Coupler integrated with impedance detection and power amplifier

Abstract

The utility model discloses a coupler integrated with impedance detection and a power amplifier. The integrated impedance detection coupler comprises a first shell, a metal column, a coupling circuit board, a fixing structure and an impedance detection module, the metal column is located in a cavity in the first shell; the first surface of the first shell comprises a gap, part of the coupling circuit board penetrates through the gap and is located in a cavity in the first shell, and the rest of the coupling circuit board protrudes out of the first surface; the width of the gap is greater than that of the coupling circuit board in the width direction of the coupling circuit board; in the width direction of the coupling circuit board, the fixing structure is used for fixing the coupling circuit board on the first shell; the impedance detection module is located on the side, away from the first surface, of the second surface of the first shell. The coupler integrating impedance detection and the power amplifier are simple in structure, the coupling degree and directivity of the coupler can be guaranteed, impedance detection can be achieved, and detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to a coupler and power amplifier with integrated impedance detection. Background Technology

[0002] Integrated impedance sensing couplers are a versatile microwave / millimeter-wave component that can be used for signal isolation, separation, and mixing, such as power monitoring, source output power stabilization, signal source isolation, and frequency sweep testing of transmission and reflection.

[0003] However, existing integrated impedance sensing couplers, under high directivity requirements, are susceptible to coupling accuracy issues caused by structural errors, impedance mismatch, and other factors, resulting in insufficient signal detection sensitivity. Furthermore, existing solutions typically require an additional independent impedance sensing module, leading to increased system complexity and cost, as well as introducing signal path losses and phase errors. Utility Model Content

[0004] This invention provides a coupler and power amplifier with integrated impedance detection. It has a simple structure, which can ensure the coupling degree and directionality of the coupler, and can also realize impedance detection, thereby improving detection efficiency.

[0005] According to one aspect of the present invention, an integrated impedance detection coupler is provided, the coupler comprising: a first housing, a metal pillar, a coupling circuit board, a fixing structure, and an impedance detection module;

[0006] The metal column is located in a cavity within the first housing;

[0007] The first surface of the first housing includes a gap, a portion of the coupling circuit board passes through the gap and is located in a cavity within the first housing, and the remaining coupling circuit board protrudes from the first surface;

[0008] In the width direction of the coupling circuit board, the width of the gap is greater than the width of the coupling circuit board;

[0009] In the width direction of the coupling circuit board, the fixing structure is located on one side of the coupling circuit board, and the fixing structure is used to fix the coupling circuit board to the first housing;

[0010] The impedance detection module is located on the side of the second surface of the first housing away from the first surface, wherein the first surface and the second surface are arranged opposite to each other.

[0011] Optionally, the fixing structure is detachably connected to the first housing;

[0012] The fixing structure is detachably connected to the coupling circuit board.

[0013] Optionally, the integrated impedance sensing coupler provided in this embodiment further includes an input conductive post, an output conductive post, a forward coupling conductive post, and a reverse coupling conductive post;

[0014] The first end of the input conductive post is electrically connected to the first end of the metal post, and the second end of the input conductive post protrudes from the first surface;

[0015] The first end of the output conductive post is electrically connected to the second end of the metal post, and the second end of the output conductive post protrudes from the second surface;

[0016] The forward coupling conductive post is electrically connected to the first input terminal of the coupling circuit board, and the reverse coupling conductive post is electrically connected to the second input terminal of the coupling circuit board;

[0017] Both the forward-coupled conductive post and the reverse-coupled conductive post are located on the side of the first surface away from the second surface.

[0018] Optionally, the fixing structure includes a first fixing plate and a second fixing plate;

[0019] The first fixing plate and the second fixing plate are integrally connected;

[0020] The first fixing plate is detachably connected to the first housing, and the second fixing plate is detachably connected to the coupling circuit board;

[0021] Along the length of the coupling circuit board, the length of the first fixing plate is less than the length of the coupling circuit board, and the length of the second fixing plate is less than the length of the coupling circuit board.

[0022] Optionally, the coupler with integrated impedance detection provided in this embodiment further includes a first insulating hollow column and a second insulating hollow column;

[0023] The first insulating hollow column encloses the input conductive column that protrudes from the first surface;

[0024] The second insulating hollow column encloses the output conductive column that protrudes from the second surface.

[0025] Optionally, the impedance detection module includes a coupling plate, a current detection unit, a voltage detection unit, a current output terminal, and a voltage output terminal;

[0026] The coupling plate includes a through hole surrounding a second insulating hollow column;

[0027] The current detection unit is electrically connected to the coupling plate and the current output terminal;

[0028] The voltage detection unit is electrically connected to the coupling plate and the voltage output terminal.

[0029] Optionally, the coupler with integrated impedance sensing provided in this embodiment also includes a second housing;

[0030] The second housing is located on the side of the second surface that is away from the first surface;

[0031] The second housing is used to enclose the impedance detection module.

[0032] Optionally, in the width direction of the coupling circuit board, the difference between the width of the gap and the width of the coupling circuit board ranges from 0.1 mm to 8 mm.

[0033] Optionally, the shape of the first housing includes a cuboid;

[0034] The metal column is cylindrical in shape.

[0035] According to another aspect of the present invention, a power amplifier is provided, which includes an integrated impedance sensing coupler provided in any embodiment of the present invention.

[0036] This invention provides a coupler with integrated impedance detection. By setting the width of the gap in the first housing to be greater than the width of the coupling circuit board, the distance between the coupling circuit board and the metal pillar can be dynamically adjusted. After each adjustment, the coupling degree and directivity of the coupler are detected. After multiple adjustments, when both the coupling degree and directivity meet the corresponding set requirements, the coupling circuit board is fixed to the first housing using a fixing structure, thereby ensuring the coupling degree and directivity of the coupler. Using a fixing structure to fix the coupling circuit board simplifies the coupler's structure and facilitates its fabrication. By placing the impedance detection module on the side of the second surface of the first housing away from the first surface, the coupler provided by this invention achieves impedance detection functionality. In summary, the coupler with integrated impedance detection provided by this invention has a simple structure, ensures both coupling degree and directivity, and achieves impedance detection, improving detection efficiency.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of an integrated impedance detection coupler without a coupling circuit board and a fixed structure according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of an integrated impedance detection coupler without a fixed structure according to an embodiment of the present utility model;

[0041] Figure 3 This is a schematic diagram of an integrated impedance detection coupler without a first housing according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of an integrated impedance detection coupler from a first perspective according to an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of an integrated impedance detection coupler from a second perspective, according to an embodiment of the present invention.

[0044] Figure 6 This is a schematic diagram of the structure of another integrated impedance detection coupler provided according to an embodiment of the present utility model;

[0045] Figure 7 This is a schematic diagram showing the positional relationship between an impedance detection module, a second insulating hollow column, and an output conductive column, according to an embodiment of this utility model. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] Figure 1 This is a schematic diagram of an integrated impedance detection coupler without a coupling circuit board and a fixed structure, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of an integrated impedance detection coupler without a fixed structure according to an embodiment of the present invention. Figure 3 This is a schematic diagram of an integrated impedance detection coupler without a first housing, according to an embodiment of the present invention. Figure 4 This is a schematic diagram of an integrated impedance detection coupler from a first perspective, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of an integrated impedance detection coupler from a second perspective according to an embodiment of the present invention. The first and second perspectives are different. (Refer to...) Figures 1-5 The integrated impedance detection coupler provided in this embodiment includes: a first housing 110, a metal pillar 120, a coupling circuit board 130, a fixing structure 140, and an impedance detection module 150; the metal pillar 120 is located in a cavity within the first housing 110; the first surface S1 of the first housing 110 includes a gap 111, a portion of the coupling circuit board 130 passes through the gap 111 and is located in the cavity within the first housing 110, and the remaining coupling circuit board 130 protrudes from the first surface S1; in the width direction Y of the coupling circuit board 130, the width of the gap 111 is greater than the width of the coupling circuit board 130; in the width direction Y of the coupling circuit board 130, the fixing structure 140 is located on one side of the coupling circuit board 130, and the fixing structure 140 is used to fix the coupling circuit board 130 to the first housing 110; the impedance detection module 150 is located on the side of the second surface S2 of the first housing 110 away from the first surface S1, wherein the first surface S1 and the second surface S2 are disposed opposite to each other.

[0049] Specifically, the first housing 110 can be made of metal. The coupling circuit board 130 and the metal pillar 120 are spaced apart, with the metal pillar 120 extending along the length direction X of the coupling circuit board 130. The area between the metal pillar 120 and the coupling circuit board 130 is the coupling region, and the metal pillar 120 and the coupling circuit board 130 are electromagnetically coupled. In this embodiment, the coupling circuit board 130 can be a multilayer PCB design, and the main transmission line of the coupling circuit board 130 is a 50Ω microstrip line. The metal pillar 120 can be a copper pillar.

[0050] In the longitudinal direction X of the coupling circuit board 130, the length of the gap 111 may be greater than the length of the coupling circuit board 130. Both the longitudinal direction X and the width direction Y of the coupling circuit board 130 are parallel to the first surface S1. The longitudinal direction X of the coupling circuit board 130 is perpendicular to the width direction Y of the coupling circuit board 130.

[0051] The spacing between the coupling circuit board 130 and the metal pillar 120 affects the coupling degree and directivity of the coupler provided in this embodiment. In this embodiment, the width of the gap 111 is set to be greater than the width of the coupling circuit board 130. This allows a portion of the coupling circuit board 130 to be placed through the gap 111 into the cavity within the first housing 110 before fixing its specific position. By moving the position of the coupling circuit board 130 along its width direction Y, the spacing between the metal pillar 120 and the coupling circuit board 130 is dynamically adjusted, thereby controlling the coupling degree and directivity of the coupler with integrated impedance detection. When both the coupling degree and directivity meet the corresponding set requirements, the coupling circuit board 130 is fixed to the first housing 110 by the fixing structure 140, thus ensuring the coupling degree and directivity of the coupler provided in this embodiment.

[0052] After the fixing structure 140 fixes the coupling circuit board 130 to the first housing 110, the coupling circuit board 130 and the first housing 110 will remain relatively stationary. The fixing structure 140 can be connected to both the coupling circuit board 130 and the first housing 110, thereby fixing the coupling circuit board 130 to the first housing 110. The remaining coupling circuit board 130 refers to the coupling circuit board 130 excluding the coupling circuit board 130 located in the cavity. Providing a portion of the coupling circuit board 130 protruding from the first surface S1 facilitates the movement of the coupling circuit board 130. The height of the coupling circuit board 130 can be greater than the height of the first housing 110.

[0053] The impedance detection module 150 is used to detect the impedance in the system where the coupler provided in this embodiment is located. By setting the impedance detection module 150 on the side of the second surface S2 of the first housing 110 away from the first surface S1, the coupler with integrated impedance detection provided in this embodiment can realize both the function of a coupler and the function of impedance detection. Multiple functions can be detected by a single coupler, thereby improving detection efficiency.

[0054] This embodiment provides a coupler with integrated impedance detection. By setting the width of the gap in the first housing to be greater than the width of the coupling circuit board, the spacing between the coupling circuit board and the metal pillar can be dynamically adjusted. After each adjustment, the coupling degree and directivity of the coupler are detected. After multiple adjustments, when both the coupling degree and directivity meet the corresponding set requirements, the coupling circuit board is fixed to the first housing using a fixing structure, thereby ensuring the coupling degree and directivity of the coupler. Using a fixing structure to fix the coupling circuit board simplifies the coupler's structure and facilitates its fabrication. By placing the impedance detection module on the side of the second surface of the first housing away from the first surface, the coupler provided in this embodiment achieves impedance detection functionality. In summary, the coupler with integrated impedance detection provided in this embodiment has a simple structure, ensures both coupling degree and directivity, and achieves impedance detection, improving detection efficiency.

[0055] Optional, continue to refer to Figure 4 The fixing structure 140 is detachably connected to the first housing 110; the fixing structure 140 is detachably connected to the coupling circuit board 130.

[0056] Specifically, the fixing structure 140 can be fixed to the first housing 110 by screws, and the fixing structure 140 can also be fixed to the coupling circuit board 130 by screws.

[0057] The fixing structure 140 is detachably connected to both the first housing 110 and the coupling circuit board 130. After each adjustment of the distance between the coupling circuit board 130 and the metal post 120, the fixing structure 140 secures the coupling circuit board 130 to the first housing 110, and measures the coupling degree and directionality of the coupler. If at least one of the coupling degree and directionality fails to meet the corresponding set conditions, the fixing structure 140 is detached from the first housing 110 and the coupling circuit board 130, and the distance between the coupling circuit board 130 and the metal post 120 is adjusted again. Therefore, this embodiment detachably connects the fixing structure 140 to both the first housing 110 and the coupling circuit board 130, allowing the coupling circuit board 130 to be secured to the first housing 110 during the adjustment of the distance between the coupling circuit board 130 and the metal post 120, thus eliminating the need for other structures to secure the coupling circuit board 130 before the distance is properly adjusted.

[0058] It should be noted that the fixing structure 140 is detachably connected to the coupling circuit board 130 protruding from the first surface S1.

[0059] Optional, continue to refer to Figures 1-5 The integrated impedance detection coupler provided in this embodiment further includes an input conductive post 210, an output conductive post 220, a forward coupling conductive post 230, and a reverse coupling conductive post 240; the first end of the input conductive post 210 is electrically connected to the first end of the metal post 120, and the second end of the input conductive post 210 protrudes from the first surface S1; the first end of the output conductive post 220 is electrically connected to the second end of the metal post 120, and the second end of the output conductive post 220 protrudes from the second surface S2; the forward coupling conductive post 230 is electrically connected to the first input end of the coupling circuit board 130, and the reverse coupling conductive post 240 is electrically connected to the second input end of the coupling circuit board 130; both the forward coupling conductive post 230 and the reverse coupling conductive post 240 are located on the side of the first surface S1 away from the second surface S2.

[0060] Specifically, input conductor 210 receives the input signal and serves as the signal source port of the coupler. The signal input through this port is partially distributed to the forward coupling conductor 230. Output conductor 220 outputs the uncoupled signal, i.e., the main component of the input signal. This port provides the portion of the input signal that has been directly transmitted through the coupler without coupling. Forward coupling conductor 230 extracts and outputs the coupled signal from the input signal. Reverse coupling conductor 240 detects the inverse component of the input signal.

[0061] The second end of the input conductive post 210 protrudes from the first surface S1, and the second end of the output conductive post 220 protrudes from the second surface S2, which facilitates the electrical connection between the testing device and the input conductive post 210 and the output conductive post 220.

[0062] Optional, continue to refer to Figure 4 The fixing structure 140 includes a first fixing plate 141 and a second fixing plate 142; the first fixing plate 141 and the second fixing plate 142 are integrally connected; the first fixing plate 141 is detachably connected to the first housing 110, and the second fixing plate 142 is detachably connected to the coupling circuit board 130; in the length direction X of the coupling circuit board 130, the length of the first fixing plate 141 is less than the length of the coupling circuit board 130, and the length of the second fixing plate 142 is less than the length of the coupling circuit board 130.

[0063] Specifically, the first fixing plate 141 and the second fixing plate 142 are perpendicular to each other and located on the same side of the coupling circuit board 130. The second fixing plate 142 may include two threaded holes, through which screws can be passed to fix the second fixing plate 142 to the coupling circuit board 130. The first fixing plate 141 may include two through holes, through which screws can be passed into the threaded holes in the first housing 110 to fix the first fixing plate 141 to the first housing 110.

[0064] Both the first fixing plate 141 and the second fixing plate 142 can be located between the forward-coupled conductive post 230 and the reverse-coupled conductive post 240. The fixing structure 140 provided in this embodiment can be formed by the first fixing plate 141 and the second fixing plate 142. It can be seen that the fixing structure 140 provided in this embodiment has a simple structure.

[0065] Optional, continue to refer to Figures 1-5 The integrated impedance detection coupler provided in this embodiment also includes a first insulating hollow column 310 and a second insulating hollow column 320; the first insulating hollow column 310 encloses the input conductive column 210 protruding from the first surface S1; the second insulating hollow column 320 encloses the output conductive column 220 protruding from the second surface S2.

[0066] Specifically, the input conductive post 210 protruding from the first surface S1 is located inside the hollow of the first insulating hollow post 310, and the output conductive post 220 protruding from the second surface S2 is located inside the hollow of the second insulating hollow post 320. The materials of the first insulating hollow post 310 and the second insulating hollow post 320 can be the same. The integrated impedance detection coupler provided in this embodiment also includes a third insulating hollow post 330 and a fourth insulating hollow post 340, with the first end of the metal post 120 located inside the third insulating hollow post 330 and the second end of the metal post 120 located inside the fourth insulating hollow post 340.

[0067] Optional, Figure 6 This is a schematic diagram of another integrated impedance detection coupler provided according to an embodiment of the present invention, with reference to... Figure 6 The integrated impedance detection coupler provided in this embodiment also includes a second housing 160; the second housing 160 is located on the side of the second surface S2 away from the first surface S1; the second housing 160 is used to enclose the impedance detection module 150.

[0068] Specifically, the material of the second housing 160 can be the same as that of the first housing 110. The second housing 160 is designed to prevent the impedance detection module 150 from being easily damaged during use.

[0069] Optional, Figure 7This is a schematic diagram illustrating the positional relationship between the impedance detection module, the second insulating hollow column, and the output conductive column, according to an embodiment of this utility model. (Refer to...) Figure 7 The impedance detection module includes a coupling plate 151, a current detection unit 152, a voltage detection unit 153, a current output terminal 154, and a voltage output terminal 155. The coupling plate 151 includes a through hole surrounding the second insulating hollow column 320. The current detection unit 152 is electrically connected to the coupling plate 151 and the current output terminal 154. The voltage detection unit 153 is electrically connected to the coupling plate 151 and the voltage output terminal 155.

[0070] Specifically, the coupling plate 151 and the second insulating hollow column 320 are not directly electrically connected. The signal in the second insulating hollow column 320 can be coupled to the coupling plate 151. It can be seen that the coupler with integrated impedance detection provided in this embodiment does not require setting an additional interface for the impedance detection module. After connecting to the corresponding interface of the coupler, the effects of directionality, coupling and impedance detection can be achieved.

[0071] The current detection unit 152, electrically connected to the coupling plate 151, can detect the current in the coupler and output the detected current through the current output terminal 154. The voltage detection unit 153, also electrically connected to the coupling plate 151, can detect the voltage in the coupler and output the detected voltage through the voltage output terminal 155. Both the current detection unit 152 and the voltage detection unit 153 include a π-type attenuator.

[0072] Optional, continue to refer to Figure 2 In the width direction Y of the coupling circuit board 130, the difference between the width of the gap 111 and the width of the coupling circuit board 130 is in the range of 0.1mm to 8mm. This setting can increase the movement range of the coupling circuit board 130, thereby allowing for more precise adjustment of the directionality and coupling degree of the coupler.

[0073] Optionally, the first housing may be cuboid in shape; the metal pillar may be cylindrical in shape.

[0074] Specifically, setting the shape of the first housing to a cuboid facilitates the placement and use of the coupler provided in this embodiment. Setting the shape of the metal pillar to a cylinder facilitates the fabrication of the metal pillar.

[0075] To better understand the function of the integrated impedance sensing coupler provided in this embodiment, the parameter calibration method of the integrated impedance sensing coupler provided in this embodiment will be introduced below:

[0076] Connect the first port of the network analyzer to the second end of the input conductive post of the coupler, the second port of the network analyzer to the second end of the output conductive post, the third port of the network analyzer to the forward coupling conductive post, and the fourth port of the network analyzer to the reverse coupling conductive post. After connection, in a 50Ω system, adjust the spacing between the coupling circuit board and the metal post, and monitor the S-parameters of the forward and reverse coupling conductive posts in real time. When S31 (FWD coupling degree) reaches -40dB and S41 (RFL directivity) ≤ -78dB, fix the coupling circuit board at this point using a fixing structure, thereby completing the coupler parameter optimization with integrated impedance sensing.

[0077] Debugging process:

[0078] Inject a standard test signal into the second end of the input conductive post; adjust the device parameter values ​​in the voltage detection unit, such as the resistance value in the voltage detection unit, so that the amplitude of the voltage output terminal is -60dBm; synchronously adjust the device parameter values ​​in the current detection unit, such as the resistance value in the current detection unit, so that the amplitude of the current output terminal is also -60dBm, ensuring that the amplitude consistency error of the two channels is ≤±1dB, thereby completing the design of the impedance detection module.

[0079] This embodiment provides a power amplifier that includes an integrated impedance sensing coupler provided in any embodiment of this utility model.

[0080] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0081] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coupler with integrated impedance detection, characterized by, The application relates to a kind of impedance detection modules, including: first shell, metal column, coupling circuit board, fixed structure and impedance detection module; The metal column is located in the cavity in the first shell; The first surface of the first shell includes a slit, part of the coupling circuit board passes through the slit and is located in the cavity in the first shell, and the remaining coupling circuit board protrudes from the first surface; In the width direction of the coupling circuit board, the width of the slit is greater than the width of the coupling circuit board; In the width direction of the coupling circuit board, the fixed structure is located on one side of the coupling circuit board, and the fixed structure is used to fix the coupling circuit board on the first shell; The impedance detection module is located on the second surface of the first shell away from the first surface, wherein the first surface and the second surface are oppositely arranged. The fixed structure and the first shell are detachably connected; 2. The integrated impedance detection coupler of claim 1, wherein, The fixed structure and the coupling circuit board are detachably connected. It also includes input conductive column, output conductive column, forward coupling conductive column and reverse coupling conductive column; 3. The integrated impedance detection coupler of claim 1, wherein, The first end of the input conductive column is electrically connected to the first end of the metal column, and the second end of the input conductive column protrudes from the first surface; The first end of the output conductive column is electrically connected to the second end of the metal column, and the second end of the output conductive column protrudes from the second surface; The forward coupling conductive column is electrically connected to the first input end of the coupling circuit board, and the reverse coupling conductive column is electrically connected to the second input end of the coupling circuit board; The forward coupling conductive column and the reverse coupling conductive column are located on the side of the first surface away from the second surface. The fixed structure includes a first fixed plate and a second fixed plate; 4. The integrated impedance detection coupler of claim 1, wherein, The first fixed plate and the second fixed plate are integrally connected; The first fixed plate and the first shell are detachably connected, and the second fixed plate and the coupling circuit board are detachably connected; In the length direction of the coupling circuit board, the length of the first fixed plate is less than the length of the coupling circuit board, and the length of the second fixed plate is less than the length of the coupling circuit board. It also includes a first insulating hollow column and a second insulating hollow column; 5. The integrated impedance detection coupler of claim 3, wherein, The first insulating hollow column wraps the input conductive column protruding from the first surface; The second insulating hollow column wraps the output conductive column protruding from the second surface. The impedance detection module includes a coupling plate, a current detection unit, a voltage detection unit, a current output end and a voltage output end; 6. The integrated impedance detection coupler of claim 5, wherein, The coupling plate includes a through hole, and the through hole surrounds the second insulating hollow column; The current detection unit is electrically connected to the coupling plate and the current output end; The voltage detection unit is electrically connected to the coupling plate and the voltage output end. It also includes a second shell; 7. The integrated impedance detection coupler of claim 1, wherein, The second shell is located on the side of the second surface away from the first surface; The second shell is used to wrap the impedance detection module. In the width direction of the coupling circuit board, the difference between the width of the slit and the width of the coupling circuit board is in the range of 0.1mm-8mm.

8. The integrated impedance detection coupler of claim 1, wherein, The shape of the first shell includes a rectangular parallelepiped; 9. The integrated impedance detection coupler of claim 1, wherein, The shape of the metal column is a cylinder. ​ 10. A power amplifier, characterized by A coupler comprising the integrated impedance detection of any of claims 1-9.

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