Antenna matching circuits, filtering methods, devices, electronic equipment, media and products

Abstract

This application provides an antenna matching circuit, filtering method, apparatus, electronic device, medium, and product. The antenna matching circuit includes: a processing unit, configured to determine the frequency range of the electromagnetic waves acquired by the antenna, and when the frequency range includes an interference frequency band, send a first control signal to the control terminal of a first switch; the first switch includes a control terminal, an input terminal, and at least one output terminal, the input terminal of the first switch being connected to the main circuit of the matching circuit, and the output terminal of the first switch being connected to the input terminal of the corresponding filtering module; the control terminal of the first switch is connected to the processing unit, configured to, upon receiving the first control signal, parse the first control signal to obtain the identification information of the target filtering module, and activate the target filtering module, which can effectively improve antenna isolation and overall performance, thereby improving antenna radiation efficiency and communication quality.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna matching circuit, filtering method, device, electronic equipment, medium and product. Background Technology

[0002] With the rapid development of wireless communication technology, especially the widespread application of 5G technology, mobile terminal devices need to support more communication frequency bands and higher data transmission rates. To meet these needs, modern mobile terminal devices, such as smartphones, are typically equipped with multiple antennas to achieve functions such as Multiple-Input Multiple-Output (MIMO) technology and carrier aggregation.

[0003] However, the increase in the number of antennas leads to increasingly limited internal space in equipment, and the physical distance between antennas is constantly decreasing. When the antenna spacing is too close, it can cause severe electromagnetic coupling effects, resulting in reduced isolation between antennas. For example, when adjacent antennas operate in the same or similar frequency bands, unnecessary resonance phenomena will occur, forming co-channel interference. Co-channel interference will significantly reduce the antenna's radiation efficiency, gain, and signal-to-noise ratio, leading to a decline in overall communication performance. Summary of the Invention

[0004] This application provides an antenna matching circuit, filtering method, apparatus, electronic device, medium, and product to improve the isolation between antennas, thereby improving the overall communication performance.

[0005] In a first aspect, embodiments of this application provide an antenna matching circuit, the circuit comprising:

[0006] The processing unit is used to determine the frequency band range of the electromagnetic waves acquired by the antenna, and when the frequency band range includes the interference frequency band, to send a first control signal to the control terminal of the first switch;

[0007] A first switch includes a control terminal, an input terminal, and at least one output terminal, with each output terminal corresponding to at least one filtering module. The input terminal of the first switch is connected to the main circuit of the matching circuit, and the output terminal of the first switch is connected to the input terminal of the corresponding filtering module. The control terminal of the first switch is connected to the processing unit and is used to parse the first control signal after receiving it, obtain the identification information of the target filtering module, and turn on the target filtering module. The target filtering module is determined based on the interference frequency band.

[0008] At least one filtering module, the output terminals of which are all grounded, and the filtering module is used to filter out electromagnetic waves in the interference frequency band, either alone or in conjunction with other filtering modules.

[0009] Optionally, the target filtering module includes: an inductor coil, and / or a capacitor, wherein the inductance of the inductor coil and the capacitance of the capacitor are determined according to the interference frequency band.

[0010] Optionally, the target filtering module is a series resonant circuit consisting of an inductor and a capacitor connected in series, wherein the resonant frequency of the series resonant circuit is the same as the frequency of the interference band.

[0011] Optionally, the filtering module includes a tunable capacitor element; the control terminal of the tunable capacitor element is connected to the output terminal of the first switch; the first control signal includes a target control voltage, which is determined according to the interference frequency band;

[0012] The first switch is also used to provide the target control voltage to the control terminal of the tunable capacitor element to adjust the capacitance value of the tunable capacitor element to the target capacitance value;

[0013] When the capacitance value of the tunable capacitor element is the target capacitance value, the filtering module is used to filter out electromagnetic waves in the interference frequency band.

[0014] Optionally, the first switch is a MIPI switch.

[0015] Secondly, embodiments of this application provide a filtering method that utilizes the processing unit in the antenna matching circuit described in the first aspect, the method comprising:

[0016] Determine the frequency range of the electromagnetic waves acquired by the antenna;

[0017] When the frequency band includes the interference frequency band, a first control signal is sent to the control terminal of the first switch; so that after receiving the first control signal, the control terminal of the first switch parses the first control signal to obtain the identification information of the target filtering module, and turns on the target filtering module, wherein the target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves of the interference frequency band alone or in conjunction with other filtering modules.

[0018] Thirdly, embodiments of this application provide a processing unit, the processing unit comprising:

[0019] The determination module is used to determine the frequency band range of the electromagnetic waves acquired by the antenna;

[0020] The transmitting module is configured to send a first control signal to the control terminal of the first switch when the frequency band range includes the interference frequency band; so that the control terminal of the first switch, upon receiving the first control signal, parses the first control signal to obtain the identification information of the target filtering module and turns on the target filtering module, wherein the target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves of the interference frequency band alone or in conjunction with other filtering modules.

[0021] Fourthly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0022] The memory stores computer-executed instructions;

[0023] The processor executes computer execution instructions stored in the memory, causing the processor to perform possible implementations as described in the second aspect above.

[0024] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement various possible implementations as described in the second aspect above.

[0025] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements various possible implementations as described in the second aspect above.

[0026] The antenna matching circuit, filtering method, device, electronic device, medium, and product provided in this application embodiment include: an antenna matching circuit comprising: a processing unit, configured to determine the frequency band range of the electromagnetic waves acquired by the antenna, and when the frequency band range includes an interference frequency band, send a first control signal to the control terminal of a first switch; a first switch, the first switch including a control terminal, an input terminal, and at least one output terminal, the at least one output terminal corresponding one-to-one with at least one filtering module; the input terminal of the first switch being connected to the main circuit of the matching circuit, and the output terminal of the first switch being connected to the input terminal of the corresponding filtering module; the control terminal of the first switch being connected to the processing unit, configured to, upon receiving the... After the first control signal is received, the first control signal is parsed to obtain the identification information of the target filtering module, and the target filtering module is turned on. The target filtering module is determined according to the interference frequency band. There is at least one filtering module, and the output terminals of the filtering modules are all grounded. The filtering modules are used to filter out electromagnetic waves in the interference frequency band individually or in combination with other filtering modules. By introducing switchable filtering modules in the main circuit, the dynamic reconfigurability of the antenna matching circuit is realized. It can automatically select the optimal filtering scheme according to the actual interference situation, dynamically filter out co-channel interference generated by adjacent antennas, effectively improve antenna isolation and overall performance, and thus improve the antenna radiation efficiency and communication quality. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 An application scenario diagram provided for an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of an antenna matching circuit provided in an embodiment of this application;

[0030] Figure 3 A flowchart illustrating a filtering method provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of another antenna matching circuit provided in an embodiment of this application;

[0032] Figure 5 A waveform diagram provided for an embodiment of this application;

[0033] Figure 6 Another waveform diagram provided for an embodiment of this application;

[0034] Figure 7 A schematic diagram of a tablet computer provided for an embodiment of this application;

[0035] Figure 8 A waveform diagram of antenna 1 provided in an embodiment of this application;

[0036] Figure 9 A waveform diagram of antenna 2 provided in an embodiment of this application;

[0037] Figure 10 A waveform diagram of mutual interference between antenna 1 and antenna 2 provided for an embodiment of this application;

[0038] Figure 11 A waveform diagram of antenna 1 after adding filtering matching is provided in an embodiment of this application;

[0039] Figure 12 A waveform diagram of antenna 2 after adding filtering matching is provided in an embodiment of this application;

[0040] Figure 13 This application provides a waveform diagram of mutual interference between antenna 1 and antenna 2 after adding filter matching in an embodiment of the present application;

[0041] Figure 14 A schematic diagram of the structure of a processing unit provided in this application;

[0042] Figure 15 A schematic diagram of the structure of the electronic device provided in this application.

[0043] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0045] With the rapid development of wireless communication technology, especially the widespread application of 5G technology, mobile terminal devices need to support more communication frequency bands and higher data transmission rates. 5G not only introduces the Sub-6 GHz band but also extends to the millimeter-wave band, and can be compatible with multiple generations of communication standards from 2G to 4G. Therefore, the number of frequency bands that a single device needs to cover has increased significantly. Furthermore, to meet the needs of applications requiring high throughput and low latency, such as ultra-high-definition video transmission, real-time cloud interaction, the Internet of Things (IoT), and vehicle-to-everything (V2X) communication, key supporting technologies for modern communication systems include multiple-input multiple-output (MIMO) technology and carrier aggregation. Modern mobile terminal devices, such as smartphones, tablets, and portable routers, typically need to be equipped with multiple antennas to achieve parallel data transmission within the same or different frequency bands, thereby improving system capacity and spectrum utilization efficiency.

[0046] However, the increase in the number of antennas also brings many challenges. As mobile terminals continue to develop towards higher screen-to-body ratios, thinner and lighter designs, and multi-functional integration, the internal space of devices is becoming increasingly limited. The clearance area left for antennas is constantly being compressed, and the physical distance between antennas is constantly decreasing. When the antenna spacing is too close, the energy between each antenna element will affect each other through near-field coupling, resulting in a significant reduction in the isolation between antennas. Especially when adjacent antennas operate in the same or similar frequency bands, this coupling will further excite unnecessary resonance phenomena, forming co-channel interference or adjacent-channel interference. Co-channel interference will significantly reduce the antenna's radiation efficiency, gain, and signal-to-noise ratio, leading to a decline in overall communication performance.

[0047] In view of this, this application provides an antenna matching circuit, which includes: a processing unit, a first switch, and at least one filtering module. The processing switch is used to determine the frequency range of the electromagnetic waves acquired by the antenna, and when the frequency range includes an interference frequency band, it sends a first control signal to the control terminal of the first switch. The first switch includes a control terminal, an input terminal, and at least one output terminal, with each output terminal corresponding to at least one filtering module. The input terminal of the first switch is connected to the main circuit of the matching circuit, and the output terminal of the first switch is connected to the input terminal of the corresponding filtering module. The control terminal of the first switch is connected to the processing unit, and is used to parse the first control signal after receiving it to obtain the identification information of the target filtering module, and to turn on the target filtering module. The target filtering module is determined based on the interference frequency band. The output terminal of any of the at least one filtering module is grounded, and the filtering module is used to filter out electromagnetic waves in the interference frequency band individually or in conjunction with other filtering modules. By introducing a switchable filtering module into the main circuit, the antenna matching circuit is dynamically reconfigurable. It can automatically select the optimal filtering scheme according to the actual interference situation, dynamically filter out co-channel interference generated by adjacent antennas, effectively improve antenna isolation and overall performance, and thus improve antenna radiation efficiency and communication quality.

[0048] Figure 1 An application scenario diagram provided for an embodiment of this application, such as... Figure 1 As shown, the first switch has a control terminal, an input terminal, and at least one output terminal. The at least one output terminal is output terminal 1, output terminal 2, and output terminal 3. The control terminal of the first switch is connected to the processing unit, the input terminal of the first switch is connected to the main circuit of the antenna matching circuit, and the at least one output terminal corresponds to at least one filter module. The at least one filter module includes filter module 1, filter module 2, and filter module 3. Output terminal 1 is connected to the input terminal of filter module 1, output terminal 2 is connected to the input terminal of filter module 2, and output terminal 3 is connected to the input terminal of filter module 3. The output terminals of filter modules 1, 2, and 3 are all grounded.

[0049] The processing unit can determine the frequency range of the electromagnetic waves acquired by the antenna. When the frequency range includes interference frequency band 1, it sends a first control signal to the control terminal of the first switch. For example, if filtering module 1 and filtering module 2 can filter out interference frequency band 1, the first control signal will include the identification information of filtering module 1 and filtering module 2. After receiving the first control signal, the first switch parses the first control signal to obtain the identification information of filtering module 1 and filtering module 2, and then turns on filtering module 1 and filtering module 2 to achieve the filtering out of electromagnetic waves in interference frequency band 1.

[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0051] Figure 2 This is a schematic diagram of an antenna matching circuit provided in an embodiment of this application, as shown below. Figure 2 As shown in the embodiment of this application, an antenna matching circuit may include:

[0052] The processing unit is used to determine the frequency range of the electromagnetic waves acquired by the antenna, and when the frequency range includes the interference frequency band, to send a first control signal to the control terminal of the first switch;

[0053] The first switch includes a control terminal, an input terminal, and at least one output terminal, with each output terminal corresponding to at least one filter module. The input terminal of the first switch is connected to the main circuit of the matching circuit, and the output terminal of the first switch is connected to the input terminal of the corresponding filter module. The control terminal of the first switch is connected to a processing unit, which, upon receiving a first control signal, analyzes the first control signal to obtain the identification information of the target filter module and activates the target filter module. The target filter module is determined based on the interference frequency band.

[0054] At least one filter module is provided, and the output terminals of the filter modules are all grounded. The filter modules are used to filter out electromagnetic waves in the interference frequency band, either alone or in conjunction with other filter modules.

[0055] The processing unit refers to the hardware circuit or processor that can perform logical operations and control functions, such as microcontrollers and baseband processors.

[0056] The frequency range of electromagnetic waves refers to the frequency interval in which the antenna receives electromagnetic signals.

[0057] Interference bands refer to the frequency range in which co-channel interference occurs due to the operation of adjacent antennas.

[0058] The first switch is an electronic switching device with one control terminal, one input terminal, and multiple output terminals.

[0059] A filter module is a circuit composed of components such as inductors and capacitors, used alone or in conjunction with other filter modules to filter out interference signals of a specific frequency.

[0060] The main path of the antenna matching circuit refers to the main signal transmission path between the antenna and the RF front end.

[0061] For example, each antenna has a corresponding operating frequency range. For instance, the operating range of antenna 1 is [2300MHz, 2690MHz], and the frequency range of the electromagnetic waves acquired by antenna 1 is [2000MHz, 2690MHz]. Then the interference frequency band is [2000MHz, 2300MHz]. The processing unit can determine the filtering module that filters out the interference frequency band [2000MHz, 2300MHz] as filtering module 1 according to the first mapping relationship table. The first mapping relationship table is used to indicate the correspondence between each interference frequency band and the filtering module.

[0062] The processing unit sends the first control signal to the control terminal of the first switch. The first control signal contains the identification information of the filter module 1. After receiving the first control signal, the first switch parses the first control signal to obtain the identification information corresponding to the filter module 1, and connects the corresponding output terminal of the filter module 1 to the input terminal of the filter module 1, so that the filter module 1 is connected to the main circuit of the antenna matching circuit to specifically filter out the interference frequency band [2000MHz, 2300MHz].

[0063] The antenna matching circuit provided in this application includes: a processing unit, used to determine the frequency band range of the electromagnetic waves acquired by the antenna, and when the frequency band range includes the interference frequency band, to send a first control signal to the control terminal of a first switch; a first switch, the first switch including a control terminal, an input terminal and at least one output terminal, the at least one output terminal corresponding to at least one filter module; the input terminal of the first switch is connected to the main circuit of the matching circuit, and the output terminal of the first switch is connected to the input terminal of the corresponding filter module; the control terminal of the first switch is connected to the processing unit, used to parse the first control signal after receiving it, obtain the identification information of the target filter module, and turn on the target filter module; wherein, the target filter module is determined according to the interference frequency band; at least one filter module, the output terminals of the filter modules are all grounded, the filter modules are used to filter out electromagnetic waves in the interference frequency band individually or in conjunction with other filter modules, by introducing switchable filter modules in the main circuit, the dynamic reconfigurability of the antenna matching circuit is realized, which can automatically select the optimal filtering scheme according to the actual interference situation, dynamically filter out co-channel interference generated by adjacent antennas, effectively improve antenna isolation and overall performance, and thus improve the antenna radiation efficiency and communication quality.

[0064] Optionally, the target filtering module includes: an inductor coil, and / or a capacitor, wherein the inductance of the inductor coil and the capacitance of the capacitor are determined according to the interference frequency band.

[0065] The target filtering module may include only an inductor, only a capacitor, or both an inductor and a capacitor.

[0066] The target filtering module can be one or more, and the inductance of the inductor coil and the capacitance of the capacitor in the target filtering module are determined according to the interference frequency band. This application does not limit the specific method for determining the inductance of the inductor coil and the capacitance of the capacitor. For example, it can be determined experimentally. If the frequency range of the electromagnetic waves received by the antenna includes the interference frequency band, then the target filtering module is connected, and the inductance of the inductor coil and the capacitance of the capacitor in the target filtering module are adjusted until the interference frequency band is filtered out.

[0067] In this way, by customizing the filtering characteristics based on the known interference frequency bands, and by adjusting the values ​​of L and C, the frequency band with the greatest filter attenuation can be precisely aligned with the interference frequency band. This can filter out or weaken useless signals on that frequency band to the maximum extent, while allowing useful signals in the working frequency band to pass through smoothly. This can directly improve call quality, reduce the data error rate, and thus improve the overall communication performance.

[0068] Optionally, the target filtering module is a series resonant circuit consisting of an inductor and a capacitor connected in series, wherein the resonant frequency of the series resonant circuit is the same as the frequency of the interference band.

[0069] The target filter module is a series resonant circuit consisting of an inductor and a capacitor connected in series. The resonant frequency of the series resonant circuit is the same as the frequency of the interference band.

[0070] For interference frequency bands, the impedance of the LC series circuit is extremely low, almost a short circuit. When the interference signal at that frequency reaches the antenna feed point, it will be attracted by this low impedance path and effectively diverted to the radio frequency ground, and will not be able to continue to enter the sensitive circuit of the main signal path.

[0071] In this way, the series resonant circuit provides extremely low impedance at its resonant point, thus its attenuation effect on the target interference frequency band is very strong and significant.

[0072] Optionally, the filtering module includes a tunable capacitor element; the control terminal of the tunable capacitor element is connected to the output terminal of the first switch; the first control signal includes a target control voltage, which is determined according to the interference frequency band;

[0073] The first switch is also used to provide a target control voltage to the control terminal of the tunable capacitor element in order to adjust the capacitance value of the tunable capacitor element to the target capacitance value.

[0074] When the capacitance value of the tunable capacitor element is the target capacitance value, the filtering module is used to filter out electromagnetic waves in the interference frequency band.

[0075] Specifically, when the processing unit determines that the frequency range of the electromagnetic waves acquired by the antenna includes the interference frequency band, it sends a first control signal to the control terminal of the first switch. The first control signal includes the identification information of the target filtering module and the target control voltage.

[0076] After receiving the first control signal, the first switch parses the first control signal to obtain the identification information corresponding to the target filtering module and the target control voltage. Based on the identification information corresponding to the target filtering module, the switch determines the tunable capacitor element and adjusts the voltage of the tunable capacitor element to the target control voltage so that the capacitance value of the tunable capacitor element is adjusted to the target capacitance value.

[0077] Then, the input terminal of the target filter module is connected to the output terminal of the corresponding first switch, at which point the target filter module can filter out electromagnetic waves in the interference frequency band.

[0078] In this way, one adjustable filter module can replace multiple fixed LC filter circuits, which can greatly save circuit board space and material costs, and achieve filtering of various interference frequency bands.

[0079] Optionally, the first switch is a MIPI switch.

[0080] A MIPI (Mobile Industry Processor Interface) switch is an electronic switch that controls its state in accordance with the digital interface standards developed by the MIPI Alliance.

[0081] Figure 3 This is a flowchart illustrating a filtering method provided in an embodiment of this application. The execution entity in this embodiment can be the processing unit in the antenna matching circuit of the above embodiments, such as... Figure 3 As shown in the embodiments of this application, a filtering method may include:

[0082] Step 301: Determine the frequency range of the electromagnetic waves acquired by the antenna;

[0083] Step 302: When the frequency band includes the interference frequency band, send a first control signal to the control terminal of the first switch; so that after receiving the first control signal, the control terminal of the first switch analyzes the first control signal to obtain the identification information of the target filtering module, and turns on the target filtering module. The target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves in the interference frequency band alone or in combination with other filtering modules.

[0084] The filtering method provided in this application has a similar implementation principle and technical effect to the above embodiments, and will not be described again in this embodiment.

[0085] Figure 4This is a schematic diagram of another antenna matching circuit provided in an embodiment of this application. The parallel switch in the diagram corresponds to the first switch in this application. RF1, RF2, RF3, and RF4 all correspond to the filtering modules in this application. The input terminal of the parallel switch is connected to the main circuit of the antenna matching circuit. The parallel switch includes four output terminals: the first output terminal is connected to the input terminal of RF1, the second output terminal is connected to the input terminal of RF2, the third output terminal is connected to the input terminal of RF3, and the fourth output terminal is connected to the input terminal of RF4. The output terminals of RF1, RF2, RF3, and RF4 are all grounded. The type of parallel switch can be selected according to the actual debugging situation. RF1, RF2, RF3, and RF4 are used to filter out interference resonances in the same frequency band of adjacent antennas, thereby improving antenna isolation and enhancing antenna performance.

[0086] Figure 5 A waveform diagram provided for an embodiment of this application, such as Figure 5 As shown, the horizontal axis of the waveform graph corresponds to the operating frequency band, and the vertical axis corresponds to the isolation. Figure 5 Tr1 in the diagram represents the waveform of antenna 1, and Tr2 represents the waveform of antenna 2. Antennas 1 and 2 are close together and their frequency bands overlap. As can be seen from the cross-interference diagram Tr3, the isolation at 2.4 GHz is -10.0 dB, and the isolation at 2.5 GHz is -11.4 dB, which is very poor.

[0087] Figure 6 Another waveform diagram provided in this application embodiment. Figure 6 When the analog antenna 2 is working, the first switch in the antenna matching circuit of antenna 1 turns on a filter module, which filters out the resonance of antenna 1. From the cross-interference diagram Tr3, it can be seen that the isolation at a frequency of 2.4GHz is -19.4dB and the isolation at a frequency of 2.5GHz is -21dB, which is very poor.

[0088] Figure 7 A schematic diagram of a tablet computer provided in an embodiment of this application. Figure 7 Antenna 1 and Antenna 2 overlap in the frequency range of 2300MHz-2690MHz.

[0089] Antenna 1 and Antenna 2 are relatively close together. Figure 8 This application provides a waveform diagram of an antenna 1 according to an embodiment. Figure 9 This application provides a waveform diagram of antenna 2 as an embodiment. Figure 10 This application provides a waveform diagram of mutual interference between antenna 1 and antenna 2. Figure 10 The effect of the first switch not introduced in this application can be seen from the fact that antenna 1 and antenna 2 both resonate at a frequency of 2300-2690MHz, resulting in an isolation of about -10dB.

[0090] By adding a first switch to the main circuit of the antenna matching circuit and incorporating a filter module for matching, the isolation is significantly improved.

[0091] The specific implementation is as follows:

[0092] With the main circuit switch off, adjust antennas 1 and 2 to their corresponding resonances within the specified frequency range as required. Start the parallel switch on the main circuit of antenna 1's antenna matching circuit. Use a large capacitor (2pF in this application; different capacitor and inductance values ​​will be used depending on the frequency band) to conduct RF1. Adjust the overlapping resonances in the waveforms of antennas 1 and 2 until they disappear, and observe the isolation between the antennas at this point. Based on the adjustment results, verify the active function until it meets the standard.

[0093] Figure 11 This application provides a waveform diagram of antenna 1 after adding filtering matching, as shown in the embodiment of the present application. Figure 12 This application provides a waveform diagram of antenna 2 after adding filtering matching, as shown in the embodiment of the present application. Figure 13 This application provides a waveform diagram of mutual interference between antenna 1 and antenna 2 after adding filter matching, from which... Figure 13 It can be seen that the isolation between antenna 1 and antenna 2 is around -20dB, which is an improvement of about 10dB.

[0094] Principle Analysis:

[0095] LC circuit filtering principle

[0096] The core principle of LC filters in filtering out noise of different frequencies is to utilize the impedance difference between inductors (L) and capacitors (C) for signals of different frequencies. Through a specific circuit structure, the target frequency signal is allowed to pass through while blocking or shunting noise frequency signals. The specific filtering logic for different frequency noise is as follows:

[0097] 1. High-frequency noise filtering

[0098] The function of an inductor: The inductive reactance of an inductor is calculated as X_L = 2πfL. The higher the frequency f, the greater the inductive reactance. Therefore, high-frequency noise is significantly blocked by the inductor connected in series in the circuit, making it difficult for it to reach the load.

[0099] The function of a capacitor: The capacitive reactance formula is X_C = 1 / (2πfC). The higher the frequency, the lower the capacitive reactance. A capacitor connected in parallel across the load acts as a low-impedance path for high-frequency noise, directly shunting high-frequency noise that is not completely blocked by the inductor to ground, thus preventing it from interfering with the load.

[0100] For example, in a power supply circuit, high-frequency ripple (such as high-frequency noise in a switching power supply) is blocked by a series inductor, and the remaining small amount of high-frequency signal is grounded through a parallel capacitor, thus greatly reducing high-frequency noise at the output.

[0101] 2. Filtering out low-frequency noise

[0102] If it is necessary to filter out low-frequency noise (and retain the target signal at a higher frequency), the circuit structure will be adjusted to a series capacitor + parallel inductor (less common, suitable for specific scenarios):

[0103] The function of a capacitor: Low-frequency noise has a low frequency and a high capacitive reactance. A capacitor connected in series will block low-frequency noise from passing through.

[0104] The function of inductors: Low-frequency noise has a low frequency and low inductive reactance. Parallel inductors provide a low-impedance path for low-frequency noise, shunting it to ground and thus avoiding interference with the load.

[0105] The above-mentioned parallel connection of a capacitor of 2pF or more in the antenna circuit can specifically filter out low-frequency interference below 2300MHz (such as other communication frequency bands, spurious signals, etc.), while ensuring the normal transmission of target signals in the 2300-2690MHz range and improving the purity of the antenna received signals.

[0106] Corresponding to the above filtering method, this application embodiment also provides a processing unit. Figure 14 A schematic diagram of the structure of a processing unit provided in this application is shown below. Figure 14 As shown, this embodiment provides a processing unit, including:

[0107] The determination module 1401 is used to determine the frequency band range of the electromagnetic waves acquired by the antenna;

[0108] The transmitting module 1402 is used to send a first control signal to the control terminal of the first switch when the frequency band range includes the interference frequency band; so that the control terminal of the first switch, after receiving the first control signal, analyzes the first control signal to obtain the identification information of the target filtering module and turns on the target filtering module. The target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves in the interference frequency band alone or in combination with other filtering modules.

[0109] The processing unit provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0110] Figure 15 A schematic diagram of the structure of the electronic device provided in this application. Figure 15As shown, the electronic device 150 provided in this embodiment includes at least one processor 1501 and a memory 1502. Optionally, the device 150 further includes a communication component 1503. The processor 1501, memory 1502, and communication component 1503 are connected via a bus 1504.

[0111] In a specific implementation, at least one processor 1501 executes computer execution instructions stored in memory 1502, causing at least one processor 1501 to perform the above-described method.

[0112] The specific implementation process of processor 1501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0113] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0114] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0115] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0116] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0117] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0118] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0119] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0120] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0121] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0122] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0123] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0124] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0125] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An antenna matching circuit, characterized in that, The circuit includes: The processing unit is used to determine the frequency band range of the electromagnetic waves acquired by the antenna, and when the frequency band range includes the interference frequency band, to send a first control signal to the control terminal of the first switch; A first switch includes a control terminal, an input terminal, and at least one output terminal, with each output terminal corresponding to at least one filtering module. The input terminal of the first switch is connected to the main circuit of the matching circuit, and the output terminal of the first switch is connected to the input terminal of the corresponding filtering module. The control terminal of the first switch is connected to the processing unit and is used to parse the first control signal after receiving it, obtain the identification information of the target filtering module, and turn on the target filtering module. The target filtering module is determined based on the interference frequency band. At least one filtering module, the output terminals of which are all grounded, and the filtering module is used to filter out electromagnetic waves in the interference frequency band, either alone or in conjunction with other filtering modules.

2. The circuit according to claim 1, characterized in that, The target filtering module includes an inductor coil and / or a capacitor, wherein the inductance of the inductor coil and the capacitance of the capacitor are determined according to the interference frequency band.

3. The circuit according to claim 2, characterized in that, The target filtering module is a series resonant circuit consisting of an inductor and a capacitor connected in series, wherein the resonant frequency of the series resonant circuit is the same as the frequency of the interference band.

4. The circuit according to claim 1, characterized in that, The filtering module includes a tunable capacitor element; the control terminal of the tunable capacitor element is connected to the output terminal of the first switch; the first control signal includes a target control voltage, which is determined based on the interference frequency band. The first switch is also used to provide the target control voltage to the control terminal of the tunable capacitor element to adjust the capacitance value of the tunable capacitor element to the target capacitance value; When the capacitance value of the tunable capacitor element is the target capacitance value, the filtering module is used to filter out electromagnetic waves in the interference frequency band.

5. The circuit according to claim 1, characterized in that, The first switch is a MIPI switch.

6. A filtering method, characterized in that, The method, which utilizes the processing unit in the antenna matching circuit of claim 1, comprises: Determine the frequency range of the electromagnetic waves acquired by the antenna; When the frequency band includes the interference frequency band, a first control signal is sent to the control terminal of the first switch; so that after receiving the first control signal, the control terminal of the first switch parses the first control signal to obtain the identification information of the target filtering module, and turns on the target filtering module, wherein the target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves of the interference frequency band alone or in conjunction with other filtering modules.

7. A processing unit, characterized in that, The processing unit includes: The determination module is used to determine the frequency band range of the electromagnetic waves acquired by the antenna; The transmitting module is configured to send a first control signal to the control terminal of the first switch when the frequency band range includes the interference frequency band; so that the control terminal of the first switch, upon receiving the first control signal, parses the first control signal to obtain the identification information of the target filtering module and turns on the target filtering module, wherein the target filtering module is determined according to the interference frequency band, and the filtering module is used to filter out electromagnetic waves of the interference frequency band alone or in conjunction with other filtering modules.

8. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in claim 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in claim 6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method of claim 6.

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