grounded and electrically connected by means of the second adjustable capacitor. An adjustment end of the first adjustable capacitor and an adjustment end of the second adjustable capacitor are electrically connected to the driving control module, respectively. When the driving control module receives at least two target carriers, the capacitance values of the first adjustable capacitor and the second adjustable capacitor are adjusted, so that a resonant frequency corresponding to the antenna is a target resonant frequency, which is a carrier frequency corresponding to a target carrier having the maximum load modulation depth.

Description

Antenna adjustment circuit, resonant frequency adjustment method and electronic equipment

Cross References to Related Applications

This application claims priority to Chinese Patent Application No. 202111254015.7 filed in China on October 27, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The application belongs to the technical field of antennas, and in particular relates to an antenna adjustment circuit, a resonant frequency adjustment method and electronic equipment.

Background technique

With the gradual expansion of the application of Near Field Communication (NFC), more and more electronic devices support NFC technology.

In the NFC card reading scenario of the electronic device, the NFC antenna of the electronic device sends a carrier wave to the NFC card of the external device, and the NFC card receives the energy transmitted by the carrier wave to drive the internal circuit of the card to work. However, in the above process, if the carrier frequency sent by the NFC antenna greatly deviates from the carrier frequency supported by the NFC card, the electronic device will not be able to read the NFC card of the external device, resulting in card reading failure, which reduces the success rate of card reading.

Contents of the invention

The purpose of the embodiment of the present application is to provide an antenna adjustment circuit, a resonance frequency adjustment method and an electronic device, which can solve the technical problem of low success rate of card reading.

In order to solve the above-mentioned technical problems, the application is implemented as follows:

In the first aspect, an embodiment of the present application provides an antenna adjustment circuit, including a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor;

The drive control module is electrically connected to the first port and the second port of the antenna through the antenna matching circuit;

The first port of the antenna is electrically connected to ground through the first adjustable capacitor;

The second port of the antenna is electrically connected to ground through the second adjustable capacitor;

The adjusting end of the first adjustable capacitor and the adjusting end of the second adjustable capacitor are respectively electrically connected to the drive control module;

Wherein, when the drive control module receives at least two target carriers, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor, so that the resonant frequency corresponding to the antenna is the target resonant frequency , the target resonant frequency is the carrier frequency corresponding to the target carrier with the largest load modulation depth.

In a second aspect, an embodiment of the present application provides an electronic device, including the antenna adjustment circuit as described in the first aspect.

In a third aspect, an embodiment of the present application provides a resonant frequency adjustment method, which is applied to the antenna adjustment circuit described in the first aspect, and the method includes:

When the drive control module receives at least two target carriers, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor so that the resonant frequency corresponding to the antenna is the target resonant frequency, and the target resonant frequency is the modulation The carrier frequency corresponding to the target carrier with the largest depth.

In a fourth aspect, the embodiment of the present application provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the resonant frequency adjustment method as described in the third aspect is implemented. step.

In the fifth aspect, the embodiment of the present application provides a chip, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the third aspect. Resonant frequency adjustment method.

In a sixth aspect, an embodiment of the present application provides a computer program product, the computer program product is stored in a non-volatile storage medium, and the computer program product is executed by at least one processor to implement the third aspect. The resonant frequency adjustment method described above.

In a seventh aspect, an embodiment of the present application provides an electronic device configured to execute the method for adjusting a resonance frequency as described in the third aspect.

The antenna adjustment circuit in the embodiment of the present application includes a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor; the drive control module is respectively connected to the first port and the second port of the antenna through the antenna matching circuit Electrical connection; the first port of the antenna is electrically connected to the ground through the first adjustable capacitor; the second port of the antenna is electrically connected to the ground through the second adjustable capacitor; the adjustment end of the first adjustable capacitor and the adjustment end of the second adjustable capacitor respectively electrically connected with the drive control module. In the embodiment of the present application, when the drive control module in the antenna adjustment circuit receives at least two target carriers, it dynamically adjusts the resonant frequency corresponding to the antenna by adjusting the capacitance values of the first adjustable capacitor and the second adjustable capacitor , so that the carrier frequency of the electronic device antenna to send the carrier wave matches the carrier frequency supported by the card, improving the success rate of card reading.

Description of drawings

FIG. 1 is a schematic structural diagram of an antenna adjustment circuit provided by an embodiment of the present application;

Fig. 2 is one of the schematic diagrams of load modulation provided by the embodiment of the present application;

Fig. 3 is the second schematic diagram of load modulation provided by the embodiment of the present application;

Fig. 4 is a flowchart of a method for adjusting a resonance frequency provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an antenna adjustment circuit provided by an embodiment of the present application. As shown in FIG. 1, the antenna adjustment circuit includes a drive control module 100, an antenna matching circuit 200, an antenna 300, a first adjustable capacitor CA1 and a second adjustable capacitor CA2;

The drive control module 100 is electrically connected to the first port and the second port of the antenna 300 respectively through the antenna matching circuit 200;

The first port of the antenna 300 is electrically connected to ground through the first adjustable capacitor CA1;

The second port of the antenna 300 is electrically connected to the ground through the second adjustable capacitor CA2;

The adjusting end of the first adjustable capacitor CA1 and the adjusting end of the second adjustable capacitor CA2 are electrically connected to the drive control module 100 respectively.

The above-mentioned antenna adjustment circuit can be set in an electronic device. When the electronic device performs a card reading operation, the antenna 300 in the antenna adjustment circuit sends a carrier wave to the NFC card. After the NFC card receives the carrier wave, it load-modulates the carrier wave to form a target Carrier, the above-mentioned target carrier is a carrier modulated by the load, and the target carrier can drive the internal circuit of the card to work. Wherein, the aforementioned antenna 300 may be an NFC antenna 300 .

The antenna 300 in the antenna adjustment circuit receives the target carrier, and sends the target carrier to the drive control module 100 through the antenna matching circuit 200, and the drive control module 100 detects the modulation depth corresponding to the target carrier, and uses the modulation depth as the modulation depth corresponding to the target carrier depth.

Further, the resonant frequency of the antenna 300 can be dynamically adjusted by adjusting the capacitance values of the first adjustable capacitor CA1 and the second adjustable capacitor CA2, so that the resonant frequency corresponding to the antenna 300 is corresponding to the target carrier with the largest modulation depth. carrier frequency. For specific technical solutions, please refer to the subsequent embodiments.

In this embodiment, the antenna adjustment circuit adjusts the resonant frequency of the antenna 300 and the carrier frequency of the carrier wave transmitted by the antenna 300 based on the modulation depth corresponding to the carrier sent by the NFC card. This method of dynamically adjusting the resonant frequency of the antenna 300 can be effectively applied in electronic The application scenario where the device performs card reading operations.

It should be understood that during the whole process of card reading operation, the antenna 300 will send at least two carriers with different carrier frequencies to the NFC card. Exemplarily, the antenna 300 can first send a carrier with a carrier frequency of 13.26MHz to the NFC card, and then determine The modulation depth corresponding to the 13.26MHz carrier; then send the carrier with a carrier frequency of 12MHz to the NFC card, and then determine the modulation depth corresponding to the 12MHz carrier; finally send the carrier with a carrier frequency of 17MHz to the NFC card, and then determine the carrier corresponding to the 17MHz Modulation depth. In this way, the carrier with the largest modulation depth is determined, and the resonant frequency of the antenna 300 is adjusted to the carrier frequency corresponding to the carrier with the largest modulation depth.

It should be understood that while the antenna 300 in the antenna adjustment circuit transmits the carrier wave to the NFC card, the resonant frequency of the antenna 300 is adjusted to be consistent with the carrier frequency of the transmitted carrier wave, so as to ensure the normal operation of the antenna adjustment circuit.

It should be understood that after the NFC card receives the carrier wave, the following situations may exist:

The first case: the NFC card can drive the internal circuit of the card to work based on the energy of the received carrier wave. In this case, the card performs load modulation processing on the received carrier wave.

For ease of understanding, please refer to Figure 2, Figure 2 is one of the load modulation schematic diagrams provided by the embodiment of the present application, the waveform shown in Figure 2 is the load-modulated carrier waveform under the normal operation of the NFC card, wherein, in Figure 2 The abscissa represents the time when the drive control module 100 receives the carrier, and the ordinate represents the voltage of the carrier.

The second case: the NFC card cannot drive the internal circuit of the card to work based on the energy of the received carrier wave. In this case, the card does not perform load modulation processing on the received carrier wave.

The third case: the energy of the carrier wave received by the NFC card is insufficient. In this case, when the NFC card performs load modulation processing on the received carrier wave, the modulation depth may be insufficient, which may easily lead to transmission errors.

For ease of understanding, please refer to FIG. 3. FIG. 3 is the second schematic diagram of load modulation provided by the embodiment of the present application. FIG. 3 includes carrier waveforms with normal modulation depth and waveforms of carriers with insufficient modulation depth.

It should be understood that the technical solution is described above only by taking the application of the antenna adjustment circuit provided by this embodiment in an NFC working scene as an example. In fact, the antenna adjustment circuit provided in this embodiment can also adjust the resonant frequency of the antenna 300 at the transmitting end of the wireless charging device to improve the communication quality between the transmitting end of the wireless charging device and the receiving end of the wireless charging device; the antenna adjustment provided in this embodiment The circuit can also adjust the resonant frequency of the access control card reader antenna 300 to improve the success rate of the access control card reader's recognition of the access control card; or it can be applied to other scenarios, without any limitation here.

The antenna adjustment circuit in the embodiment of the present application includes a drive control module 100, an antenna matching circuit 200, an antenna 300, a first adjustable capacitor CA1 and a second adjustable capacitor CA2; The first port is electrically connected to the second port; the first port of the antenna 300 is electrically connected to the ground through the first adjustable capacitor CA1, and the second port of the antenna 300 is electrically connected to the ground through the second adjustable capacitor CA2; the first adjustable capacitor CA1 The adjusting end of the adjustable capacitor CA2 and the adjusting end of the second adjustable capacitor CA2 are respectively electrically connected to the drive control module 100 . In the embodiment of the present application, when the drive control module 100 in the antenna adjustment circuit receives at least one target carrier, it dynamically adjusts the capacitance values of the first adjustable capacitor CA1 and the second adjustable capacitor CA2 to dynamically adjust the antenna 300 corresponding to The resonant frequency of the electronic device antenna 300 can match the carrier frequency of the carrier wave supported by the card, thereby improving the success rate of card reading.

Optionally, the drive control module 100 includes a drive circuit 110 and an application processor 120;

The first output end of the driving circuit 110 is electrically connected to the first input end of the antenna matching circuit 200, the second output end of the driving circuit 110 is electrically connected to the second input end of the antenna matching circuit 200, The first input end of the driving circuit 110 is electrically connected to the first output end of the antenna matching circuit 200, and the second input end of the driving circuit 110 is electrically connected to the second output end of the antenna matching circuit 200;

The first output end of the application processor 120 is electrically connected to the adjustment end of the first adjustable capacitor CA1, and the second output end of the application processor 120 is electrically connected to the adjustment end of the second adjustable capacitor CA2. connected, the application processor 120 is electrically connected to the driving circuit 110 .

In this embodiment, the drive control module 100 includes a drive circuit 110 and an application processor 120. Optionally, the drive circuit 110 may be an NFC drive circuit 110, and the drive circuit 110 is used to drive the antenna matching circuit 200 and the antenna 300 to work; The above-mentioned application processor 120 is a very large scale integrated circuit that expands audio and video functions and special interfaces on the basis of a low-power processor. The above-mentioned application processor 120 is used to adjust the capacitance value of the first adjustable capacitor CA1 and the second adjustable capacitor CA1. Capacitance value of capacitor CA2.

As shown in FIG. 1 , the first output terminal of the driving circuit 110 is also called TX1, the second output terminal of the driving circuit 110 is also called TX2, the first input terminal of the driving circuit 110 is also called RX1, and the second output terminal of the driving circuit 110 is also called RX1. The second input terminal is also called RX2.

Optionally, the antenna matching circuit 200 includes a filtering subcircuit 210 and a frequency adjustment subcircuit 220;

The first input end of the filtering sub-circuit 210 is electrically connected to the first output end of the driving circuit 110, the second input end of the filtering sub-circuit 210 is electrically connected to the second output end of the driving circuit 110, The first output end of the filtering subcircuit 210 is electrically connected to the first input end of the frequency adjustment subcircuit 220, and the second output end of the filtering subcircuit 210 is connected to the second input end of the frequency adjustment subcircuit 220. Terminal connection;

The first output end of the frequency adjustment sub-circuit 220 is electrically connected to the first port of the antenna 300 , and the second output end of the frequency adjustment sub-circuit 220 is electrically connected to the second port of the antenna 300 .

In this embodiment, the antenna matching circuit 200 includes a filtering subcircuit 210 and a frequency adjustment subcircuit 220 . Wherein, the filtering sub-circuit 210 is also called a frequency selection network, and is used to filter out frequencies other than the carrier frequency sent by the drive circuit 110 ; the frequency adjustment sub-circuit 220 is used to adjust the resonant frequency of the antenna 300 .

Optionally, the filtering sub-circuit 210 includes a first inductor L1, a second inductor L2, a first capacitor C1 and a second capacitor C2;

The first end of the first inductor L1 is electrically connected to the first output end of the driving circuit 110, and the second end of the first inductor L1 is electrically connected to the first end of the first capacitor C1;

The first end of the second inductor L2 is electrically connected to the second output end of the driving circuit 110, and the second end of the second inductor L2 is electrically connected to the first end of the second capacitor C2;

The first end of the first capacitor C1 is also electrically connected to the first input end of the frequency adjustment sub-circuit 220, and the first end of the second capacitor C2 is also electrically connected to the first input end of the frequency adjustment sub-circuit 220. Terminals are electrically connected, and the second terminal of the second capacitor C2 is electrically connected to the second terminal of the first capacitor C1 to ground.

In this embodiment, the first end of the above-mentioned first inductor L1 is used as the first input end of the filter sub-circuit 210, and the first end of the above-mentioned second inductor L2 is used as the second input end of the filter sub-circuit 210; the above-mentioned first inductor L1 The node between the second end of the second inductor L2 and the first end of the first capacitor C1 is used as the first output end of the filter sub-circuit 210, and the node between the second end of the second inductor L2 and the first end of the second capacitor C2 As the second output end of the filter sub-circuit 210 .

Optionally, the frequency adjustment sub-circuit 220 includes a first resistor R1, a second resistor R2, a third capacitor C3 and a fourth capacitor C4;

The first terminal of the first resistor R1 is electrically connected to the first output terminal of the filter sub-circuit 210, and the second terminal of the first resistor R1 is electrically connected to the first terminal of the third capacitor C3, so The second end of the first resistor R1 is also electrically connected to the first port of the antenna 300;

The first end of the second resistor R2 is electrically connected to the second output end of the filter sub-circuit 210, and the second end of the second resistor R2 is electrically connected to the first end of the fourth capacitor C4, so The second end of the second resistor R2 is also electrically connected to the second port of the antenna 300;

The second end of the third capacitor C3 is electrically connected to the second end of the fourth capacitor C4.

In this embodiment, the first end of the first resistor R1 is used as the first input end of the frequency adjustment sub-circuit 220, the first end of the second resistor R2 is used as the second input end of the frequency adjustment sub-circuit 220, and the first end of the first The node between the second end of the resistor R1 and the first end of the third capacitor C3 serves as the first output end of the frequency adjustment sub-circuit 220, and the node between the second end of the second resistor R2 and the first end of the fourth capacitor C4 The node between is used as the second output end of the frequency adjustment sub-circuit 220 .

In other embodiments, the first resistor R1 and the second resistor R2 can be replaced by capacitors, and the frequency adjustment sub-circuit 220 composed of four capacitors can also adjust the resonant frequency of the antenna 300 .

Optionally, the first end of the first adjustable capacitor CA1 is electrically connected to the first end of the third capacitor C3, and the first end of the second adjustable capacitor CA2 is electrically connected to the first end of the fourth capacitor C4. The first end is electrically connected, and the second end of the first adjustable capacitor CA1 is electrically connected to the second end of the second adjustable capacitor CA2.

In this embodiment, the application processor 120 may send different voltages to the first adjustable capacitor CA1 and the second adjustable capacitor CA2, so as to adjust the capacitance values of the first adjustable capacitor CA1 and the second adjustable capacitor CA2. Specifically, the resonant frequency of the antenna 300 can be adjusted by the following formula:

Wherein, F is the resonant frequency of the antenna 300, L is the inductance of the antenna 300, and C is the sum of the capacitances between the first adjustable capacitor CA1, the second adjustable capacitor CA2, the third capacitor C3 and the fourth capacitor C4.

It should be understood that the adjusted capacitance value of the first adjustable capacitor CA1 is the same as the adjusted capacitance value of the second adjustable capacitor CA2.

Optionally, the antenna matching circuit 200 further includes a fifth capacitor C5 and a sixth capacitor C6;

The first end of the fifth capacitor C5 is electrically connected to the first input end of the driving circuit 110, and the second end of the fifth capacitor C5 is electrically connected to the first port of the antenna 300;

A first end of the sixth capacitor C6 is electrically connected to the second input end of the driving circuit 110 , and a second end of the sixth capacitor C6 is electrically connected to the second port of the antenna 300 .

In this embodiment, the first terminal of the fifth capacitor C5 serves as the first output terminal of the antenna matching circuit 200 , and the first terminal of the sixth capacitor C6 serves as the second input terminal of the antenna matching circuit 200 .

Wherein, the fifth capacitor C5 can be understood as a receiving matching capacitor of the first input terminal of the driving circuit 110 , and the sixth capacitor C6 can be understood as a receiving matching capacitor of the second input terminal of the driving circuit 110 .

The embodiment of the present application also provides a resonant frequency adjustment method, please refer to FIG. 4 , which is a flow chart of the resonant frequency adjustment method provided in the embodiment of the present application. The resonant frequency adjustment method provided in the embodiment of the present application is applied to an antenna adjustment circuit, and the antenna adjustment circuit includes a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor.

The resonant frequency adjustment method provided in the embodiment of the present application includes:

S101, in the case that the drive control module receives at least two target carriers, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor, so that the resonant frequency corresponding to the antenna is the target resonant frequency, and the target resonant frequency is the carrier frequency corresponding to the target carrier with the largest modulation depth.

The above-mentioned target carrier is a load-modulated carrier sent by the NFC card. In this embodiment, when at least two target carriers are received by the drive control module, the target carrier with the largest modulation depth among the target carriers is determined, and the carrier frequency corresponding to the target carrier is determined as the target resonance frequency.

Further, the capacitance values of the first adjustable capacitor and the second adjustable capacitor are adjusted to adjust the resonant frequency of the antenna, so that the resonant frequency corresponding to the antenna is the target resonant frequency.

In the embodiment of the present application, when the drive control module in the antenna adjustment circuit receives at least one target carrier, by adjusting the capacitance values of the first adjustable capacitor and the second adjustable capacitor, dynamically adjust the resonant frequency corresponding to the antenna, Furthermore, the carrier frequency of the carrier wave transmitted by the antenna of the electronic device matches the carrier frequency supported by the card, thereby improving the success rate of card reading.

An embodiment of the present application further provides an electronic device, where the electronic device includes the antenna adjustment circuit provided in the foregoing embodiment. Wherein, for the specific implementation manner of the antenna adjustment circuit, reference may be made to the above description, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

In the embodiment of the present application, the above-mentioned electronic equipment can be a computer (Computer), a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant, PDA), a mobile Internet electronic device (Mobile Internet Device, MID), wearable device (Wearable Device), e-reader, navigator, digital camera, etc.

The embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or an instruction, and when the program or instruction is executed by the processor, each process of the embodiment of the resonant frequency adjustment method described above is realized, and can achieve The same technical effects are not repeated here to avoid repetition.

Wherein, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer readable storage medium, such as computer read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

The embodiment of the present application also provides a chip, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to realize the various processes of the above embodiment of the resonance frequency adjustment method , and can achieve the same technical effect, in order to avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a computer program product, the computer program product is stored in a non-volatile storage medium, and the computer program product is executed by at least one processor to implement the above embodiment of the resonant frequency adjustment method. Each process can achieve the same technical effect, so in order to avoid repetition, it will not be repeated here.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

An antenna adjustment circuit, including a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor and a second adjustable capacitor;

The drive control module is electrically connected to the first port and the second port of the antenna through the antenna matching circuit;

The first port of the antenna is electrically connected to ground through the first adjustable capacitor;

The second port of the antenna is electrically connected to ground through the second adjustable capacitor;

The adjusting end of the first adjustable capacitor and the adjusting end of the second adjustable capacitor are respectively electrically connected to the drive control module;

Wherein, when the drive control module receives at least two target carriers, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor so that the resonant frequency corresponding to the antenna is the target Resonant frequency, the target resonant frequency is the carrier frequency corresponding to the target carrier with the largest load modulation depth.
The antenna adjustment circuit according to claim 1, wherein the drive control module comprises a drive circuit and an application processor;

The first output end of the driving circuit is electrically connected to the first input end of the antenna matching circuit, the second output end of the driving circuit is electrically connected to the second input end of the antenna matching circuit, and the driving circuit The first input end of the drive circuit is electrically connected to the first output end of the antenna matching circuit, and the second input end of the driving circuit is electrically connected to the second output end of the antenna matching circuit;

The first output end of the application processor is electrically connected to the adjustment end of the first adjustable capacitor, the second output end of the application processor is electrically connected to the adjustment end of the second adjustable capacitor, and the The application processor is electrically connected with the driving circuit.
The antenna adjustment circuit according to claim 2, wherein the antenna matching circuit comprises a filter subcircuit and a frequency adjustment subcircuit;

The first input end of the filtering sub-circuit is electrically connected to the first output end of the driving circuit, the second input end of the filtering sub-circuit is electrically connected to the second output end of the driving circuit, and the filtering sub-circuit The first output end of the circuit is electrically connected to the first input end of the frequency adjustment sub-circuit, and the second output end of the filtering sub-circuit is electrically connected to the second input end of the frequency adjustment sub-circuit;

The first output end of the frequency adjustment sub-circuit is electrically connected to the first port of the antenna, and the second output end of the frequency adjustment sub-circuit is electrically connected to the second port of the antenna.
The antenna adjustment circuit according to claim 3, wherein the filter sub-circuit comprises a first inductor, a second inductor, a first capacitor and a second capacitor;

The first end of the first inductance is electrically connected to the first output end of the driving circuit, and the second end of the first inductance is electrically connected to the first end of the first capacitor;

The first end of the second inductance is electrically connected to the second output end of the driving circuit, and the second end of the second inductance is electrically connected to the first end of the second capacitor;

The first end of the first capacitor is also electrically connected to the first input end of the frequency adjustment subcircuit, and the first end of the second capacitor is also electrically connected to the first input end of the frequency adjustment subcircuit, The second end of the second capacitor is electrically connected to the second end of the first capacitor with ground.
The antenna adjustment circuit according to claim 3, wherein the frequency adjustment sub-circuit comprises a first resistor, a second resistor, a third capacitor and a fourth capacitor;

The first end of the first resistor is electrically connected to the first output end of the filter sub-circuit, the second end of the first resistor is electrically connected to the first end of the third capacitor, and the first resistor The second end of the antenna is also electrically connected to the first port of the antenna;

The first end of the second resistor is electrically connected to the second output end of the filter sub-circuit, the second end of the second resistor is electrically connected to the first end of the fourth capacitor, and the second resistor The second end of the antenna is also electrically connected to the second port of the antenna;

The second end of the third capacitor is electrically connected to the second end of the fourth capacitor.
The antenna adjustment circuit according to claim 5, wherein the first end of the first adjustable capacitor is electrically connected to the first end of the third capacitor, and the first end of the second adjustable capacitor is electrically connected to the first end of the third capacitor. The first end of the fourth capacitor is electrically connected, and the second end of the first adjustable capacitor is electrically connected to the second end of the second adjustable capacitor.
The antenna adjustment circuit according to any one of claims 2-6, wherein the antenna matching circuit further includes a fifth capacitor and a sixth capacitor;

The first end of the fifth capacitor is electrically connected to the first input end of the driving circuit, and the second end of the fifth capacitor is electrically connected to the first port of the antenna;

The first end of the sixth capacitor is electrically connected to the second input end of the driving circuit, and the second end of the sixth capacitor is electrically connected to the second port of the antenna.
An electronic device, comprising the antenna adjustment circuit according to any one of claims 1-7.
A resonant frequency adjustment method, applied to the antenna adjustment circuit according to any one of claims 1-7, the antenna adjustment circuit comprising a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor and a second adjustable capacitor Capacitor adjustment;

The methods include:

When the drive control module receives at least two target carriers, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor so that the resonant frequency corresponding to the antenna is the target resonant frequency , the target resonance frequency is the carrier frequency corresponding to the target carrier with the largest modulation depth.
A readable storage medium, storing programs or instructions on the readable storage medium, wherein the steps of the resonant frequency adjustment method according to claim 9 are implemented when the programs or instructions are executed by a processor.
A chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the resonant frequency adjustment method according to claim 9 .
A computer program product, wherein the program product is stored in a non-volatile storage medium, and the program product is executed by at least one processor to implement the resonant frequency adjustment method as claimed in claim 9 .