Structure and method for eliminating microwave signal slot coupling

Abstract

The invention provides a structure and method for eliminating microwave signal slot coupling, the structure for eliminating microwave signal slot coupling comprises a box body, a circuit board and a stop block, the box body is provided with an accommodating cavity, and the box body is respectively connected with a microwave input joint and a microwave output joint; the circuit board is arranged in the accommodating cavity, and a coupling gap is formed between the circuit board and the inner side wall of the box body; and the stop block is inserted into the coupling gap, is positioned between the microwave input connector and the microwave output connector, is connected to the box body and the circuit board, and is used for blocking a microwave transmission path. The invention provides a structure and a method for eliminating microwave signal slot coupling, and aims to solve the problems of insufficient stability and reliability and poor performance of a micro-slot coupling suppression mode in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave signal transmission, and more particularly, relates to a structure and method for eliminating microwave signal gap coupling. Background Art

[0002] Microwave components typically consist of a metal box with a built-in circuit board. Assembly requirements inevitably create a structural gap between the circuit board and the box. When the component is integrated into a complete system, if its input / output ports are close together, microwave signals from the input port may couple through the gap to the output port, generating spurious signals. These spurious signals can interfere with the normal operation of the entire system and must therefore be suppressed to an acceptable level.

[0003] Currently, conventional methods for suppressing slot coupling include the following two approaches: one is to partially bulge the box and design the slot into a special-shaped structure to increase the transmission path of the microwave signal and reduce reflection loss, thereby reducing the coupling energy; the other is to fill the gap between the box and the circuit board with conductive material (such as copper foil) to reduce the size of the gap and suppress microwave leakage. However, due to the limitations of machining precision and assembly errors, the actual effect may deviate from the theoretical simulation. The long-term stability and contact reliability of the conductive filling material can also affect the final performance. Therefore, a more efficient and reliable slot coupling suppression solution is urgently needed to meet the stringent requirements of high-precision microwave systems. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure and method for eliminating microwave signal slot coupling, aiming to solve the problems of insufficient stability and reliability and poor performance of the existing method for suppressing micro-slot coupling.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, a structure for eliminating microwave signal slot coupling is provided, comprising: The box body has a accommodating cavity, and the box body is respectively connected to a microwave input connector and a microwave output connector; a circuit board, disposed in the accommodating cavity, with a coupling gap formed between the circuit board and the inner side wall of the box body; and A blocking block is inserted into the coupling gap and located between the microwave input connector and the microwave output connector. The blocking block is connected to the box body and the circuit board and is used to block the transmission path of the microwave.

[0006] In combination with the first aspect, in a possible implementation, the structure for eliminating microwave signal gap coupling also includes a positioning post provided on the box body or the blocking block. When the positioning post is provided on the blocking block, the box body is provided with a positioning groove adapted to the positioning post, and the positioning groove is connected to the accommodating cavity; when the positioning post is provided on the box body, the blocking block is provided with a positioning groove adapted to the positioning post; the positioning post is plugged into and fitted with the positioning groove.

[0007] In combination with the first aspect, in a possible implementation manner, the blocking block is coated with a first metal plating layer.

[0008] In combination with the first aspect, in a possible implementation, the side wall of the circuit board has a mounting area for connecting to the blocking block, and the structure for eliminating microwave signal gap coupling further includes a second metal plating layer provided in the mounting area.

[0009] In combination with the first aspect, in a possible implementation, the side wall of the circuit board is provided with a mounting groove for accommodating the blocking block, the blocking block has a connecting portion inserted into the mounting groove, the second metal plating layer includes a metal area and a flange connected to the outer edge of the metal area, the metal area is located in the mounting groove, and the flange is located outside the mounting groove.

[0010] In combination with the first aspect, in a possible implementation, a solder layer is provided on the outside of the blocking block, and the solder layer includes a wrapping area wrapped around the outside of the blocking block and a reinforcement area surrounded by the wrapping area, the wrapping area is used to connect with the metal area and the box body, and the reinforcement area is used to connect with the flange.

[0011] In combination with the first aspect, in a possible implementation, the side wall of the box body has a connection area for connecting to the blocking block, and the structure for eliminating microwave signal gap coupling further includes a third metal plating layer provided in the connection area.

[0012] In combination with the first aspect, in a possible implementation, the blocking block includes a blocking body and a plurality of connecting rings sleeved outside the blocking body, wherein one of the connecting rings is attached to the inner wall of the box body, and another of the connecting rings is attached to the side wall of the circuit board.

[0013] In combination with the first aspect, in a possible implementation, a closed weight-reducing cavity is provided in the blocking block.

[0014] The beneficial effects of the microwave signal slot coupling elimination structure provided by the present invention are as follows: Compared with the prior art, the microwave signal slot coupling elimination structure of the present invention effectively blocks the microwave signal coupling path by disposing a blocking block within the coupling gap between the microwave input connector and the microwave output connector. Compared with the prior art, firstly, the plug-in design of the blocking block directly cuts off the microwave signal transmission channel, achieving signal isolation at a physical level. Its suppression effect is not affected by machining accuracy and assembly errors, and its reliability is significantly higher than that of the special-shaped slot structure. Secondly, this solution does not require the use of conductive filler materials, avoiding performance degradation caused by material aging or poor contact, and improving long-term stability. Thirdly, the blocking block has a simple structure, is easy to manufacture and assemble, and its size and position can be flexibly adjusted according to actual needs, adapting to the needs of microwave components of different frequency bands and power levels, and having high versatility. Finally, this structure achieves efficient isolation by simply adding the blocking block while maintaining the original box design. This not only reduces modification costs but also ensures compatibility with existing processes. It is particularly suitable for high-precision microwave system applications with stringent requirements for stray signal suppression. The present invention not only simplifies the production process by introducing blocking blocks, but also improves the stability of components in complex environments. It is particularly suitable for high-precision systems with strict requirements on microwave signal integrity, and has comprehensive advantages such as simple structure, easy installation, and long-lasting performance.

[0015] In a second aspect, an embodiment of the present invention further provides a method for eliminating microwave signal slot coupling, comprising: S100, electroplating a conductive layer on the inner wall of the box body and the outer wall of the circuit board respectively; S200, electroplating a conductive layer on the outer surface of a blocking block, and placing the blocking block between the box body and the circuit board, the blocking block corresponding to the microwave input port or the microwave output port; S300: Welding the box body and the circuit board to the blocking block respectively.

[0016] The beneficial effect of the method for eliminating microwave signal gap coupling provided by the present invention is that, compared with the existing technology, the method effectively solves the problem of signal coupling in traditional microwave components by combining the electroplating welding process with the blocking block. By electroplating a conductive layer on the surface of the box body, circuit board and blocking block and adopting a welding process, a low-impedance electrical connection between the three is achieved, which significantly improves the microwave isolation performance. Its suppression effect far exceeds that of the special-shaped gap structure and conductive filling material solution. This method uses the electroplating layer to ensure the high conductivity and long-term stability of the contact surface, avoiding the performance degradation problem of traditional conductive materials caused by oxidation or poor contact. The welding process forms a rigid connection between the blocking block and the box body and circuit board, with higher mechanical stability and the ability to adapt to vibration and temperature changes in complex environments. In addition, the method is simple in process and cost-controlled. It maintains the compactness of the original structure without the need for complex processing, and is particularly suitable for high-density integrated microwave systems. The present invention can flexibly adjust the position and size of the blocking block according to the requirements of different frequency bands. It has excellent versatility and scalability and can meet the stringent requirements of high-precision microwave applications for signal integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A cross-sectional view of a structure for eliminating microwave signal slot coupling provided in the first embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of part A in the middle; Figure 3 A cross-sectional view of a blocking block used in the second embodiment of the present invention; Figure 4 A cross-sectional view of a blocking block used in a third embodiment of the present invention; Figure 5 This is a cross-sectional view of the blocking block used in the fourth embodiment of the present invention.

[0019] In the figure: 1. Box body; 101. Coupling gap; 2. Circuit board; 3. Microwave input connector; 4. Microwave output connector; 5. Blocking block; 501. Weight-reducing cavity; 502. Positioning column; 503. Blocking body; 504. Connecting ring; 6. Soldering layer; 601. Wrapping area; 602. Reinforcement area; 7. Second metal plating layer; 701. Flanging; 702. Metal area; 8. First gold plating layer. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third" are used to distinguish different objects, rather than to describe a specific order. Unless otherwise specified, other directional words, such as "vertical", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention. In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without a displacement relationship or relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements. In the claims, specification and the above-mentioned drawings of the present invention, the terms "including", "having" and their variations are intended to mean "including but not limited to".

[0022] Please also refer to Figures 1 to 5 The structure and method for eliminating microwave signal gap coupling provided by the present invention are now described. The structure for eliminating microwave signal gap coupling comprises a box body 1, a circuit board 2, and a blocking block 5. The box body 1 has a receiving cavity, to which a microwave input connector 3 and a microwave output connector 4 are connected. The circuit board 2 is disposed within the receiving cavity, forming a coupling gap 101 between the circuit board 2 and the inner wall of the box body 1. The blocking block 5 is inserted into the coupling gap 101 and is located between the microwave input connector 3 and the microwave output connector 4. The blocking block 5 is connected to the box body 1 and the circuit board 2 to block the transmission path of the microwaves.

[0023] Compared to the prior art, the structure for eliminating microwave signal slot coupling provided by the present invention effectively blocks the coupling path of microwave signals transmitted through the coupling gap 101 by disposing a blocking block 5 within the coupling gap 101 between the microwave input connector 3 and the microwave output connector 4. Compared to the prior art, firstly, the plug-in design of the blocking block 5 directly cuts off the microwave signal transmission channel, achieving signal isolation at a physical level. Its suppression effect is unaffected by machining accuracy and assembly errors, and its reliability is significantly higher than that of a special-shaped slot structure. Secondly, this solution does not require the use of conductive filler materials, avoiding performance degradation caused by material aging or poor contact, and improving long-term stability. Furthermore, the blocking block 5 has a simple structure, is easy to manufacture and assemble, and its size and position can be flexibly adjusted according to actual needs, adapting to the needs of microwave components of different frequency bands and power levels, and having high versatility. Finally, this structure achieves efficient isolation by simply adding the blocking block 5, while maintaining the original design of the box body 1. This reduces modification costs while ensuring compatibility with existing processes. It is particularly suitable for high-precision microwave systems with stringent requirements for spurious signal suppression. The present invention not only simplifies the production process by introducing the blocking block 5, but also improves the stability of the component in complex environments. It is particularly suitable for high-precision systems with strict requirements on microwave signal integrity, and has comprehensive advantages such as simple structure, easy installation, and long-lasting performance.

[0024] Optionally, the blocking block 5 is an alloy component, such as an aluminum alloy component.

[0025] In some embodiments, see Figures 1 to 4 The structure for eliminating gap coupling of microwave signals also includes a positioning post 502 provided on the box body 1 or the blocking block 5. When the positioning post 502 is provided on the blocking block 5, the box body 1 is provided with a positioning groove adapted to the positioning post 502, and the positioning groove is connected to the accommodating cavity; when the positioning post 502 is provided on the box body 1, the blocking block 5 is provided with a positioning groove adapted to the positioning post 502; the positioning post 502 is plugged into the positioning groove.

[0026] This embodiment further improves the accuracy and reliability of the installation of the blocking block 5 by adding a plug-in matching structure of the positioning post 502 and the positioning groove. The precise matching of the positioning post 502 and the positioning groove ensures the accurate positioning of the blocking block 5 between the box body 1 and the circuit board 2, effectively avoiding the problem of reduced isolation performance caused by assembly deviation. This structure can be temporarily fixed before welding, which greatly simplifies the assembly process and improves production efficiency. The mechanical limit formed by the plug-in matching can prevent the blocking block 5 from being displaced during the welding process, ensuring the consistency of the welding quality. In addition, the design can set the positioning post 502 on both the box body 1 and the blocking block 5, and has a flexible implementation method that can adapt to different structural layout requirements. The positioning structure in this solution can maintain the position stability of the blocking block 5 during long-term use, avoid poor contact due to vibration or temperature changes, and is particularly suitable for microwave component applications in harsh environments such as aerospace.

[0027] Optionally, the positioning post 502 may be a cylindrical or polyhedral structure.

[0028] Optionally, a plurality of positioning posts 502 are provided, and the positioning grooves correspond one to one to the positioning posts 502 .

[0029] In some embodiments, see Figure 5 The blocking block 5 is wrapped with a first metal plating layer.

[0030] The present invention significantly improves the reliability and stability of microwave signal isolation by wrapping the first metal coating on the outer surface of the blocking block 5. The first metal coating not only ensures a low-impedance electrical connection between the blocking block 5 and the box body 1 and the circuit board 2, effectively blocking the leakage path of high-frequency signals, but also greatly enhances the conductivity and corrosion resistance of the contact surface, avoiding the problem of increased contact resistance due to surface oxidation. At the same time, the wrapping process of the first metal coating makes the surface of the blocking block 5 smoother and more uniform, and the contact with the box body 1 and the circuit board 2 is closer, further reducing the possibility of signal leakage. In addition, by optimizing the coating material and thickness, the design can achieve the best isolation effect for microwave signals of different frequency bands and has excellent frequency adaptability; more importantly, the metal coating wrapping process is mature and reliable, with controllable costs. It can significantly improve the long-term stability and environmental adaptability of microwave components without increasing excessive production costs. It is particularly suitable for high-end microwave system applications with extremely high signal integrity requirements.

[0031] Optionally, the first metal plating layer is a gold plating layer or a nickel plating layer.

[0032] In some embodiments, see Figure 2 The side wall of the circuit board 2 has a mounting area for connecting to the blocking block 5, and the structure for eliminating microwave signal gap coupling also includes a second metal plating layer 7 provided in the mounting area.

[0033] The second metal coating 7 and the first metal coating of the blocking block 5 form a double conductive barrier, achieving a more reliable microwave signal isolation effect. This design forms a low-impedance metallized connection between the circuit board 2 and the blocking block 5, greatly reducing the contact resistance and effectively blocking the leakage path of high-frequency signals through the installation interface. The cooperation between the second metal coating 7 and the first metal coating ensures the conductive continuity of the welding interface and avoids signal crosstalk caused by poor contact. At the same time, the second metal coating 7 enhances the mechanical strength and corrosion resistance of the edge of the circuit board 2, extending the service life of the component; by optimizing the coating process parameters, this structure can accurately control the conductive properties of the contact surface and adapt to the isolation requirements of different frequency bands from low frequency to millimeter wave. Compared with traditional non-metallized connection methods, this solution has more stable contact characteristics and better high-frequency response, and is particularly suitable for microwave module applications with high-density integration and high performance requirements.

[0034] Optionally, the thickness of the second metal coating 7 is greater than 3μm. The thickness of the second metal coating 7 in the mounting area of the circuit board 2 is precisely controlled to be above 3μm, which significantly improves the reliability and high-frequency performance of microwave signal isolation. Compared with the traditional thin coating solution, this thickness design first ensures that the metal coating has sufficient conductive cross-sectional area, reduces the contact resistance to the milliohm level, and effectively eliminates the skin effect of high-frequency signals. The coating thickness of more than 3μm provides better mechanical wear resistance and environmental corrosion resistance, and can maintain stable electrical connection characteristics under harsh working conditions such as long-term vibration and temperature cycling. This optimized thickness can not only ensure good welding wettability, but also avoid the problem of increased processing costs caused by excessively thick coatings, achieving a perfect balance between performance and cost; in addition, this thickness range is particularly suitable for microwave frequency band signal isolation requirements, and can effectively block the leakage path of GHz-level high-frequency signals without introducing additional parasitic capacitance effects.

[0035] Optionally, the second metal plating layer 7 is a gold-nickel alloy layer.

[0036] In some embodiments, see Figures 1 to 2 The side wall of the circuit board 2 is provided with a mounting groove for accommodating the blocking block 5. The blocking block 5 has a connecting portion inserted into the mounting groove. The second metal plating layer 7 includes a metal area 702 and a flange 701 connected to the outer edge of the metal area 702. The metal area 702 is located in the mounting groove, and the flange 701 is located outside the mounting groove. The present invention establishes a mounting slot in the sidewall of the circuit board 2 and provides a second metal coating 7 comprising a metal area 702 and a flange 701. This allows the connection portion of the blocking block 5 to tightly mate with the metal area 702 within the mounting slot. The flange 701 extends beyond the mounting slot to form an extended shielding surface, significantly enhancing the integrity and reliability of microwave signal blocking. This structure ensures a low-impedance conductive connection through close contact between the metal area 702 and the blocking block 5. The flange 701 design further expands the electromagnetic shielding range, effectively suppressing high-frequency signal diffraction and leakage. It also enhances the robustness of the mechanical connection and prevents contact failure caused by vibration or temperature fluctuations. This makes it particularly suitable for high-frequency, high-power microwave systems, offering advantages such as low contact resistance, wide shielding coverage, and strong resistance to mechanical stress, ensuring excellent signal isolation performance for long-term stable operation.

[0037] In some embodiments, see Figure 2 A soldering layer 6 is provided on the outside of the blocking block 5, and the soldering layer 6 includes a wrapping area 601 wrapped around the outside of the blocking block 5 and a reinforcement area 602 surrounded by the wrapping area 601. The wrapping area 601 is used to connect with the metal area 702 and the box body 1, and the reinforcement area 602 is used to connect with the flange 701.

[0038] The present invention provides a solder layer 6 having a wrapping area 601 and a reinforcement area 602 on the exterior of the blocking block 5, thereby forming a reliable welded connection between the wrapping area 601, the metal area 702 within the mounting slot of the circuit board 2, and the housing 1. Simultaneously, the reinforcement area 602 is tightly bonded to the flange 701. This not only achieves a secure electrical connection between the blocking block 5, the circuit board 2, and the housing 1, ensuring efficient shielding of microwave signals, but also enhances mechanical strength through the extended welding of the reinforcement area 602, effectively resisting the effects of vibration and thermal stress, and improving long-term environmental stability. Through the optimized design of the solder layer 6, this structure not only ensures low-impedance electromagnetic shielding performance but also strengthens the overall structure's impact resistance and aging resistance. This makes it particularly suitable for high-precision microwave components in harsh environments, offering comprehensive advantages such as reliable welding, excellent shielding performance, and strong mechanical durability, ensuring excellent signal isolation for long-term stable system operation.

[0039] In some embodiments, not shown in the figures, the side wall of the box body 1 has a connection area for connecting to the blocking block 5, and the structure for eliminating microwave signal gap coupling further includes a third metal coating provided in the connection area. The present invention adds a third metal coating to the connection area of the side wall of the box body 1, so that it, together with the first metal coating of the blocking block 5 and the second metal coating 7 of the circuit board 2, forms a complete triple electromagnetic shielding system, significantly improving the isolation efficiency of microwave signals. Through the reliable contact between the third metal coating and the blocking block 5, this structure effectively fills the potential gap between the box body 1 and the blocking block 5, reducing the contact impedance. At the same time, it forms a synergistic shielding effect with the metal coating on the side of the circuit board 2, completely blocking the multipath coupling of high-frequency signals. Its coating design not only optimizes assembly accuracy and electrical continuity, but also enhances corrosion resistance and long-term environmental stability. It is particularly suitable for high-reliability application scenarios and has the outstanding advantages of full-path shielding, low contact resistance, and strong environmental adaptability, ensuring that microwave components can still maintain excellent signal integrity in complex electromagnetic environments.

[0040] In some embodiments, see Figure 4 The blocking block 5 includes a blocking body 503 and a plurality of connecting rings 504 sleeved on the blocking body 503 , wherein one connecting ring 504 is attached to the inner wall of the box body 1 , and another connecting ring 504 is attached to the side wall of the circuit board 2 . The present invention adopts a blocking block 5 design with a multi-layer connecting ring 504 structure, so that the blocking body 503 forms a tight fit with the inner wall of the box body 1 and the side wall of the circuit board 2 through different connecting rings 504, thereby constructing a multiple electromagnetic shielding barrier. This structure significantly increases the reflection loss and path attenuation of microwave signals through layered contact, effectively suppressing the high-frequency coupling effect. The connecting ring 504 increases the contact area with the box body 1 and the circuit board 2, effectively suppressing the gap coupling phenomenon of microwave signals. In addition, the multi-stage connecting ring 504 works together to form a stepped attenuation, which greatly improves the suppression effect of wide-band stray signals. It is particularly suitable for high-frequency application scenarios such as millimeter waves. It has the advantages of reliable contact, wide-band suppression, and resistance to micro-discharge, providing reliable electromagnetic isolation protection for high-density integrated microwave systems.

[0041] Optionally, a plurality of connecting rings 504 are sequentially arranged at intervals, and the connecting rings 504 at both ends are flush with the surface of the blocking body 503 .

[0042] In some embodiments, see Figure 3 A closed weight-reducing cavity 501 is provided in the blocking block 5 . By providing a closed, lightweight cavity 501 within the blocking block 5, this invention effectively reduces overall weight while ensuring structural strength and electromagnetic shielding performance, while also avoiding the risk of microwave leakage associated with traditional hole-opening weight reduction methods. This lightweight cavity 501 design maintains the blocking block 5's efficient microwave signal blocking capability while also improving the component's lightweightness. It is particularly suitable for weight-sensitive microwave system applications, such as aerospace, offering advantages such as weight optimization, structural strength preservation, and no additional electromagnetic leakage. It also enhances the system's overall power density and portability while maintaining signal isolation performance.

[0043] Based on the same inventive concept, the present invention also provides a method for eliminating microwave signal gap coupling. The method for eliminating microwave signal gap coupling includes: (S100) electroplating a conductive layer on the inner wall of the box body 1 and the outer wall of the circuit board 2; (S200) electroplating a conductive layer on the outer surface of the blocking block 5 and placing the blocking block 5 between the box body 1 and the circuit board 2, with the blocking block 5 corresponding to the microwave input port or the microwave output port; and (S300) soldering the box body 1 and the circuit board 2 to the blocking block 5, respectively.

[0044] The method for eliminating microwave signal gap coupling provided by the present invention effectively solves the problem of signal coupling in traditional microwave components by combining the electroplating welding process with the blocking block 5. By electroplating a conductive layer on the surface of the box body 1, the circuit board 2 and the blocking block 5 and adopting a welding process, a low-impedance electrical connection between the three is achieved, which significantly improves the microwave isolation performance. Its suppression effect far exceeds that of the special-shaped gap structure and the conductive filling material solution. This method uses the electroplating layer to ensure the high conductivity and long-term stability of the contact surface, avoiding the performance degradation problem of traditional conductive materials caused by oxidation or poor contact. The welding process enables the blocking block 5 to form a rigid connection with the box body 1 and the circuit board 2, with higher mechanical stability and the ability to adapt to vibration and temperature changes in complex environments. In addition, the method is simple in process and cost-controlled. It maintains the compactness of the original structure without the need for complex processing, and is particularly suitable for high-density integrated microwave systems. The present invention can flexibly adjust the position and size of the blocking block 5 according to the requirements of different frequency bands. It has excellent versatility and scalability and can meet the stringent requirements of high-precision microwave applications for signal integrity.

[0045] Optionally, the blocking block 5 is connected to the box body 1 and the circuit board 2 by welding.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A structure for eliminating microwave signal gap coupling, characterized in that: include: The box body has a accommodating cavity, and the box body is respectively connected to a microwave input connector and a microwave output connector; A circuit board is disposed in the accommodating cavity, and a coupling gap is formed between the circuit board and the inner side wall of the box body; as well as A blocking block is inserted into the coupling gap and located between the microwave input connector and the microwave output connector. The blocking block is connected to the box body and the circuit board and is used to block the transmission path of the microwave.

2. The structure for eliminating microwave signal slot coupling according to claim 1, wherein: The structure for eliminating microwave signal gap coupling also includes a positioning post provided on the box body or the blocking block. When the positioning post is provided on the blocking block, the box body is provided with a positioning groove adapted to the positioning post, and the positioning groove is connected to the accommodating cavity; when the positioning post is provided on the box body, the blocking block is provided with a positioning groove adapted to the positioning post; the positioning post is plugged into and fitted with the positioning groove.

3. The structure for eliminating microwave signal slot coupling according to claim 1, wherein: The blocking block is coated with a first metal plating layer.

4. The structure for eliminating microwave signal slot coupling according to claim 3, wherein: The side wall of the circuit board has a mounting area for connecting with the blocking block, and the structure for eliminating microwave signal slot coupling further includes a second metal plating layer provided in the mounting area.

5. The structure for eliminating microwave signal slot coupling according to claim 4, wherein: The side wall of the circuit board is provided with a mounting groove for accommodating the blocking block, and the blocking block has a connecting portion inserted into the mounting groove. The second metal plating layer includes a metal area and a flange connected to the outer edge of the metal area. The metal area is located in the mounting groove, and the flange is located outside the mounting groove.

6. The structure for eliminating microwave signal slot coupling according to claim 5, wherein: A solder layer is provided on the outside of the blocking block, and the solder layer includes a wrapping area wrapped around the blocking block and a reinforcement area surrounded by the wrapping area. The wrapping area is used to connect with the metal area and the box body, and the reinforcement area is used to connect with the flange.

7. The structure for eliminating microwave signal slot coupling according to claim 4, wherein: The side wall of the box body has a connection area for connecting with the blocking block, and the structure for eliminating microwave signal gap coupling further includes a third metal plating layer provided in the connection area.

8. The structure for eliminating microwave signal slot coupling according to claim 1, wherein: The blocking block includes a blocking body and a plurality of connecting rings sleeved on the blocking body, wherein one of the connecting rings is attached to the inner wall of the box body, and another of the connecting rings is attached to the side wall of the circuit board.

9. The structure for eliminating microwave signal slot coupling according to claim 1, wherein: A closed weight-reducing cavity is provided in the blocking block.

10. A method for eliminating microwave signal gap coupling, characterized in that: include: S100, electroplating a conductive layer on the inner wall of the box body and the outer wall of the circuit board respectively; S200, electroplating a conductive layer on the outer surface of a blocking block, and placing the blocking block between the box body and the circuit board, the blocking block corresponding to the microwave input port or the microwave output port; S300: Welding the box body and the circuit board to the blocking block respectively.

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