Antenna adjustment circuit, resonance frequency adjustment method, and electronic device

Abstract

The present application provides an antenna adjustment circuit, a resonant frequency adjustment method, and an electronic device. 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 drive control module is electrically connected to a first port and a second port of the antenna through the antenna matching circuit respectively; 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; an adjustment end of the first adjustable capacitor and an adjustment end of the second adjustable capacitor are electrically connected to the drive control module respectively; wherein, when the drive 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 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 maximum load modulation depth.

Description

Technical Field

[0001] This application belongs to the technical field of antennas, and particularly relates to an antenna adjustment circuit, a resonance frequency adjustment method, and an electronic device. Background Art

[0002] With the gradual expansion of the application of Near Field Communication (NFC), more and more electronic devices support NFC technology.

[0003] In the NFC card reading scenario of an electronic device, the NFC antenna of the electronic device sends a carrier wave to the NFC card of an 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 wave frequency sent by the NFC antenna deviates significantly from the carrier wave frequency supported by the NFC card, the electronic device will not be able to read the NFC card of the external device, resulting in a card reading failure, which reduces the card reading success rate. Summary of the Invention

[0004] The purpose of the embodiments of this 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 card reading success rate.

[0005] To solve the above technical problem, this application is implemented as follows:

[0006] In a first aspect, the embodiments of this application provide an antenna adjustment circuit, which is characterized by including a drive control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor;

[0007] The drive control module is electrically connected to the first port and the second port of the antenna through the antenna matching circuit respectively;

[0008] The first port of the antenna is electrically connected to the ground through the first adjustable capacitor;

[0009] The second port of the antenna is electrically connected to the ground through the second adjustable capacitor;

[0010] The adjustment terminals of the first adjustable capacitor and the second adjustable capacitor are electrically connected to the drive control module respectively;

[0011] Wherein, when the drive control module receives at least two target carrier waves, the capacitance values of the first adjustable capacitor and the second adjustable capacitor are adjusted so that the resonance frequency corresponding to the antenna is the target resonance frequency, and the target resonance frequency is the carrier wave frequency corresponding to the target carrier wave with the maximum load modulation depth.

[0012] 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.

[0013] In a third aspect, an embodiment of the present application provides a resonant frequency adjustment method, applied to the antenna adjustment circuit as described in the first aspect. The method includes:

[0014] When the drive control module receives at least two target carriers, adjusting 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, where the target resonant frequency is the carrier frequency corresponding to the target carrier with the maximum modulation depth.

[0015] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instructions are stored. When the program or instructions are executed by a processor, the steps of the resonant frequency adjustment method as described in the third aspect are implemented.

[0016] 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 electrically connected to the first port and the second port of the antenna through the antenna matching circuit respectively; the first port of the antenna is grounded and electrically connected through the first adjustable capacitor; the second port of the antenna is grounded and electrically connected through the second adjustable capacitor; the adjustment ends of the first adjustable capacitor and the second adjustable capacitor are electrically connected to the drive control module respectively. In the embodiment of the present application, when the drive control module in the antenna adjustment circuit receives at least two target carriers, by adjusting the capacitance values of the first adjustable capacitor and the second adjustable capacitor, the resonant frequency corresponding to the antenna is dynamically adjusted, so that the carrier frequency of the carrier sent by the electronic device antenna matches the carrier frequency supported by the card, and the card reading success rate is improved. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the antenna adjustment circuit provided by the embodiment of the present application;

[0018] Figure 2 is one of the load modulation schematic diagrams provided by the embodiment of the present application;

[0019] Figure 3 is another load modulation schematic diagram provided by the embodiment of the present application;

[0020] Figure 4 is a flowchart of the resonant frequency adjustment method provided by the embodiment of the present application. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order 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 indicates an "or" relationship between the associated objects before and after.

[0023] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the antenna adjustment circuit provided by the embodiment of the present application. As Figure 1 shown, 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;

[0024] 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;

[0025] The first port of the antenna 300 is grounded and electrically connected through the first adjustable capacitor CA1;

[0026] The second port of the antenna 300 is grounded and electrically connected through the second adjustable capacitor CA2;

[0027] The adjustment ends of the first adjustable capacitor CA1 and the second adjustable capacitor CA2 are electrically connected to the drive control module 100 respectively.

[0028] The above antenna adjustment circuit can be arranged in an electronic device. When the electronic device performs a card reading operation, a carrier is sent to the NFC card through the antenna 300 in the antenna adjustment circuit. After receiving the carrier, the NFC card performs load modulation on the carrier to form a target carrier. The above target carrier is a carrier after load modulation, and the target carrier can drive the internal circuit of the card to work. Among them, the above antenna 300 can be an NFC antenna 300.

[0029] Antenna 300 in the antenna adjustment circuit receives the target carrier wave, and sends the target carrier wave to the drive control module 100 through the antenna matching circuit 200. The drive control module 100 detects the modulation depth corresponding to the target carrier wave, and takes this modulation depth as the modulation depth corresponding to the target carrier wave.

[0030] Furthermore, the resonant frequency of 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 antenna 300 is the carrier frequency corresponding to the target carrier wave with the maximum modulation depth. For the specific technical solution, please refer to the subsequent embodiments.

[0031] In this embodiment, the antenna adjustment circuit adjusts the resonant frequency of antenna 300 and the carrier frequency of the carrier wave sent by antenna 300 based on the modulation depth corresponding to the carrier wave sent by the NFC card. This way of dynamically adjusting the resonant frequency of antenna 300 can be effectively applied to the application scenario where the electronic device performs a card reading operation.

[0032] It should be understood that during the entire card reading operation process, antenna 300 will send at least two carrier waves with different carrier frequencies to the NFC card. Exemplarily, antenna 300 can first send a carrier wave with a carrier frequency of 13.26 MHz to the NFC card, and then determine the modulation depth corresponding to the carrier wave of 13.26 MHz; then send a carrier wave with a carrier frequency of 12 MHz to the NFC card, and then determine the modulation depth corresponding to the carrier wave of 12 MHz; finally send a carrier wave with a carrier frequency of 17 MHz to the NFC card, and then determine the modulation depth corresponding to the carrier wave of 17 MHz. In this way, the carrier wave with the maximum modulation depth is determined, and the resonant frequency of antenna 300 is adjusted to the carrier frequency corresponding to the carrier wave with the maximum modulation depth.

[0033] It should be understood that while antenna 300 in the antenna adjustment circuit sends a carrier wave to the NFC card, the resonant frequency of antenna 300 is adjusted to be the same as the carrier frequency of the sent carrier wave, so as to ensure the normal operation of the antenna adjustment circuit.

[0034] It should be understood that after the NFC card receives the carrier wave, the following several situations may occur:

[0035] The first situation: 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.

[0036] For easy understanding, please refer to Figure 2 , Figure 2 which is one of the load modulation schematic diagrams provided by the embodiments of the present application, Figure 2 The shown waveform is the carrier wave waveform after load modulation under the normal operation of the NFC card. Among them, Figure 2The abscissa in it represents the time when the drive control module 100 receives the carrier wave, and the ordinate represents the voltage of the carrier wave.

[0037] 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.

[0038] 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.

[0039] For ease of understanding, please refer to Figure 3 , Figure 3 which is the second schematic diagram of load modulation provided by the embodiment of the present application, Figure 3 including a carrier wave waveform with a normal modulation depth and a waveform of a carrier wave with an insufficient modulation depth.

[0040] It should be understood that the above only takes the antenna adjustment circuit provided by this embodiment applied to the NFC working scenario as an example to elaborate the technical solution. In fact, the antenna adjustment circuit provided by this embodiment can also adjust the resonant frequency of the transmitting antenna 300 of the wireless charging device to improve the communication quality between the transmitting end and the receiving end of the wireless charging device; the antenna adjustment circuit provided by this embodiment can also adjust the resonant frequency of the access control reader antenna 300 to improve the recognition success rate of the access control reader for the access control card; or be applied to other scenarios, which are not limited here.

[0041] 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 drive control module 100 is electrically connected to the first port and the second port of the antenna 300 through the antenna matching circuit 200; 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 adjustment ends of the first adjustable capacitor CA1 and 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 wave, by adjusting the capacitance values of the first adjustable capacitor CA1 and the second adjustable capacitor CA2, the resonant frequency corresponding to the antenna 300 is dynamically adjusted, so that the carrier wave frequency of the carrier wave transmitted by the antenna 300 of the electronic device matches the carrier wave frequency supported by the card, and the card reading success rate is improved.

[0042] Optionally, the drive control module 100 includes a drive circuit 110 and an application processor 120;

[0043] The first output terminal of the driving circuit 110 is electrically connected to the first input terminal of the antenna matching circuit 200, the second output terminal of the driving circuit 110 is electrically connected to the second input terminal of the antenna matching circuit 200, the first input terminal of the driving circuit 110 is electrically connected to the first output terminal of the antenna matching circuit 200, and the second input terminal of the driving circuit 110 is electrically connected to the second output terminal of the antenna matching circuit 200;

[0044] The first output terminal of the application processor 120 is electrically connected to the adjustment terminal of the first adjustable capacitor CA1, the second output terminal of the application processor 120 is electrically connected to the adjustment terminal of the second adjustable capacitor CA2, and the application processor 120 is electrically connected to the driving circuit 110.

[0045] In this embodiment, the drive control module 100 includes a driving circuit 110 and an application processor 120. Optionally, the above driving circuit 110 may be an NFC driving circuit 110, and the above driving circuit 110 is used to drive the antenna matching circuit 200 and the antenna 300 to work; the above application processor 120 is a very large scale integrated circuit that expands audio and video functions and dedicated interfaces on the basis of a low-power processor, and the above application processor 120 is used to adjust the capacitance values of the first adjustable capacitor CA1 and the second adjustable capacitor CA2.

[0046] As Figure 1 shown, 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 input terminal of the driving circuit 110 is also called RX2.

[0047] Optionally, the antenna matching circuit 200 includes a filtering sub-circuit 210 and a frequency adjustment sub-circuit 220;

[0048] The first input terminal of the filtering sub-circuit 210 is electrically connected to the first output terminal of the driving circuit 110, the second input terminal of the filtering sub-circuit 210 is electrically connected to the second output terminal of the driving circuit 110, the first output terminal of the filtering sub-circuit 210 is electrically connected to the first input terminal of the frequency adjustment sub-circuit 220, and the second output terminal of the filtering sub-circuit 210 is electrically connected to the second input terminal of the frequency adjustment sub-circuit 220;

[0049] The first output terminal of the frequency adjustment sub-circuit 220 is electrically connected to the first port of the antenna 300, and the second output terminal of the frequency adjustment sub-circuit 220 is electrically connected to the second port of the antenna 300.

[0050] In this embodiment, the above antenna matching circuit 200 includes a filtering sub-circuit 210 and a frequency adjustment sub-circuit 220. Among them, the above filtering sub-circuit 210, also known as a frequency selection network, is used to filter out other frequencies except the carrier frequency sent by the driving circuit 110; the above frequency adjustment sub-circuit 220 is used to adjust the resonant frequency of the antenna 300.

[0051] Optionally, the filtering sub-circuit 210 includes a first inductor L1, a second inductor L2, a first capacitor C1, and a second capacitor C2;

[0052] 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;

[0053] 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;

[0054] The first end of the first capacitor C1 is also electrically connected to the first input end of the frequency adjustment sub-circuit 220, the first end of the second capacitor C2 is also electrically connected to the first input end of the frequency adjustment sub-circuit 220, and the second end of the second capacitor C2 is grounded and electrically connected to the second end of the first capacitor C1.

[0055] In this embodiment, the first end of the first inductor L1 serves as the first input end of the filtering sub-circuit 210, and the first end of the second inductor L2 serves as the second input end of the filtering sub-circuit 210; the node between the second end of the first inductor L1 and the first end of the first capacitor C1 serves as the first output end of the filtering sub-circuit 210, and the node between the second end of the second inductor L2 and the first end of the second capacitor C2 serves as the second output end of the filtering sub-circuit 210.

[0056] 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;

[0057] The first end of the first resistor R1 is electrically connected to the first output end of the filtering sub-circuit 210, the second end of the first resistor R1 is electrically connected to the first end of the third capacitor C3, and the second end of the first resistor R1 is also electrically connected to the first port of the antenna 300;

[0058] The first end of the second resistor R2 is electrically connected to the second output end of the filtering sub-circuit 210, the second end of the second resistor R2 is electrically connected to the first end of the fourth capacitor C4, and the second end of the second resistor R2 is also electrically connected to the second port of the antenna 300;

[0059] The second terminal of the third capacitor C3 is electrically connected to the second terminal of the fourth capacitor C4.

[0060] In this embodiment, the first terminal of the first resistor R1 serves as the first input terminal of the frequency adjustment sub-circuit 220, the first terminal of the second resistor R2 serves as the second input terminal of the frequency adjustment sub-circuit 220, the node between the second terminal of the first resistor R1 and the first terminal of the third capacitor C3 serves as the first output terminal of the frequency adjustment sub-circuit 220, and the node between the second terminal of the second resistor R2 and the first terminal of the fourth capacitor C4 serves as the second output terminal of the frequency adjustment sub-circuit 220.

[0061] In other embodiments, the first resistor R1 and the second resistor R2 can be replaced with capacitors, and the frequency adjustment sub-circuit 220 composed of 4 capacitors can also adjust the resonant frequency of the antenna 300.

[0062] Optionally, the first terminal of the first adjustable capacitor CA1 is electrically connected to the first terminal of the third capacitor C3, the first terminal of the second adjustable capacitor CA2 is electrically connected to the first terminal of the fourth capacitor C4, and the second terminal of the first adjustable capacitor CA1 is electrically connected to the second terminal of the second adjustable capacitor CA2.

[0063] In this embodiment, the application processor 120 can send different voltages to the first adjustable capacitor CA1 and the second adjustable capacitor CA2 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:

[0064]

[0065] Where F is the resonant frequency of the antenna 300, L is the inductance value of the antenna 300, and C is the sum of the capacitance values among the first adjustable capacitor CA1, the second adjustable capacitor CA2, the third capacitor C3, and the fourth capacitor C4.

[0066] It should be understood that the capacitance value of the adjusted first adjustable capacitor CA1 is the same as the capacitance value of the adjusted second adjustable capacitor CA2.

[0067] Optionally, the antenna matching circuit 200 further includes a fifth capacitor C5 and a sixth capacitor C6;

[0068] The first terminal of the fifth capacitor C5 is electrically connected to the first input terminal of the drive circuit 110, and the second terminal of the fifth capacitor C5 is electrically connected to the first port of the antenna 300;

[0069] The first terminal of the sixth capacitor C6 is electrically connected to the second input terminal of the drive circuit 110, and the second terminal of the sixth capacitor C6 is electrically connected to the second port of the antenna 300.

[0070] 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.

[0071] Among them, the above-mentioned fifth capacitor C5 can be understood as the reception matching capacitor at the first input terminal of the driving circuit 110, and the above-mentioned sixth capacitor C6 can be understood as the reception matching capacitor at the second input terminal of the driving circuit 110.

[0072] The embodiment of the present application also provides a resonant frequency adjustment method. Please refer to Figure 4 , Figure 4 which is the flowchart of the resonant frequency adjustment method provided by the embodiment of the present application. The resonant frequency adjustment method provided by the embodiment of the present application is applied to an antenna adjustment circuit, and the antenna adjustment circuit includes a driving control module, an antenna matching circuit, an antenna, a first adjustable capacitor, and a second adjustable capacitor.

[0073] The resonant frequency adjustment method provided by the embodiment of the present application includes:

[0074] S101, when the driving 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 maximum modulation depth.

[0075] The above-mentioned target carriers are carriers modulated by the NFC card through load modulation. In this embodiment, when the driving control module receives at least two target carriers, determine the target carrier with the maximum modulation depth among the target carriers, and determine the carrier frequency corresponding to the target carrier as the target resonant frequency.

[0076] Further, adjust the capacitance values of the first adjustable capacitor and the second adjustable capacitor to adjust the resonant frequency of the antenna so that the resonant frequency corresponding to the antenna is the target resonant frequency.

[0077] In the embodiment of the present application, when the driving 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, so that the carrier frequency of the carrier sent by the antenna of the electronic device matches the carrier frequency supported by the card, and improve the card reading success rate.

[0078] The embodiment of the present application also provides an electronic device, and the electronic device includes the antenna adjustment circuit provided in the above embodiment. Among them, the specific implementation manner of the antenna adjustment circuit can refer to the above description and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0079] In the embodiments of the present application, the above-mentioned electronic device may be a computer, a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA for short), a mobile Internet device (MID), a wearable device, an e-reader, a navigator, a digital camera, etc.

[0080] The embodiments of the present application further provide a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the resonance frequency adjustment method is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described in detail here.

[0081] Wherein, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc.

[0082] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. An antenna adjustment circuit, characterized in that, It 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 electrically connected to the first port and the second port of the antenna through the antenna matching circuit respectively; The first port of the antenna is grounded and electrically connected through the first adjustable capacitor; The second port of the antenna is grounded and electrically connected through the second adjustable capacitor; The adjustment ends of the first adjustable capacitor and the second adjustable capacitor are electrically connected to the drive control module respectively; Wherein, when the drive 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 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 maximum load modulation depth; The drive control module includes a drive circuit and an application processor; The first output end of the drive circuit is electrically connected to the first input end of the antenna matching circuit, the second output end of the drive circuit is electrically connected to the second input end of the antenna matching 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 drive 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 application processor is electrically connected to the drive circuit; 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 drive 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 drive circuit, and the second end of the sixth capacitor is electrically connected to the second port of the antenna.

2. The antenna adjustment circuit according to claim 1, characterized in that The antenna matching circuit includes a filtering sub-circuit and a frequency adjustment sub-circuit; The first input end of the filtering sub-circuit is electrically connected to the first output end of the drive circuit, the second input end of the filtering sub-circuit is electrically connected to the second output end of the drive circuit, the first output end of the filtering sub-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.

3. The antenna adjustment circuit according to claim 2, wherein The filtering sub-circuit includes a first inductor, a second inductor, a first capacitor, and a second capacitor; The first end of the first inductor is electrically connected to the first output end of the drive circuit, and the second end of the first inductor is electrically connected to the first end of the first capacitor; The first end of the second inductor is electrically connected to the second output end of the drive circuit, and the second end of the second inductor 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 sub-circuit. The first end of the second capacitor is also electrically connected to the first input end of the frequency adjustment sub-circuit. The second end of the second capacitor is grounded and electrically connected to the second end of the first capacitor.

4. The antenna adjustment circuit according to claim 2, wherein The frequency adjustment sub-circuit includes 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 filtering sub-circuit. The second end of the first resistor is electrically connected to the first end of the third capacitor. The second end of the first resistor 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 filtering sub-circuit. The second end of the second resistor is electrically connected to the first end of the fourth capacitor. The second end of the second resistor 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.

5. The antenna adjustment circuit according to claim 4, wherein The first end of the first adjustable capacitor is electrically connected to the first end of the third capacitor. The first end of the second adjustable capacitor is electrically connected to the first end of the fourth capacitor. The second end of the first adjustable capacitor is electrically connected to the second end of the second adjustable capacitor.

6. An electronic device, characterized in that, The electronic device includes the antenna adjustment circuit according to any one of claims 1-5.

7. A method for adjusting a resonance frequency, characterized in that, Applied to the antenna adjustment circuit according to any one of claims 1-5, 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 method includes: When the drive control module receives at least two target carriers, adjusting 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 maximum modulation depth.

8. A readable storage medium, characterized in that, The program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, the steps of the resonant frequency adjustment method according to claim 7 are implemented.

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