A method, device, medium and equipment for adjusting coupler flatness

Abstract

The present invention belongs to the field of couplers. In order to solve the problem that the existing coupler flatness adjustment technology requires a high level of design and manufacturing capabilities and the overall manufacturing cost of the coupler is high, a coupler flatness adjustment method, device, medium and equipment are provided. Among them, the coupler flatness adjustment method includes determining a coupler equalization circuit model according to the known frequency range of the coupler to be adjusted, and constructing a two-port network corresponding to the coupler; based on the S parameters of the two-port network, simulating and adjusting the parameters of each component of the coupler, obtaining a parameter matching scheme of each component of several groups of couplers that makes the reflection coefficient of the two-port network zero, calculating the reflection coefficient of the actual coupler circuit corresponding to the corresponding scheme, and determining the adjustment direction. The present invention does not require a high level of design and manufacturing capabilities, and can reduce the overall manufacturing cost of the coupler.

Description

Technical Field

[0001] The present invention belongs to the field of couplers, and in particular relates to a method, device, medium and equipment for adjusting the flatness of a coupler. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The coupler is a power distribution component that uses light as a medium to transmit electrical signals. The coupler assembles the light source and the light receiver in the same sealed housing, and isolates them from each other with a transparent insulator. The coupler has a good isolation effect on the input signal and the output signal. The output signal has no effect on the input end, has strong anti-interference ability, stable operation, no contacts, long service life and high transmission efficiency.

[0004] At present, the technical solutions for adjusting the flatness of the coupler include optimizing the structural design and improving the manufacturing process. Among them, the scheme of optimizing the structural design introduces a coaxial resonant cavity and adjusts the coupling area. By introducing a coaxial resonant cavity in the coupler, the passband frequency can be screened, thereby improving the coupling flatness. However, the limitation of the scheme of optimizing the structural design is that it will introduce complex structures (such as coaxial resonant cavities, etc.), and requires a high level of design and manufacturing capabilities. At the same time, fine-tuning of the coupling area and coupling elements also requires rich experience and expertise. For the scheme of improving the manufacturing process, it is necessary to strictly control the processing parameters, detection process and use environment during the manufacturing process to ensure that the manufacturing quality of the coupler meets the design requirements. However, high-precision processing and high-quality materials usually mean higher costs.

[0005] In summary, the current technical solutions for adjusting the flatness of the coupler require a high level of design and manufacturing capabilities, and high-precision processing and high-quality materials increase the overall manufacturing cost of the coupler. Summary of the invention

[0006] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a method, device, medium and equipment for adjusting the flatness of a coupler, which does not require a high level of design and manufacturing capabilities, and can reduce the overall manufacturing cost of the coupler.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A first aspect of the present invention provides a method for adjusting coupler flatness.

[0009] A method for adjusting coupler flatness, comprising:

[0010] Determining a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted;

[0011] According to the coupler equalization circuit model, construct a two-port network corresponding to the coupler;

[0012] According to the two-port network corresponding to the coupler, obtaining the S parameters of the two-port network;

[0013] Simulating and adjusting the parameters of the components of the coupler to obtain a plurality of sets of parameter matching schemes of the components of the coupler so that the reflection coefficient of the two-port network is zero, thereby forming a set of parameter matching schemes of the components of the coupler; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network;

[0014] For any scheme in the set of coupler component parameter matching schemes, calculate the reflection coefficient of the actual coupler circuit corresponding to the corresponding scheme and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

[0015] As an implementation method, the construction process of the coupler equalization circuit model is as follows:

[0016] According to the known frequency range of the coupler to be adjusted, combined with the filter design principle and design method, an initial coupler equalization circuit model is designed;

[0017] Based on the simulation data of the initial coupler equalization circuit model, the optimal equalization circuit model is obtained, so that the original response of the coupler to be adjusted is attenuated within a set frequency range to achieve the purpose of equalization.

[0018] As an implementation method, the coupler equalization circuit model includes a coaxial transmission part, a forward adjustment unit and a reverse adjustment unit;

[0019] The forward adjustment unit includes a forward sampling unit, a forward capacitance adjustment unit, a forward inductance adjustment unit and a forward resistance adjustment unit; the reverse adjustment unit includes a reverse sampling unit, a reverse capacitance adjustment unit, a reverse inductance adjustment unit and a reverse resistance adjustment unit;

[0020] One end of the forward sampling section is connected to the coaxial transmission section, and the other end is connected to the forward capacitance adjustment section; the other end of the forward capacitance adjustment section is connected to one end of the forward inductance adjustment section; one end of the reverse sampling section is connected to the coaxial transmission section, and the other end is connected to the reverse capacitance adjustment section; the other end of the reverse capacitance adjustment section is connected to one end of the reverse inductance adjustment section.

[0021] As an implementation mode, the coaxial transmission part is composed of a coaxial conductor, which is used to connect to the transmission circuit to be tested; the forward capacitance adjustment part, the forward inductance adjustment part and the forward resistance adjustment part are all used to adjust the forward impedance matching; the reverse capacitance adjustment part, the reverse inductance adjustment part and the reverse resistance adjustment part are all used to adjust the reverse impedance matching.

[0022] A second aspect of the present invention provides a coupler flatness adjustment device.

[0023] A coupler flatness adjustment device, comprising:

[0024] A coupler equalization circuit model determination module, which is used to determine a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted;

[0025] A two-port network construction module, which is used to construct a two-port network corresponding to the coupler according to the coupler equalization circuit model;

[0026] A two-port network S parameter acquisition module, which is used to acquire the S parameters of the two-port network according to the two-port network corresponding to the coupler;

[0027] A component parameter simulation adjustment module, which is used to simulate and adjust the parameters of each component of the coupler, obtain a plurality of component parameter matching schemes of the coupler so that the reflection coefficient of the two-port network is zero, and form a set of coupler component parameter matching schemes; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network;

[0028] The actual component parameter adjustment module is used to calculate the reflection coefficient of the actual coupler circuit corresponding to any scheme in the set of coupler component parameter matching schemes and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

[0029] A third aspect of the present invention provides a computer-readable storage medium.

[0030] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the coupler flatness adjustment method as described above.

[0031] A fourth aspect of the present invention provides an electronic device.

[0032] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in the above-mentioned method for adjusting the flatness of a coupler when executing the program.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention combines simulation with an actual scheme for adjusting the parameters of coupler components. First, the parameters of the components of the coupler are adjusted by simulation to obtain several sets of component parameter matching schemes that make the reflection coefficient of the two-port network corresponding to the coupler zero. Then, according to the difference between the reflection coefficient of the actual coupler circuit corresponding to the component parameter matching scheme and zero, an actual coupler circuit whose difference between the reflection coefficient of the coupler circuit and zero is within a preset range is determined, thereby finally making the coupling response of the entire coupler smoother.

[0035] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0037] Figure 1 is a flow chart of a method for adjusting coupler flatness according to an embodiment of the present invention;

[0038] Figure 2 is a coupler equalization circuit model of an embodiment of the present invention;

[0039] Figure 3 is a regulating circuit corresponding to the coupler equalization circuit model of an embodiment of the present invention;

[0040] Figure 4 is a curve before the coupler of the embodiment of the present invention is debugged;

[0041] Figure 5 is a curve of the coupler of the embodiment of the present invention after debugging;

[0042] Figure 6 is a two-port network according to an embodiment of the present invention;

[0043] Figure 7 It is a structural diagram of a coupler flatness adjustment device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Terminology explanation:

[0048] The flatness of a coupler refers to the difference between the maximum and minimum values ​​of the coupling degree within the entire available frequency band. This indicator is very important for ensuring that the signal has consistent performance at different frequencies. Good flatness means that the coupler provides a uniform coupling effect within the covered frequency range, thereby ensuring the consistency and stability of signal transmission. In microstrip couplers, the flatness is generally 0.5~0.2dB, while for cavity couplers, since the coupling degree is a curve, the flatness is usually poor, which is difficult to express in actual use. The quality of flatness directly affects the performance of the coupler in the communication system, especially in situations where precise control of signal power distribution is required.

[0049] like Figure 1 As shown, this embodiment provides a method for adjusting coupler flatness, which includes:

[0050] S101: Determine a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted, such as Figure 2 As shown;

[0051] The construction process of the coupler equalization circuit model is as follows:

[0052] S1011: Based on the known frequency range of the coupler to be adjusted, combined with the filter design principles (frequency selection characteristics, passband and stopband) and design methods (such as window method, frequency sampling method, optimal equal ripple phase approximation method, etc.), design an initial coupler equalization circuit model;

[0053] S1012: Based on the simulation data of the initial coupler equalization circuit model, an optimal equalization circuit model is obtained, so that the original response of the coupler to be adjusted is attenuated within a set frequency range to achieve the purpose of equalization. For the coupler, it is usually divided into multiple frequency bands such as 400K, 10M, 100M, and 1Ghz.

[0054] In this embodiment, if Figure 2 As shown, the coupler equalization circuit model includes a coaxial transmission part, a forward adjustment unit and a reverse adjustment unit;

[0055] The forward adjustment unit includes a forward sampling unit, a forward capacitance adjustment unit, a forward inductance adjustment unit and a forward resistance adjustment unit; the reverse adjustment unit includes a reverse sampling unit, a reverse capacitance adjustment unit, a reverse inductance adjustment unit and a reverse resistance adjustment unit;

[0056] One end of the forward sampling section is connected to the coaxial transmission section, and the other end is connected to the forward capacitance adjustment section; the other end of the forward capacitance adjustment section is connected to one end of the forward inductance adjustment section; one end of the reverse sampling section is connected to the coaxial transmission section, and the other end is connected to the reverse capacitance adjustment section; the other end of the reverse capacitance adjustment section is connected to one end of the reverse inductance adjustment section.

[0057] Among them, the coaxial transmission part is composed of a coaxial conductor, which is used to connect to the transmission circuit to be tested; the forward capacitance adjustment part, the forward inductance adjustment part and the forward resistance adjustment part are all used to adjust the forward impedance matching; the reverse capacitance adjustment part, the reverse inductance adjustment part and the reverse resistance adjustment part are all used to adjust the reverse impedance matching.

[0058] S102: According to the coupler equalization circuit model, construct Figure 6 The two-port network corresponding to the coupler shown is shown in Figure 6 middle, and are the voltage and current at the input terminal respectively; and are the voltage and current at the output, respectively.

[0059] S103: According to the two-port network corresponding to the coupler, obtain the S parameters of the two-port network; wherein the S parameters include the two-port , , , The parameters can be calculated using the following formula or measured using a vector network analyzer.

[0060]

[0061] in, represents the reflection coefficient at the input end; represents the transmission coefficient at the input end; represents the transmission coefficient at the output end; It represents the reflection coefficient at the output end; Indicates the equivalent impedance value at the reflection point (i.e. the interface between two media); represents the characteristic impedance, which is usually a constant and a real number; In case of multiple reflections, it indicates the impedance value of the first reflection point. and Together they form the load impedance.

[0062] S104: Simulate and adjust the parameters of the components of the coupler to obtain a plurality of component parameter matching schemes of the coupler so that the reflection coefficient of the two-port network is zero, thereby forming a set of component parameter matching schemes of the coupler; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network; the regulating circuit corresponding to the coupler equalization circuit model of the embodiment of the present invention is as follows: Figure 3 shown.

[0063] S105: For any scheme in the set of coupler component parameter matching schemes, calculate the reflection coefficient of the actual coupler circuit corresponding to the corresponding scheme and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

[0064] This embodiment combines simulation with an actual solution for adjusting the parameters of the coupler components. First, the parameters of the components of the coupler are adjusted by simulation to obtain several sets of component parameter matching solutions that make the reflection coefficient of the two-port network corresponding to the coupler zero. Then, based on the difference between the reflection coefficient of the actual coupler circuit corresponding to the component parameter matching solution and zero, an actual coupler circuit whose difference between the reflection coefficient of the coupler circuit and zero is within a preset range is determined, thereby ultimately making the coupling response of the entire coupler smoother.

[0065] Figure 4 This is the curve tested after the simulation flatness is adjusted and the actual proof is produced. From this, we can see that after actual production, due to various reasons such as processing accuracy, processing difficulty, and design structure complexity, there is still a big difference between the stability of the actual finished product and the stability of the simulation.

[0066] After debugging by the method of the present invention, the flatness of the coupler is greatly optimized. The specific test curve is as follows: Figure 5 As shown: It can be seen that after debugging, the overall flatness has been greatly optimized in the range of 10Mhz to 50Mhz.

[0067] like Figure 7 As shown, this embodiment provides a coupler flatness adjustment device, which includes:

[0068] A coupler equalization circuit model determination module 701, which is used to determine a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted;

[0069] A two-port network construction module 702, which is used to construct a two-port network corresponding to the coupler according to the coupler equalization circuit model;

[0070] A two-port network S parameter acquisition module 703, which is used to acquire the S parameters of the two-port network according to the two-port network corresponding to the coupler;

[0071] A component parameter simulation adjustment module 704 is used to simulate and adjust the component parameters of the coupler to obtain a plurality of component parameter matching schemes of the coupler so that the reflection coefficient of the two-port network is zero, thereby forming a set of component parameter matching schemes of the coupler; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network;

[0072] The actual component parameter adjustment module 705 is used to calculate the reflection coefficient of the actual coupler circuit corresponding to any scheme in the set of coupler component parameter matching schemes and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

[0073] In the specific implementation process, the construction process of the coupler equalization circuit model is:

[0074] According to the known frequency range of the coupler to be adjusted, combined with the filter design principle and design method, an initial coupler equalization circuit model is designed;

[0075] Based on the simulation data of the initial coupler equalization circuit model, the optimal equalization circuit model is obtained, so that the original response of the coupler to be adjusted is attenuated within a set frequency range to achieve the purpose of equalization.

[0076] In a specific implementation process, the coupler equalization circuit model includes a coaxial transmission part, a forward adjustment unit and a reverse adjustment unit;

[0077] The forward adjustment unit includes a forward sampling unit, a forward capacitance adjustment unit, a forward inductance adjustment unit and a forward resistance adjustment unit; the reverse adjustment unit includes a reverse sampling unit, a reverse capacitance adjustment unit, a reverse inductance adjustment unit and a reverse resistance adjustment unit;

[0078] One end of the forward sampling section is connected to the coaxial transmission section, and the other end is connected to the forward capacitance adjustment section; the other end of the forward capacitance adjustment section is connected to one end of the forward inductance adjustment section; one end of the reverse sampling section is connected to the coaxial transmission section, and the other end is connected to the reverse capacitance adjustment section; the other end of the reverse capacitance adjustment section is connected to one end of the reverse inductance adjustment section.

[0079] In the specific implementation process, the coaxial transmission part is composed of a coaxial conductor, which is used to connect to the transmission circuit to be tested; the forward capacitance adjustment part, the forward inductance adjustment part and the forward resistance adjustment part are all used to adjust the forward impedance matching; the reverse capacitance adjustment part, the reverse inductance adjustment part and the reverse resistance adjustment part are all used to adjust the reverse impedance matching.

[0080] It should be noted that the modules in the coupler flatness adjustment device correspond to the steps in the above coupler flatness adjustment method, and the specific implementation process is the same, which will not be described in detail here.

[0081] In one or more embodiments, a computer-readable storage medium is further provided, on which a computer program is stored. When the program is executed by a processor, the steps in the method for adjusting the flatness of a coupler as described above are implemented.

[0082] In one or more embodiments, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the coupler flatness adjustment method described above are implemented.

[0083] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part, and / or installed from a removable medium. When the computer program is executed by a central processing unit, various functions defined in the device of the present application are executed.

[0084] The present invention is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products of the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of the processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting coupler flatness, characterized in that: include: Determining a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted; The coupler equalization circuit model includes a coaxial transmission part, a forward adjustment unit and a reverse adjustment unit; The forward adjustment unit includes a forward sampling unit, a forward capacitance adjustment unit, a forward inductance adjustment unit and a forward resistance adjustment unit; the reverse adjustment unit includes a reverse sampling unit, a reverse capacitance adjustment unit, a reverse inductance adjustment unit and a reverse resistance adjustment unit; One end of the forward sampling part is connected to the coaxial transmission part, and the other end is connected to the forward capacitance adjustment part; the other end of the forward capacitance adjustment part is connected to one end of the forward inductance adjustment part; one end of the reverse sampling part is connected to the coaxial transmission part, and the other end is connected to the reverse capacitance adjustment part; the other end of the reverse capacitance adjustment part is connected to one end of the reverse inductance adjustment part; According to the coupler equalization circuit model, construct a two-port network corresponding to the coupler; According to the two-port network corresponding to the coupler, obtaining the S parameters of the two-port network; Simulating and adjusting the parameters of the components of the coupler to obtain a plurality of sets of parameter matching schemes of the components of the coupler so that the reflection coefficient of the two-port network is zero, thereby forming a set of parameter matching schemes of the components of the coupler; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network; For any scheme in the set of coupler component parameter matching schemes, calculate the reflection coefficient of the actual coupler circuit corresponding to the corresponding scheme and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

2. The method for adjusting coupler flatness according to claim 1, characterized in that: The construction process of the coupler equalization circuit model is as follows: According to the known frequency range of the coupler to be adjusted, combined with the filter design principle and design method, an initial coupler equalization circuit model is designed; Based on the simulation data of the initial coupler equalization circuit model, the optimal equalization circuit model is obtained, so that the original response of the coupler to be adjusted is attenuated within a set frequency range to achieve the purpose of equalization.

3. The method for adjusting coupler flatness according to claim 1, wherein: The coaxial transmission part is composed of a coaxial conductor and is used to connect to the transmission circuit to be tested; the forward capacitance adjustment part, the forward inductance adjustment part and the forward resistance adjustment part are all used to adjust the forward impedance matching; the reverse capacitance adjustment part, the reverse inductance adjustment part and the reverse resistance adjustment part are all used to adjust the reverse impedance matching.

4. A coupler flatness adjustment device, characterized in that: include: A coupler equalization circuit model determination module, which is used to determine a coupler equalization circuit model according to a known frequency range of the coupler to be adjusted; the coupler equalization circuit model includes a coaxial transmission part, a forward adjustment unit and a reverse adjustment unit; The forward adjustment unit includes a forward sampling unit, a forward capacitance adjustment unit, a forward inductance adjustment unit and a forward resistance adjustment unit; the reverse adjustment unit includes a reverse sampling unit, a reverse capacitance adjustment unit, a reverse inductance adjustment unit and a reverse resistance adjustment unit; One end of the forward sampling part is connected to the coaxial transmission part, and the other end is connected to the forward capacitance adjustment part; the other end of the forward capacitance adjustment part is connected to one end of the forward inductance adjustment part; one end of the reverse sampling part is connected to the coaxial transmission part, and the other end is connected to the reverse capacitance adjustment part; the other end of the reverse capacitance adjustment part is connected to one end of the reverse inductance adjustment part; A two-port network construction module, which is used to construct a two-port network corresponding to the coupler according to the coupler equalization circuit model; A two-port network S parameter acquisition module, which is used to acquire the S parameters of the two-port network according to the two-port network corresponding to the coupler; A component parameter simulation adjustment module, which is used to simulate and adjust the parameters of each component of the coupler, obtain a plurality of component parameter matching schemes of the coupler so that the reflection coefficient of the two-port network is zero, and form a set of coupler component parameter matching schemes; wherein the reflection coefficient of the two-port network is calculated by the S parameter of the two-port network; The actual component parameter adjustment module is used to calculate the reflection coefficient of the actual coupler circuit corresponding to any scheme in the set of coupler component parameter matching schemes and determine whether it is zero. If so, stop adjusting; otherwise, adjust the parameters of at least one component of the coupler until the difference between the reflection coefficient of the coupler circuit and zero is within a preset range, and stop adjusting.

5. The coupler flatness adjustment device according to claim 4, characterized in that: The construction process of the coupler equalization circuit model is as follows: According to the known frequency range of the coupler to be adjusted, combined with the filter design principle and design method, an initial coupler equalization circuit model is designed; Based on the simulation data of the initial coupler equalization circuit model, the optimal equalization circuit model is obtained, so that the original response of the coupler to be adjusted is attenuated within a set frequency range to achieve the purpose of equalization.

6. The coupler flatness adjustment device according to claim 4, characterized in that: The coaxial transmission part is composed of a coaxial conductor and is used to connect to the transmission circuit to be tested; the forward capacitance adjustment part, the forward inductance adjustment part and the forward resistance adjustment part are all used to adjust the forward impedance matching; the reverse capacitance adjustment part, the reverse inductance adjustment part and the reverse resistance adjustment part are all used to adjust the reverse impedance matching.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the coupler flatness adjustment method according to any one of claims 1 to 3 are implemented.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the coupler flatness adjustment method according to any one of claims 1 to 3 are implemented.

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