Capacitive coupling assembly and filter

Abstract

The invention relates to the field of communication, and provides a capacitive coupling assembly and a filter. The capacitive coupling assembly comprises a coupling piece, a mounting piece and a flow guide piece, the coupling piece is relatively fixedly arranged between the two resonance rods and is not grounded, the coupling piece comprises a first coupling part and a second coupling part which are oppositely arranged at an interval, and the coupling piece is provided with a slide way located between the first coupling part and the second coupling part; the slideway is arranged along the axial direction of the coupling piece in a penetrating manner; at least one ends of the first coupling part and the second coupling part are in an open-circuit state; the mounting piece is movably mounted on the first plate piece or the second plate piece; the flow guide piece is connected to the installation piece and can be driven by the installation piece to axially move in the sliding way, and the peripheral face of the flow guide piece abuts against the first coupling part and the second coupling part. Based on the structure, the capacitive coupling assembly can realize continuous adjustment and linear adjustment of the capacitive coupling amount, the adjustment difficulty is relatively low, the adjustment is convenient, rapid, accurate and controllable, the adjustability and the adjustability flexibility are relatively good, and the adjustable range is relatively large.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a capacitive coupling component and a filter. Background Art

[0002] In some cases, the filter includes a filter housing, a plurality of resonant rods, and at least one capacitive coupling assembly, all disposed within the filter housing. The capacitive coupling assembly includes a mounting member rotatably mounted to a wall of the filter housing, and a coupling member mounted to the mounting member. The coupling member is disposed between two resonant rods and is used to capacitively couple the two resonant rods. The coupling member can rotate circumferentially with the mounting member to change the coupling area of ​​the coupling member relative to the two resonant rods, thereby adjusting the capacitive coupling amount between the two resonant rods. However, in this manner, the adjustment of the capacitive coupling amount is nonlinear and has a small adjustable range, which affects the adjustment convenience, adjustment accuracy, and debugging efficiency of the capacitive coupling assembly. Summary of the Invention

[0003] The embodiments of the present application provide a capacitive coupling component and a filter, which aim to solve the problem that the adjustment of the capacitive coupling amount is nonlinear and the adjustable range is small, resulting in greater difficulty in adjusting the capacitive coupling component.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0005] In a first aspect, a capacitive coupling assembly is provided, which is disposed in a filter housing and between two resonant rods, wherein the filter housing has a first plate and a second plate disposed opposite to each other, and the resonant rod is connected to the second plate. The capacitive coupling assembly includes:

[0006] a coupling member fixedly disposed relatively between the two resonant rods and not grounded, the coupling member comprising a first coupling portion and a second coupling portion spaced apart and disposed opposite to each other, the coupling member having a slideway disposed between the first coupling portion and the second coupling portion, the slideway being disposed through the coupling member along an axial direction, and at least one end of the first coupling portion and the second coupling portion being in an open circuit state;

[0007] a mounting member, movably mounted on the first plate member or the second plate member;

[0008] The flow guide is connected to the mounting member and can be axially moved in the slideway under the drive of the mounting member. The outer peripheral surface of the flow guide abuts against the first coupling portion and the second coupling portion.

[0009] In some embodiments, the coupling member includes a connecting portion, the connecting portion extending along the circumference of the slideway and connected between the first coupling portion and the second coupling portion;

[0010] The connecting portion is located at the ends of the first coupling portion and the second coupling portion that are close to the first plate; or, the connecting portion is located at the ends of the first coupling portion and the second coupling portion that are away from the first plate; or, the connecting portion is located in the middle of the first coupling portion and the second coupling portion.

[0011] In some embodiments, the coupling member is a cylindrical structure with a truncation groove extending through the cylindrical wall, and the truncation groove is extended along the axial direction of the coupling member.

[0012] In some embodiments, the capacitive coupling component includes an insulating seat, which is arranged between the end side of the coupling member and the corresponding plate of the filter housing and is fixed relative to the filter housing. The insulating seat is provided with a limiting groove, and the coupling member is interference-fitted into the limiting groove.

[0013] In some embodiments, the insulating seat is provided with a locking protrusion, and the locking protrusion is locked in the gap between the first coupling portion and the second coupling portion to limit the circumferential rotation of the coupling member.

[0014] In some embodiments, the capacitive coupling assembly includes a dielectric cylinder, and the coupling member and the flow guide member are both disposed inside the dielectric cylinder.

[0015] In some embodiments, the capacitive coupling assembly includes a dielectric cylinder, the coupling member and the flow guide member are both arranged in the cylinder of the dielectric cylinder; the insulating seat and the dielectric cylinder are an integrated structure.

[0016] In some embodiments, opposite ends of the medium cylinder are respectively in contact with the first plate and the second plate.

[0017] In some embodiments, the guide member is fixedly connected to the mounting member so that the guide member moves axially synchronously with the mounting member.

[0018] In some embodiments, the cross-sectional shape of the slideway and the cross-sectional shape of the guide member are both circular, and the guide member rotates circumferentially and moves axially synchronously with the mounting member.

[0019] In some embodiments, the mounting member is a screw, the capacitive coupling assembly includes a nut, and one end of the mounting member away from the flow guide member is inserted into a corresponding plate of the filter housing and is threadedly connected to the nut.

[0020] In some embodiments, the mounting member is an insulating member.

[0021] In a second aspect, a filter is provided, comprising a filter housing, a plurality of resonant rods, and at least one capacitive coupling component provided in an embodiment of the present application, wherein the capacitive coupling component and the resonant rod are both arranged in the filter housing.

[0022] The capacitive coupling component provided by this application has the following beneficial effects:

[0023] The capacitive coupling component provided in the embodiment of the present application can achieve capacitive coupling of the two resonant rods by means of a coupling member that is relatively fixed and not grounded between the two resonant rods; a flow guide member can be installed and supported by means of a mounting member that can be movably mounted on the first plate or the second plate, and can be driven to move axially in the slideway of the coupling member; a flow guide member that can be axially moved in the slideway and whose outer peripheral surface abuts the first coupling part and the second coupling part can form a current conduction path between the first coupling part and the second coupling part, at least one end of which is in an open-circuit state, to promote current to flow along the open-circuit path formed by the first coupling part, the flow guide member, and the second coupling part. Based on this, the capacitive coupling component can achieve capacitive coupling of the two resonant rods with an optimized and reliable structure. In addition, the capacitive coupling component can drive the guide member to move axially in the slide through the mounting member to adjust the axial position of the guide member and the current conduction path, and adjust the length of the open circuit path formed by the first coupling part, the guide member and the second coupling part, adjust the effective coupling area of ​​the coupling member, and adjust the effective axial height of the coupling member involved in the coupling, so as to achieve continuous adjustment and linear adjustment of the capacitive coupling amount. The adjustment difficulty is low, and the adjustment is convenient, fast, accurate and controllable. The adjustability and adjustable flexibility are better, and the adjustable range of the capacitive coupling amount is larger, which is conducive to improving the adjustment convenience, adjustment accuracy and debugging efficiency of the capacitive coupling component, and can enable the capacitive coupling component to adapt to different coupling requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A three-dimensional schematic diagram of a filter provided in some embodiments of the present application;

[0026] Figure 2 for Figure 1 A top view of the provided filter;

[0027] Figure 3 for Figure 2A cross-sectional view along AA is provided, wherein the connecting portion is located at the ends of both the first coupling portion and the second coupling portion close to the first plate and is not shown because it is obscured by the mounting member;

[0028] Figure 4 for Figure 1 A decomposition diagram of the provided filter;

[0029] Figure 5 Cross-sectional views of filters provided in other embodiments of the present application, wherein the connecting portion is located at ends of the first coupling portion and the second coupling portion that are close to the first plate, the ends of the first coupling portion and the second coupling portion that are away from the first plate are in an open circuit state, and the mounting member is movably mounted on the second plate;

[0030] Figure 6 Cross-sectional views of filters provided in other embodiments of the present application, wherein the connecting portion is located at ends of the first coupling portion and the second coupling portion away from the first plate, the ends of the first coupling portion and the second coupling portion close to the first plate are in an open circuit state, and the mounting member is movably mounted on the first plate;

[0031] Figure 7 Cross-sectional views of filters provided in other embodiments of the present application, wherein the ends of the first coupling portion and the second coupling portion close to the first plate are in an open circuit state, the mounting member is movably mounted on the second plate, and the connecting portion is located at the ends of the first coupling portion and the second coupling portion away from the first plate and is not shown because it is obscured by the mounting member;

[0032] Figure 8 Cross-sectional views of filters provided in other embodiments of the present application, wherein the connecting portion is located in the middle of the first coupling portion and the second coupling portion, the opposite ends of the first coupling portion and the second coupling portion are both in an open circuit state, and the mounting member is movably mounted on the second plate;

[0033] Figure 9 A current diagram provided in an embodiment of the present application when only a coupling member is provided between two resonant rods, wherein the lower ends of the first coupling portion and the second coupling portion are both in an open circuit state;

[0034] Figure 10 for Figure 9 A current diagram is provided when a coupling member, a flow guide member and a mounting member are provided between two resonant rods;

[0035] Figure 11 for Figure 4 A schematic perspective view of the coupling member is provided;

[0036] Figure 12 for Figure 4 A three-dimensional cross-sectional view of an insulating seat and a dielectric cylinder is provided, wherein the insulating seat and the dielectric cylinder are an integrated structure.

[0037] Among them, the reference numerals in the figures are:

[0038] 10-capacitive coupling component, 11-coupling member, 111-first coupling part, 112-second coupling part, 113-slide, 114-connecting part, 115-truncation groove, 12-mounting member, 13-flow guide member, 14-insulating seat, 141-limiting groove, 142-locking protrusion, 143-avoidance hole, 15-dielectric cylinder, 16-nut, 20-filter housing, 21-first plate, 22-second plate, 30-resonance rod, 40-base, 50-coupling rib. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clear and understandable, the application is described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined with each other to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions.

[0040] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0042] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0043] In the present application, the "central axis" refers to a line passing through the geometric center line of the corresponding structure.

[0044] In the present application, “axial” refers to the extension direction of the central axis of the corresponding structure, “circumferential” refers to the circumferential direction around the central axis of the corresponding structure, and “radial” refers to any direction of the corresponding structure passing through the central axis and perpendicular to the central axis.

[0045] In some cases, the filter includes a filter housing, a plurality of resonant rods, and at least one capacitive coupling assembly, all disposed within the filter housing. The capacitive coupling assembly includes a mounting member rotatably mounted to a wall of the filter housing, and a coupling member mounted to the mounting member. The coupling member is disposed between two resonant rods and is used to capacitively couple the two resonant rods. The coupling member can rotate circumferentially with the mounting member to change the coupling area of ​​the coupling member relative to the two resonant rods, thereby adjusting the capacitive coupling amount between the two resonant rods. However, in this manner, the adjustment of the capacitive coupling amount is nonlinear and has a small adjustable range, which affects the adjustment convenience, adjustment accuracy, and debugging efficiency of the capacitive coupling assembly.

[0046] The embodiments provided in this application will solve the above problems.

[0047] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0048] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4Some embodiments of the present application provide a capacitive coupling component 10, which is arranged in a filter housing 20 and between two resonant rods 30. The filter housing 20 has a first plate 21 and a second plate 22 arranged opposite to each other, and the resonant rod 30 is connected to the second plate 22. The capacitive coupling component 10 includes a coupling member 11, a mounting member 12 and a flow guide member 13. The coupling member 11 is relatively fixed and not grounded between the two resonant rods 30. The coupling member 11 includes a first coupling portion 111 and a second coupling portion 112 that are spaced apart and relatively arranged. The coupling member 11 has a slide 113 located between the first coupling portion 111 and the second coupling portion 112. The slide 113 is arranged to pass through the coupling member 11 along the axial direction. At least one end of the first coupling portion 111 and the second coupling portion 112 is in an open circuit state; the mounting member 12 can be movably mounted on the first plate 21 or the second plate 22; the flow guide member 13 is connected to the mounting member 12 and can be axially moved in the slide 113 under the drive of the mounting member 12. The outer peripheral surface of the flow guide member 13 abuts against the first coupling portion 111 and the second coupling portion 112.

[0049] It should be noted that the capacitive coupling component 10 can be applied to filter products.

[0050] The filter includes a filter housing 20. The interior of the filter housing 20 has a closed inner cavity, which can achieve a shielding function and prevent signal leakage. The plate on one side of the filter housing 20 is a first plate 21, and the plate on the side of the filter housing 20 opposite to the first plate 21 is a second plate 22. In actual application scenarios, the filter can be placed with the first plate 21 facing upward, or with the first plate 21 facing left, right, front or back. In addition, the shape, size, material, etc. of the filter housing 20 can be flexibly set as needed.

[0051] The filter also includes a plurality of resonant rods 30 disposed within the filter housing 20. The plurality of resonant rods 30 are arranged as required and establish the desired coupling relationship. The resonant rods 30 are connected to the second plate 22 and spaced apart from the first plate 21. That is, one end of the resonant rod 30 can be connected and fixed to the second plate 22 directly or via other components to be fixed relative to the filter housing 20. The end of the resonant rod 30 away from the second plate 22 is spaced apart from the first plate 21, forming a flat plate capacitor therebetween. As a result, the electric field is primarily concentrated near the first plate 21 (i.e., the first plate 21 is the plate near the location where the electric field is concentrated), and the magnetic field is primarily concentrated near the second plate 22. The resonant rods 30 can be directly connected and fixed to the second plate 22 by, but not limited to, integral connection, welding, riveting, crimping, plugging, screw fastening, threaded connection, or snap-fitting, or can be indirectly connected and fixed to the second plate 22 via other structures connected thereto (e.g., a base 40, a mounting post, a coupling rib 50, or other structures). Among them, the resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod or a dielectric resonant rod of other materials; the resonant rod 30 can be a hollow resonant rod or a solid resonant rod; the resonant rod 30 can be with a resonant disk or without a resonant disk; the resonant disk can be with a flange or without a flange; the resonant rod 30 can be a round rod, a polygonal rod, a special-shaped rod, a sheet resonant rod, a sheet metal resonant rod or other forms of resonant rod, etc.

[0052] The capacitive coupling component 10 can be disposed between any two resonant rods 30 to achieve capacitive coupling between the two resonant rods 30 .

[0053] The capacitive coupling component 10 can be disposed between two adjacent resonant rods 30 to achieve capacitive coupling between the two resonant rods 30. Two adjacent resonant rods 30, i.e., the two resonant rods 30 are adjacent on the main signal transmission path, that is, the coupling achieved between the two resonant rods 30 via the capacitive coupling component 10 is a coupling relationship on the main signal transmission path, that is, the coupling relationship between the two resonant rods 30 is cascaded.

[0054] When there are at least three resonant rods 30, the capacitive coupling assembly 10 can be disposed between two non-adjacent resonant rods 30 to achieve capacitive cross-coupling between the two resonant rods 30. The two non-adjacent resonant rods 30, i.e., the two resonant rods 30 are non-adjacent in the main signal transmission path, and the coupling between the two resonant rods 30 via the capacitive coupling assembly 10 is cross-coupling, that is, the coupling relationship between the two resonant rods 30 is non-cascade.

[0055] It should also be noted that the capacitive coupling component 10 includes a coupling member 11. The coupling member 11 can be a metal member as a whole, or it can be coated with a metal layer (the portion used to support the metal layer can be made of a non-metallic material). The coupling member 11 is relatively fixedly arranged between the two resonant rods 30, so that the installation position and installation state of the coupling member 11 are firm and stable relative to the filter housing 20 and the two resonant rods 30; the coupling member 11 is not grounded, that is, the coupling member 11 is not grounded to the first plate 21 and the second plate 22, so that the coupling member 11 can reliably achieve capacitive coupling between the two resonant rods 30.

[0056] The coupling member 11 includes a first coupling portion 111 and a second coupling portion 112. The first coupling portion 111 and the second coupling portion 112 are arranged relative to each other at an interval. The first coupling portion 111 is closer to one of the resonant rods 30 than the second coupling portion 112, and the second coupling portion 112 is closer to the other resonant rod 30 than the first coupling portion 111, so that the coupling member 11 can be coupled to the two resonant rods 30 respectively via the first coupling portion 111 and the second coupling portion 112.

[0057] The coupling member 11 is provided with a slideway 113 . The slideway 113 is provided between the first coupling portion 111 and the second coupling portion 112 . The slideway 113 extends along the axial direction of the coupling member 11 and penetrates the coupling member 11 .

[0058] At least one end of the first coupling portion 111 and the second coupling portion 112 is in an open circuit state. Figure 3 、 Figure 4 、 Figure 5 As shown, in some embodiments, the first coupling portion 111 and the second coupling portion 112 may be disconnected from each other and in an open circuit state only at the ends away from the first plate 21. Figure 6 、 Figure 7 As shown, in other embodiments, the first coupling portion 111 and the second coupling portion 112 may be disconnected from each other only at the ends close to the first plate 21 and be in an open circuit state. Figure 8 As shown, in other embodiments, both ends of the first coupling portion 111 and the second coupling portion 112 may be in an open-circuit state, that is, the ends of the two portions close to the first plate 21 are not conductive to each other and are in an open-circuit state, and the ends of the two portions away from the first plate 21 are also not conductive to each other and are in an open-circuit state.

[0059] It should also be noted that the capacitive coupling assembly 10 includes a flow guide 13. The flow guide 13 can be entirely metal or coated with a metal layer (the portion supporting the metal layer can be made of a non-metallic material). The flow guide 13 is axially movable in the slideway 113. The outer peripheral surface of the flow guide 13 abuts the side of the first coupling portion 111 facing the flow guide 13, and abuts the side of the second coupling portion 112 facing the flow guide 13, so that the flow guide 13 can form a current conduction path between the first coupling portion 111 and the second coupling portion 112.

[0060] Based on this, Figure 3 、 Figure 5 As shown, in the case where the first coupling portion 111 and the second coupling portion 112 are only not connected to each other at the ends away from the first plate 21 and are in an open circuit state, if the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112 (such as Figure 9 As shown in FIG5 ), the current flows roughly along the zigzag path of “the open-circuit end of the first coupling portion 111 (i.e., the end of the first coupling portion 111 away from the first plate 21), the closed-circuit ends of the first coupling portion 111 and the second coupling portion 112 (i.e., the end of the first coupling portion 111 close to the first plate 21 and the end of the second coupling portion 112 close to the first plate 21), and the open-circuit end of the second coupling portion 112 (i.e., the end of the second coupling portion 112 away from the first plate 21)”; as shown in FIG5 ; Figure 10As shown, if a flow guide 13 is provided between the first coupling portion 111 and the second coupling portion 112, the flow guide 13 will form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, so that the closed ends of the first coupling portion 111 and the second coupling portion 112 are short-circuited by the flow guide 13, so that the current flows in the open-circuit path formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112, so that the current flows roughly along the bending path of "the open-circuit end of the first coupling portion 111 (that is, the end of the first coupling portion 111 away from the first plate 21), the flow guide 13, and the open-circuit end of the second coupling portion 112 (that is, the end of the second coupling portion 112 away from the first plate 21)". Therefore, during the axial movement of the guide member 13 in the slide 113, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 will change accordingly, and the effective coupling area of ​​the coupling member 11 (that is, the open-circuit part formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted. Specifically, if the guide member 13 moves along the open-circuit end away from the first coupling part 111 and the second coupling part 112 (in this case, it moves in the direction close to the first plate 21), the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 gradually increases, and the effective axial height of the coupling member 11 participating in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves along the open-circuit end close to the first coupling part 111 and the second coupling part 112 (in this case, it moves in the direction away from the first plate 21), the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 gradually decreases, and the effective axial height of the coupling member 11 participating in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0061] like Figure 6 、 Figure 7As shown, in the case where the first coupling portion 111 and the second coupling portion 112 are not connected to each other only at the ends close to the first plate 21 and are in an open circuit state, if the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112, the current flows roughly along the bending path of "the open circuit end of the first coupling portion 111 (i.e., the end of the first coupling portion 111 close to the first plate 21), the closed circuit ends of the first coupling portion 111 and the second coupling portion 112 (i.e., the end of the first coupling portion 111 away from the first plate 21 and the end of the second coupling portion 112 away from the first plate 21), and the open circuit end of the second coupling portion 112 (i.e., the end of the second coupling portion 112 close to the first plate 21)". If a flow guide 13 is provided between the first coupling portion 111 and the second coupling portion 112, the flow guide 13 will form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, so that the closed ends of the first coupling portion 111 and the second coupling portion 112 are short-circuited by the flow guide 13, so that the current flows in the open-circuit path formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112, so that the current flows roughly along the curved path of "the open-circuit end of the first coupling portion 111 (i.e., the end of the first coupling portion 111 close to the first plate 21), the flow guide 13, and the open-circuit end of the second coupling portion 112 (i.e., the end of the second coupling portion 112 close to the first plate 21)". Therefore, during the axial movement of the guide member 13 in the slide 113, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 will change accordingly, and the effective coupling area of ​​the coupling member 11 (that is, the open-circuit part formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted. Specifically, if the guide member 13 moves along the open-circuit end away from the first coupling part 111 and the second coupling part 112 (in this case, it moves in the direction away from the first plate 21), the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 gradually increases, and the effective axial height of the coupling member 11 participating in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves along the open-circuit end close to the first coupling part 111 and the second coupling part 112 (in this case, it moves in the direction close to the first plate 21), the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 gradually decreases, and the effective axial height of the coupling member 11 participating in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0062] In the case where both ends of the first coupling portion 111 and the second coupling portion 112 are in an open circuit state and there is no conductive path in the middle of the first coupling portion 111 and the second coupling portion 112, if the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112, the current cannot flow between the first coupling portion 111 and the second coupling portion 112 due to the lack of a conductive path; if the guide member 13 is provided between the first coupling portion 111 and the second coupling portion 112, the guide member 13 will form a current conductive path between the first coupling portion 111 and the second coupling portion 112, so that the first coupling portion 111 and the guide member 13 are 3 and the second coupling portion 112 form two open paths (with the guide member 13 as the dividing line, forming an open path close to the first plate 21 and an open path away from the first plate 21). Since the electric field is mainly concentrated on the first plate 21 and the magnetic field is mainly concentrated on the second plate 22, most of the current flows mainly along the open path away from the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112, and a small part of the current will exist in the open path close to the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112. Therefore, during the axial movement of the flow guide 13 in the slideway 113, the axial position of the flow guide 13 and the current conducting path formed by it will change, so that the length of the open path formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112 away from the first plate 21 will change accordingly, so that the effective coupling area of ​​the coupling member 11 (that is, the open part formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112 away from the first plate 21) will change accordingly, so that the coupling member 11 participates in the coupling. The effective axial height changes accordingly, thereby being able to continuously adjust the amount of capacitive coupling; although during this period, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 close to the first plate 21 also changes accordingly, and will negatively affect the adjustment of the amount of capacitive coupling, but the "change in the length of the open path close to the first plate 21" on the capacitive coupling amount will be less than the "change in the length of the open path away from the first plate 21" on the adjustment amount of the capacitive coupling amount, therefore, linear adjustment of the capacitive coupling amount can still be achieved. Specifically, if the guide member 13 moves in a direction close to the first plate 21, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 away from the first plate 21 will gradually increase, so that the effective axial height of the coupling member 11 participating in the coupling will gradually increase, thereby significantly increasing the capacitive coupling amount and enhancing the capacitive coupling; at the same time, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 close to the first plate 21 will gradually decrease, which will slightly reduce the capacitive coupling amount and weaken the capacitive coupling; the overall adjustment effect of "increasing the capacitive coupling amount and enhancing the capacitive coupling" is still presented.On the contrary, if the guide member 13 moves in the direction away from the first plate 21, the length of the open path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 away from the first plate 21 will gradually decrease, so that the effective axial height of the coupling member 11 participating in the coupling will gradually decrease, thereby significantly reducing the capacitive coupling amount and weakening the capacitive coupling; at the same time, the length of the open path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 close to the first plate 21 will gradually increase, which will slightly increase the capacitive coupling amount and enhance the capacitive coupling; the overall adjustment effect of "reduced capacitive coupling amount and weakened capacitive coupling" is still presented.

[0063] like Figure 8As shown, when both ends of the first coupling portion 111 and the second coupling portion 112 are in an open-circuit state and there is a conductive path in the middle of the first coupling portion 111 and the second coupling portion 112, if the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112, the coupling member 11 will form two open-circuit paths (with the conductive path in the middle of the first coupling portion 111 and the second coupling portion 112 as the dividing line, forming an open-circuit path close to the first plate 21 and an open-circuit path away from the first plate 21). Since the electric field is mainly concentrated on the first plate 21 and the magnetic field is mainly concentrated on the second plate 22, most of the current mainly flows along the open-circuit path formed by the first coupling portion 111 and the second coupling portion 112 away from the first plate 21, and a small part of the current will exist in the open-circuit path formed by the first coupling portion 111 and the second coupling portion 112 close to the first plate 21. If a flow guide 13 is provided between the first coupling portion 111 and the second coupling portion 112, the flow guide 13 will form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, and the flow guide 13 must be located on the side of the "conducting path between the first coupling portion 111 and the second coupling portion 112" away from the first plate 21, so as to short-circuit the "conducting path between the first coupling portion 111 and the second coupling portion 112", so that the current mainly flows along the open path formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112 away from the first plate 21. Therefore, on the basis that the guide member 13 is located on the side away from the first plate 21 of the "conducting path between the first coupling part 111 and the second coupling part 112", during the axial movement of the guide member 13 in the slide 113, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open path away from the first plate 21 formed by the first coupling part 111, the guide member 13 and the second coupling part 112 will change accordingly, so that the effective coupling area of ​​the coupling member 11 (that is, the open part away from the first plate 21 formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted. Specifically, if the guide member 13 moves in a direction close to the first plate 21, the length of the open path away from the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually increases, and the effective axial height of the coupling member 11 involved in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves in a direction away from the first plate 21, the length of the open path away from the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually decreases, and the effective axial height of the coupling member 11 involved in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0064] Among them, when the capacitive coupling component 10 is set between two adjacent resonant rods 30, the capacitive coupling amount is adjusted, that is, the capacitive coupling strength between the two resonant rods 30 is adjusted; when the capacitive coupling component 10 is set between two non-adjacent resonant rods 30, the capacitive coupling amount is adjusted, that is, the passband out-of-band suppression is debugged.

[0065] It should also be noted that the capacitive coupling component 10 also includes a mounting member 12. Figure 3 、 Figure 6 As shown, in some embodiments, the mounting member 12 can be movably mounted on the first plate 21. Figure 5 、 Figure 7 、 Figure 8 As shown, in other embodiments, the mounting member 12 can be movably mounted on the second plate 22. The mounting member 12 can be mounted on either the first plate 21 or the second plate 22, which is compatible with the embodiments that "the first coupling portion 111 and the second coupling portion 112 can be non-conductive with each other and in an open-circuit state only at the ends away from the first plate 21", "the first coupling portion 111 and the second coupling portion 112 can be non-conductive with each other and in an open-circuit state only at the ends close to the first plate 21", and "the first coupling portion 111 and the second coupling portion 112 can be in an open-circuit state at both ends".

[0066] The mounting member 12 is used to install and support the guide member 13 and drive the guide member 13 to move axially in the slideway 113. In some embodiments, the guide member 13 is connected and fixed to the mounting member 12, so that the guide member 13 moves axially and rotates circumferentially synchronously with the mounting member 12. The connection and fixing method between the guide member 13 and the mounting member 12 can be, but is not limited to, bonding, welding, pressing, riveting, clamping, etc. The mounting member 12 is installed through the first plate 21 (or the second plate 22). The mounting member 12 can move axially and rotate circumferentially relative to the first plate 21 (or the second plate 22). For example, the mounting member 12 can be a screw or a round rod with a smooth surface. The mounting member 12 can move axially and rotate circumferentially relative to the first plate 21 (or the second plate 22). After debugging is completed, the mounting member 12 can be fixed relative to the first plate 21 (or the second plate 22) by thread self-locking, clamping, bonding, welding, etc. In other embodiments, the guide member 13 is connected and fixed to the mounting member 12 so that the guide member 13 moves axially synchronously with the mounting member 12. The connection and fixing method between the guide member 13 and the mounting member 12 may be but is not limited to bonding, welding, crimping, riveting, clamping, etc.; the mounting member 12 is installed on the first plate 21 (or the second plate 22), and the mounting member 12 can move axially relative to the first plate 21 (or the second plate 22). The mounting member 12 is circumferentially limited relative to the first plate 21 (or the second plate 22) (that is, it is restricted from circumferential rotation). For example, the mounting member 12 can be a polygonal rod, and the mounting member 12 can move axially relative to the first plate 21 (or the second plate 22) but is restricted from circumferential rotation. After debugging is completed, the mounting member 12 can be fixed relative to the first plate 21 (or the second plate 22) by clamping, bonding, welding, etc. In other embodiments, the guide member 13 is threadedly connected to the mounting member 12, so that the rotation of the mounting member 12 can drive the guide member 13 to move axially along the mounting member 12; the mounting member 12 is installed through the first plate 21 (or the second plate 22), and the mounting member 12 can rotate circumferentially relative to the first plate 21 (or the second plate 22), and the mounting member 12 is axially limited relative to the first plate 21 (or the second plate 22) (that is, it is restricted from axial movement). For example, the mounting member 12 can be rotatably installed on the first plate 21 (or the second plate 22), and can be buckled (for example, hooked, inverted, etc.) with the first plate 21 (or the second plate 22) to limit the axial position relative to the first plate 21 (or the second plate 22).

[0067] Among them, the mounting member 12 can be an insulating member, an insulating member can be set at the connection between the mounting member 12 and the guide member 13, and an insulating member can be set at the connection between the mounting member 12 and the first plate member 21 (or the second plate member 22), so that the coupling member 11 is not grounded to the first plate member 21 (or the second plate member 22) through the guide member 13 and the mounting member 12, so that the coupling member 11 is not grounded to the first plate member 21 (or the second plate member 22).

[0068] The coupling member 11 can be insulated and separated from the second plate 22 (or the first plate 21), or an insulating member can be provided between the coupling member 11 and the second plate 22 (or the first plate 21) so that the coupling member 11 is not grounded to the second plate 22 (or the first plate 21).

[0069] In some embodiments, the cross-sectional shape of the flow guide 13 may be identical to the cross-sectional shape of the slideway 113, so that the flow guide 13 can move axially within the slideway 113 and the outer circumferential surface of the flow guide 13 can fit snugly against the first coupling portion 111 and the second coupling portion 112. Of course, in other embodiments, the cross-sectional shape of the flow guide 13 may be different from the cross-sectional shape of the slideway 113. The cross-sectional shape of the flow guide 13 refers to a cross-sectional shape perpendicular to the axial direction of the flow guide 13, while the cross-sectional shape of the slideway 113 refers to a cross-sectional shape perpendicular to the axial direction of the slideway 113.

[0070] In summary, the capacitive coupling component 10 provided in the embodiment of the present application can achieve capacitive coupling of the two resonant rods 30 by means of a coupling member 11 that is relatively fixed and not grounded between the two resonant rods 30; a flow guide 13 can be installed and supported by means of a mounting member 12 that is movably mounted on the first plate 21 or the second plate 22, and can drive the flow guide 13 to move axially in the slideway 113 of the coupling member 11; a current conduction path can be formed between the first coupling portion 111 and the second coupling portion 112, which are in an open-circuit state at least at one end, by means of the flow guide 13 that is axially movable in the slideway 113 and whose outer peripheral surface abuts the first coupling portion 111 and the second coupling portion 112, so as to promote current flow along the open-circuit path formed by the first coupling portion 111, the flow guide 13, and the second coupling portion 112. Based on this, the capacitive coupling component 10 can achieve capacitive coupling of the two resonant rods 30 with an optimized and reliable structure. In addition, the capacitive coupling component 10 can drive the guide member 13 to move axially in the slide 113 through the mounting member 12 to adjust the axial position of the guide member 13 and the current conduction path, and adjust the length of the open circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112, adjust the effective coupling area of ​​the coupling member 11, and adjust the effective axial height of the coupling member 11 involved in the coupling, so as to achieve continuous adjustment and linear adjustment of the capacitive coupling amount, with low adjustment difficulty, convenient, fast, accurate and controllable adjustment, better adjustability and adjustable flexibility, and a larger adjustable range of the capacitive coupling amount, which is conducive to improving the adjustment convenience, adjustment accuracy and debugging efficiency of the capacitive coupling component 10, and can enable the capacitive coupling component 10 to adapt to different coupling requirements.

[0071] Furthermore, existing capacitive coupling assemblies adjust the capacitive coupling by moving the coupling member (e.g., rotating the coupling member circumferentially to change the coupling member's angle relative to the resonant rod, or moving the coupling member axially to change its axial height). This approach requires a significant amount of physical space to accommodate the movement of the coupling member. However, the capacitive coupling assembly 10 of this embodiment adjusts the capacitive coupling by axially moving the flow guide member 13 within the slideway 113 of the coupling member 11. Because the flow guide member 13 moves within the slideway 113 of the coupling member 11, no additional physical space needs to be reserved for its movement, thereby reducing the space required by the capacitive coupling assembly 10.

[0072] Moreover, with the continuous development of 5G (5th Generation Mobile Communication Technology), filters and wireless communication systems are gradually becoming miniaturized, and it is difficult to achieve capacitive coupling in the small space of a miniaturized filter. However, the capacitive coupling component 10 of this embodiment requires fewer components to be arranged and assembled, and requires less space to be occupied. There is no need to reserve additional physical space for the movement of the guide member 13, which is particularly suitable for the needs of miniaturized filters. Of course, the capacitive coupling component 10 of this embodiment is also suitable for conventional filter products with capacitive coupling requirements, and has a wide range of applicable scenarios.

[0073] Moreover, the capacitive coupling component 10 of the present embodiment can adjust the deviation of the capacitive coupling amount caused by factors such as processing errors by moving the guide member 13 axially, thereby reducing the sensitivity to processing errors, reducing the requirements for processing accuracy and assembly accuracy, reducing the processing difficulty, debugging difficulty, maintenance difficulty, maintenance cost, and production scrap rate, and improving the production yield rate.

[0074] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 11 In some embodiments of the present application, the coupling member 11 includes a connecting portion 114 , which extends along the circumference of the slideway 113 and is connected between the first coupling portion 111 and the second coupling portion 112 .

[0075] It should be noted that this embodiment is compatible with the situation where “the mounting member 12 is movably mounted on the first plate 21 ” and is also compatible with the situation where “the mounting member 12 is movably mounted on the second plate 22 ”.

[0076] It should also be noted that the connection portion 114 is extended along the circumference of the slideway 113 so that the connection portion 114 is arranged to avoid the slideway 113 and does not interfere with the axial movement of the guide member 13 in the slideway 113 .

[0077] The connecting portion 114 is connected between the first coupling portion 111 and the second coupling portion 112, that is, along the circumference of the slideway 113, one end of the connecting portion 114 is connected to the first coupling portion 111, and the other end of the connecting portion 114 is connected to the second coupling portion 112. The connecting portion 114 and the first coupling portion 111 can be connected as a whole or as a separate body. The separate connection method can be, but is not limited to, bonding, welding, welding, fastening with fasteners (such as screws, pins, etc.), snap-fit ​​connection, threaded connection, etc. The connecting portion 114 and the second coupling portion 112 can be connected as a whole or as a separate body. The separate connection method can be, but is not limited to, bonding, welding, welding, fastening with fasteners (such as screws, pins, etc.), snap-fit ​​connection, threaded connection, etc.

[0078] like Figure 4 、 Figure 11 As shown, in some embodiments, two connecting portions 114 are provided, and the first coupling portion 111, the connecting portion 114, the second coupling portion 112, and the other connecting portion 114 are sequentially connected end to end along the circumference of the slideway 113 to form a quasi-annular structure, so that the first coupling portion 111 and the second coupling portion 112 are connected and fixed to each other via the two connecting portions 114. In other embodiments, only one connecting portion 114 may be provided, and the first coupling portion 111 and the second coupling portion 112 are connected and fixed to each other via only one connecting portion 114.

[0079] By adopting the above solution, the coupling member 11 can be connected between the first coupling portion 111 and the second coupling portion 112 via the connecting portion 114, thereby stabilizing the relative position and state between the first coupling portion 111 and the second coupling portion 112, thereby ensuring a stable and reliable spacing relative to each other between the first coupling portion 111 and the second coupling portion 112. This optimizes the structure of the coupling member 11 and improves the structural stability and reliability of the coupling member 11. Furthermore, because the connecting portion 114 extends circumferentially along the slideway 113 without interfering with the axial movement of the flow guide 13 within the slideway 113, the capacitive coupling assembly 10 can still continuously and linearly adjust the capacitive coupling amount by axially moving the flow guide 13 within the slideway 113, thereby maintaining the adjustability and adjustable flexibility of the capacitive coupling assembly 10.

[0080] Of course, in other embodiments, the coupling member 11 may omit the connection portion 114 , and the first coupling portion 111 and the second coupling portion 112 of the coupling member 11 may be relatively fixed via other components (such as the insulating seat 14 ).

[0081] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 11In some embodiments of the present application, the connecting portion 114 is located at ends of both the first coupling portion 111 and the second coupling portion 112 close to the first plate 21 .

[0082] It should be noted that the connecting portion 114 is located at the ends of the first coupling portion 111 and the second coupling portion 112 that are close to the first plate 21, and is connected between the first coupling portion 111 and the second coupling portion 112. In other words, the connecting portion 114 is connected between the ends of the first coupling portion 111 and the second coupling portion 112 that are close to the first plate 21. In other words, along the circumference of the slideway 113, one end of the connecting portion 114 is connected to the end of the first coupling portion 111 that is close to the first plate 21, and the other end of the connecting portion 114 is connected to the end of the second coupling portion 112 that is close to the first plate 21.

[0083] Based on this, the first coupling portion 111 and the second coupling portion 112 can be connected and fixed relative to each other via the connecting portion 114, so that the overall shape of the coupling member 11 is approximately N-shaped. Furthermore, the ends of the first coupling portion 111 and the second coupling portion 112 near the first plate 21 can be connected to each other via the connecting portion 114, forming a closed circuit state. Since at least one end of the first coupling portion 111 and the second coupling portion 112 is in an open circuit state, the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21 are not connected to each other and are in an open circuit state.

[0084] Based on this, Figure 9 As shown, when the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112, the current flows roughly along the N-shaped path of "the end of the first coupling portion 111 away from the first plate 21, the end of the first coupling portion 111 close to the first plate 21, the connecting portion 114, the end of the second coupling portion 112 close to the first plate 21, and the end of the second coupling portion 112 away from the first plate 21". Figure 10As shown, when the guide member 13 is provided between the first coupling portion 111 and the second coupling portion 112, the guide member 13 will form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, so that the connecting portion 114 is short-circuited by the guide member 13, so that the current flows in the open circuit path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112, so that the current flows roughly along the bending path of "the end of the first coupling portion 111 away from the first plate 21, the guide member 13, and the end of the second coupling portion 112 away from the first plate 21", so that the current does not flow in the closed circuit path formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112 and the guide member 13. Therefore, during the axial movement of the guide member 13 in the slide 113, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 will change accordingly, and the effective coupling area of ​​the coupling member 11 (that is, the open-circuit part formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted. Specifically, if the guide member 13 moves in a direction approaching the connecting portion 114, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually increases, and the effective axial height of the coupling member 11 participating in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves in a direction away from the connecting portion 114, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually decreases, and the effective axial height of the coupling member 11 participating in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0085] By adopting the above solution, the capacitive coupling assembly 10 can still continuously and linearly adjust the capacitive coupling amount by axially moving the flow guide 13 within the slideway 113, thereby maintaining the adjustability and adjustable flexibility of the capacitive coupling assembly 10. Furthermore, because the connecting portion 114 is provided on the end side of both the first coupling portion 111 and the second coupling portion 112 that is closer to the first plate 21, the effective axial movement range of the flow guide 13 includes the range from the connecting portion 114 to the end side of the coupling member 11 that is farther from the first plate 21. This allows for a larger adjustable range of the capacitive coupling amount, thereby expanding and optimizing the adjustable range of the capacitive coupling assembly 10.

[0086] Moreover, since the connecting portion 114 is arranged on the end side of the first coupling portion 111 and the second coupling portion 112 close to the first plate 21, and since the electric field is mainly concentrated on the first plate 21 and the magnetic field is mainly concentrated on the second plate 22, the open circuit path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 will be closer to the area with more current distribution because it is away from the first plate 21 and close to the second plate 22, which is more conducive to current flow, thereby having excellent adjustment sensitivity, that is, this embodiment can optimize and improve the adjustment sensitivity of the capacitive coupling component 10.

[0087] Moreover, since the first coupling portion 111, the guide member 13 and the second coupling portion 112 form only one open circuit path, and since there is basically no current in the closed circuit path formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112 and the guide member 13, the coupling adjustment will not be affected. Therefore, compared with other embodiments in which the coupling member 11 and the guide member 13 jointly form two open circuit paths (for example, the embodiment in which "the coupling member 11 is not provided with the connecting portion 114" or "the connecting portion 114 is located in the middle of the first coupling portion 111 and the second coupling portion 112"), the linear adjustment effect of this embodiment is better and is more conducive to the precise control of the linear adjustment.

[0088] Furthermore, since the connecting portion 114 is arranged on the end sides of the first coupling portion 111 and the second coupling portion 112 close to the first plate 21, when the guide member 13 moves to the end sides of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21, the coupling member 11 and the guide member 13 as a whole can be in a "mouth" shape. Therefore, this embodiment can reduce the capacitive coupling amount to a minimum and weaken the capacitive coupling to a minimum.

[0089] See also Figure 6 、 Figure 7 In some embodiments of the present application, the connecting portion 114 is located at ends of the first coupling portion 111 and the second coupling portion 112 that are away from the first plate 21 .

[0090] It should be noted that the connecting portion 114 is located at the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21, and is connected between the first coupling portion 111 and the second coupling portion 112. In other words, the connecting portion 114 is connected between the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21. In other words, along the circumference of the slideway 113, one end of the connecting portion 114 is connected to the end of the first coupling portion 111 away from the first plate 21, and the other end of the connecting portion 114 is connected to the end of the second coupling portion 112 away from the first plate 21.

[0091] Based on this, the first coupling portion 111 and the second coupling portion 112 can be connected and fixed relative to each other via the connecting portion 114, so that the overall shape of the coupling member 11 is U-shaped. Furthermore, the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21 can be connected to each other via the connecting portion 114, forming a closed circuit state. Since at least one end of the first coupling portion 111 and the second coupling portion 112 is in an open circuit state, the ends of the first coupling portion 111 and the second coupling portion 112 near the first plate 21 are not connected to each other and are in an open circuit state.

[0092] Based on this, when no flow guide 13 is provided between the first coupling part 111 and the second coupling part 112, the current flows roughly along the U-shaped path of "the end of the first coupling part 111 close to the first plate 21, the end of the first coupling part 111 away from the first plate 21, the connecting part 114, the end of the second coupling part 112 away from the first plate 21, and the end of the second coupling part 112 close to the first plate 21". When a flow guide 13 is provided between the first coupling portion 111 and the second coupling portion 112, the flow guide 13 will form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, so that the connecting portion 114 is short-circuited by the flow guide 13, so that the current flows in the open path formed by the first coupling portion 111, the flow guide 13 and the second coupling portion 112, so that the current flows roughly along the bending path of "the end of the first coupling portion 111 close to the first plate 21, the flow guide 13, and the end of the second coupling portion 112 close to the first plate 21", so that the current does not flow in the closed path formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112 and the flow guide 13. Therefore, during the axial movement of the guide member 13 in the slide 113, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open-circuit path formed by the first coupling part 111, the guide member 13 and the second coupling part 112 will change accordingly, and the effective coupling area of ​​the coupling member 11 (that is, the open-circuit part formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted. Specifically, if the guide member 13 moves in a direction approaching the connecting portion 114, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually increases, and the effective axial height of the coupling member 11 participating in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves in a direction away from the connecting portion 114, the length of the open path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually decreases, and the effective axial height of the coupling member 11 participating in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0093] By adopting the above solution, the capacitive coupling assembly 10 can still continuously and linearly adjust the capacitive coupling amount by axially moving the flow guide 13 within the slideway 113, thereby maintaining the adjustability and adjustable flexibility of the capacitive coupling assembly 10. Furthermore, because the connecting portion 114 is located on the end of both the first coupling portion 111 and the second coupling portion 112 that is away from the first plate 21, the effective axial movement range of the flow guide 13 includes the range from the connecting portion 114 to the end of the coupling member 11 that is closer to the first plate 21. This can increase the adjustable range of the capacitive coupling amount, thereby expanding and optimizing the adjustable range of the capacitive coupling assembly 10.

[0094] Moreover, since the first coupling portion 111, the guide member 13 and the second coupling portion 112 form only one open circuit path, and since there is basically no current in the closed circuit path formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112 and the guide member 13, there will be no impact on the adjustment of the coupling. Therefore, compared with other embodiments in which the coupling member 11 and the guide member 13 jointly form two open circuit paths (for example, the embodiment in which "the coupling member 11 is not provided with the connecting portion 114" or "the connecting portion 114 is located in the middle of the first coupling portion 111 and the second coupling portion 112"), the linear adjustment effect of this embodiment is better and is more conducive to the precise control of the linear adjustment.

[0095] Furthermore, since the connecting portion 114 is arranged on the end sides of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21, when the guide member 13 moves to the end sides of the first coupling portion 111 and the second coupling portion 112 close to the first plate 21, the coupling member 11 and the guide member 13 as a whole can be in a "mouth" shape. Therefore, this embodiment can reduce the capacitive coupling amount to a minimum and weaken the capacitive coupling to a minimum.

[0096] However, since the connecting portion 114 is arranged on the end side of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21, and since the electric field is mainly concentrated on the first plate 21 and the magnetic field is mainly concentrated on the second plate 22, the open circuit path formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 will have less current distribution due to being close to the first plate 21 and away from the second plate 22. Compared with the previous embodiment, this embodiment is not very conducive to current flow and the adjustment sensitivity is relatively poor.

[0097] See also Figure 8 In some embodiments of the present application, the connecting portion 114 is located in the middle of the first coupling portion 111 and the second coupling portion 112 .

[0098] It should be noted that “the middle portion of the first coupling portion 111 and the second coupling portion 112 ” refers to the middle portion of the first coupling portion 111 and the second coupling portion 112 along the axial direction of the coupling member 11 (ie, the non-end region).

[0099] The connecting portion 114 is connected between the middle portions of the first coupling portion 111 and the second coupling portion 112. That is, along the circumference of the slideway 113, one end of the connecting portion 114 is connected to the middle portion of the first coupling portion 111, and the other end of the connecting portion 114 is connected to the middle portion of the second coupling portion 112. Thus, the first coupling portion 111 and the second coupling portion 112 can be relatively fixed via the connecting portion 114, giving the coupling member 11 an overall H-shaped configuration. In this configuration, both ends of the first coupling portion 111 and the second coupling portion 112 are open.

[0100] Based on this, when the guide member 13 is not provided between the first coupling portion 111 and the second coupling portion 112, the first coupling portion 111, the connecting portion 114 and the second coupling portion 112 will form two open paths (with the connecting portion 114 as the dividing line, forming an open path close to the first plate 21 and an open path away from the first plate 21). Since the electric field is mainly concentrated on the first plate 21 and the magnetic field is mainly concentrated on the second plate 22, most of the current mainly flows along the open path away from the first plate 21 formed by the first coupling portion 111, the connecting portion 114 and the second coupling portion 112, and a small part of the current will exist in the open path close to the first plate 21 formed by the first coupling portion 111, the connecting portion 114 and the second coupling portion 112. In the case where a flow guide 13 is provided between the first coupling portion 111 and the second coupling portion 112, if the flow guide 13 is located on the side of the connecting portion 114 away from the first plate 21, the flow guide 13 can form a current short-circuit path between the first coupling portion 111 and the second coupling portion 112, so that the connecting portion 114 is short-circuited by the flow guide 13, so that most of the current mainly flows in the open-circuit path of "the end of the first coupling portion 111 away from the first plate 21, the flow guide 13, and the end of the second coupling portion 112 away from the first plate 21", so that a small part of the current exists in the open-circuit path close to the first plate 21 formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112, and the flow guide 13, so that the current does not flow in the closed-circuit path formed by the first coupling portion 111, the connecting portion 114, the second coupling portion 112, and the flow guide 13. Therefore, during the process of the guide member 13 moving axially in the slide 113 and on the side of the connecting part 114 away from the first plate 21, the axial position of the guide member 13 and the current short-circuit path formed by it will change, so that the length of the open-circuit path of "the end of the first coupling part 111 away from the first plate 21, the guide member 13, and the end of the second coupling part 112 away from the first plate 21" will change accordingly, so that the effective coupling area of ​​the coupling member 11 (that is, the open-circuit part away from the first plate 21 formed by the first coupling part 111, the guide member 13 and the second coupling part 112) will change accordingly, so that the effective axial height of the coupling member 11 participating in the coupling will change accordingly, so that the capacitive coupling amount can be continuously and linearly adjusted.Specifically, if the guide member 13 moves in a direction close to the connecting portion 114, the length of the open path away from the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually increases, and the effective axial height of the coupling member 11 involved in the coupling gradually increases, then the capacitive coupling amount increases and the capacitive coupling is enhanced; conversely, if the guide member 13 moves in a direction away from the connecting portion 114, the length of the open path away from the first plate 21 formed by the first coupling portion 111, the guide member 13 and the second coupling portion 112 gradually decreases, and the effective axial height of the coupling member 11 involved in the coupling gradually decreases, then the capacitive coupling amount decreases and the capacitive coupling is weakened.

[0101] By adopting the above-mentioned solution, the capacitive coupling component 10 can continuously and linearly adjust the capacitive coupling amount by moving the guide member 13 axially in the slide 113 and on the side of the connection portion 114 away from the first plate 21, thereby maintaining the adjustability and adjustable flexibility of the capacitive coupling component 10.

[0102] However, since the connecting portion 114 is arranged in the middle of the first coupling portion 111 and the second coupling portion 112, the effective axial movement range of the guide member 13 includes the range from the connecting portion 114 to the end side of the coupling member 11 away from the first plate 21. Therefore, compared with the three embodiments of "the connecting portion 114 is located at the end of the first coupling portion 111 and the second coupling portion 112 close to the first plate 21", "the connecting portion 114 is located at the end of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21", and "the coupling member 11 is not provided with the connecting portion 114", the adjustable range of the capacitive coupling amount of this embodiment is relatively small.

[0103] Moreover, since the length of the open path formed by the first coupling portion 111, the connecting portion 114 and the second coupling portion 112 close to the first plate 21 does not change during the axial movement of the guide member 13 in the slide 113 and on the side where the connecting portion 114 moves away from the first plate 21, and will not reversely affect the adjustment of the capacitive coupling amount, the linear adjustment effect of this embodiment is relatively better than that of the embodiment in which the connecting portion 114 is not provided on the coupling member 11, and it will be more conducive to the regulation of the linear adjustment.

[0104] Furthermore, because the connecting portion 114 is located midway between the first coupling portion 111 and the second coupling portion 112, when the flow guide 13 moves to the end where the first coupling portion 111 and the second coupling portion 112 are away from the first plate 21, the coupling member 11 and the flow guide 13 can assume a U-shaped configuration, with a small amount of current still remaining in the open-circuit path near the first plate 21 formed by the first coupling portion 111, the connecting portion 114, and the second coupling portion 112. Therefore, this embodiment can reduce the capacitive coupling to a minimum while retaining a certain margin. Similarly, in the embodiment where the coupling member 11 lacks the connecting portion 114, even when the flow guide 13 moves to the end where the first coupling portion 111 and the second coupling portion 112 are away from the first plate 21, a certain margin of "capacitive coupling" and "coupling strength" will remain due to the U-shaped configuration of the coupling member 11 and the flow guide 13.

[0105] See also Figure 3 、 Figure 4 、 Figure 11 In some embodiments of the present application, the coupling member 11 is a cylindrical structure with a truncation groove 115 extending through the cylindrical wall, and the truncation groove 115 is extended along the axial direction of the coupling member 11.

[0106] It should be noted that the coupling member 11 is a cylindrical structure having a truncation groove 115 extending through the cylindrical wall. The inner space of the cylindrical structure forms a slideway 113. The outer contour of the cylindrical structure and the shape of the slideway 113 can be the same or different. For example, the outer contour of the cylindrical structure and the shape of the slideway 113 can both be cylindrical, so that the cylindrical structure has a cylindrical shape. For another example, the outer contour of the cylindrical structure can be a rectangular parallelepiped, and the shape of the slideway 113 can be cylindrical. For another example, the outer contour of the cylindrical structure can be cylindrical, and the shape of the slideway 113 can be rectangular parallelepiped. For another example, the outer contour of the cylindrical structure can be spherical, and the shape of the slideway 113 can be cylindrical. And so on.

[0107] According to the principle that “at least one end of the first coupling portion 111 and the second coupling portion 112 is in an open circuit state”, the number and positions of the truncation grooves 115 can be set as needed.

[0108] For example, Figure 3 、 Figure 4 、 Figure 5 、 Figure 11As shown, in some embodiments, there are two truncated grooves 115, which are spaced apart along the circumference of the cylindrical structure and both penetrate the cylindrical wall of the cylindrical structure; the truncated grooves 115 extend along the axial direction of the coupling member 11; the truncated grooves 115 are spaced apart at one end close to the first plate 21 and the end face of the coupling member 11 close to the first plate 21, so that the ends of the first coupling portion 111 and the second coupling portion 112 close to the first plate 21 are connected to each other and are in a closed circuit state, so that the end of the coupling member 11 close to the first plate 21 retains an annular structure, which includes the "first coupling portion 111" and the second coupling portion 112 connected end to end in sequence along the circumference of the coupling member 11. The end of the second coupling portion 112 close to the first plate 21 is connected to the connecting portion 114, the end of the second coupling portion 112 close to the first plate 21, and the other connecting portion 114; the other end of the truncation groove 115 is connected to the end face of the coupling member 11 away from the first plate 21, so that the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21 are not conductive to each other and are in an open circuit state; based on this, the two truncation grooves 115 can divide the tubular structure into the first coupling portion 111 and the second coupling portion 112 that are opposite to each other, and the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21 are in an open circuit state.

[0109] For example, Figure 6 、 Figure 7 As shown, in other embodiments, there are two truncation grooves 115, which are spaced apart along the circumference of the cylindrical structure and both penetrate the cylindrical wall of the cylindrical structure; the truncation grooves 115 extend along the axial direction of the coupling member 11; the truncation grooves 115 are spaced apart from one end of the first plate 21 and the end face of the coupling member 11 away from the first plate 21, so that the ends of the first coupling portion 111 and the second coupling portion 112 away from the first plate 21 are connected to each other and are in a closed circuit state, so that the end of the coupling member 11 away from the first plate 21 retains an annular structure, which includes the "first coupling portion 111" and the second coupling portion 112 connected end to end in the circumference of the coupling member 11. The end of the coupling part 111 away from the first plate 21", the connecting part 114, the end of the second coupling part 112 away from the first plate 21, and the other connecting part 114; the other end of the truncation groove 115 is connected to the end face of the coupling part 11 close to the first plate 21, so that the ends of the first coupling part 111 and the second coupling part 112 close to the first plate 21 are not conductive to each other and are in an open circuit state; based on this, the two truncation grooves 115 can divide the tubular structure into the first coupling part 111 and the second coupling part 112 that are opposite to each other, and the ends of the first coupling part 111 and the second coupling part 112 close to the first plate 21 are in an open circuit state.

[0110] For example, Figure 8As shown, in other embodiments, there are four truncation grooves 115, and the four truncation grooves 115 are grouped in pairs; the two truncation grooves 115 of one group are arranged at intervals along the circumference of the cylindrical structure, and both pass through the cylindrical wall of the cylindrical structure, and both extend from the end of the cylindrical structure close to the first plate 21 along the axial direction of the coupling member 11; the two truncation grooves 115 of another group are arranged at intervals along the circumference of the cylindrical structure, and both pass through the cylindrical wall of the cylindrical structure, and both extend from the end of the cylindrical structure away from the first plate 21 along the axial direction of the coupling member 11; the two groups of truncation grooves 115 are arranged at intervals along the axial direction of the coupling member 11; based on this, the four truncation grooves 115 can divide the cylindrical structure into a first coupling portion 111 and a second coupling portion 112 that are opposite to each other, and both ends of the first coupling portion 111 and the second coupling portion 112 are in an open circuit state, and there is a conductive path in the middle of the first coupling portion 111 and the second coupling portion 112.

[0111] For example, in other embodiments, there are two truncation grooves 115, and the two truncation grooves 115 are arranged at intervals along the circumference of the cylindrical structure, and both pass through the cylindrical wall of the cylindrical structure, and both extend along the axial direction of the coupling member 11; the truncation groove 115 passes through the end of the cylindrical structure close to the first plate 21 to the end of the cylindrical structure away from the first plate 21; based on this, the two truncation grooves 115 can divide the cylindrical structure into a first coupling portion 111 and a second coupling portion 112 that are spaced apart from each other, and both ends of the first coupling portion 111 and the second coupling portion 112 are in an open circuit state, and there is no conductive path in the middle of the first coupling portion 111 and the second coupling portion 112.

[0112] like Figure 11 As shown, in some embodiments, the two truncated grooves 115 in a group may be arranged opposite to each other along the radial direction of the cylindrical structure, so that the two truncated grooves 115 can evenly divide the cylindrical structure into a first coupling portion 111 and a second coupling portion 112 that are spaced and opposite to each other. Of course, in other embodiments, the two truncated grooves 115 in a group may not be arranged opposite to each other along the radial direction of the cylindrical structure.

[0113] The truncation groove 115 may be processed by, but is not limited to, milling.

[0114] By adopting the above-mentioned solution, a coupling member 11 with at least one end in an open-circuit state can be formed based on a cylindrical structure by providing a truncation groove 115 through the cylindrical wall of the cylindrical structure. Based on this, the coupling member 11 can form a slideway 113 through the cylindrical space within the cylindrical structure, and can separate the cylindrical structure into a first coupling portion 111 and a second coupling portion 112 spaced apart from each other via the truncation groove 115, and make at least one end of the first coupling portion 111 and the second coupling portion 112 open-circuit state, thereby optimizing the structure of the coupling member 11 and improving the processing convenience, processing efficiency, and processing accuracy of the coupling member 11. Moreover, when the truncation groove 115 is not provided along the axial direction of the coupling member 11, a portion of the coupling member 11 can retain an annular structure, directly and reliably stabilizing the relative position and relative state between the first coupling portion 111 and the second coupling portion 112, thereby optimizing the structure of the coupling member 11 and improving the structural strength, structural stability, and structural reliability of the coupling member 11. Moreover, compared to bending the coupling piece into shape, the present embodiment forms the coupling member 11 of the desired shape (e.g., "n"-shaped, "U"-shaped, "H"-shaped, "II"-shaped) by processing the truncation groove 115 on the wall of the cylindrical structure. This can effectively reduce the processing error caused by bending, improve the processing accuracy, and thus improve the accuracy, consistency, and reliability of the coupling member 11. It can also basically avoid the problem that the slideway 113 is difficult to ensure dimensional consistency and accuracy due to bending, thereby causing the guide member 13 to slide unsmoothly.

[0115] Of course, in other embodiments, the coupling member 11 can be formed by bending a coupling sheet.

[0116] See also Figure 3 、 Figure 4 、 Figure 12 In some embodiments of the present application, the capacitive coupling component 10 includes an insulating seat 14, which is arranged between the end side of the coupling member 11 and the corresponding plate of the filter housing 20, and is fixed relative to the filter housing 20. The insulating seat 14 is provided with a limiting groove 141, and the coupling member 11 is interference-fitted into the limiting groove 141.

[0117] It should be noted that the insulating seat 14 is made of an insulating material and has insulating properties. The insulating seat 14 is fixed relative to the corresponding plate of the filter housing 20 to stabilize the position and state of the insulating seat 14 relative to the filter housing 20. Specifically, if the insulating seat 14 is located on the end of the coupling member 11 close to the first plate 21, the insulating seat 14 is fixed relative to the first plate 21; if the insulating seat 14 is located on the end of the coupling member 11 close to the second plate 22, the insulating seat 14 is fixed relative to the second plate 22. Among them, the insulating seat 14 can be made to abut between the first plate 21 and the second plate 22, the insulating seat 14 can be made to limit and engage with the isolation wall of the filter housing 20 located on the side of the insulating seat 14, and the insulating seat 14 can be connected and fixed to the corresponding plate of the filter housing 20 (the connection and fixing method can be but is not limited to bonding, welding, melting, fastening with fasteners (such as screws, pins, etc.), snap connection, threaded connection, etc.), so as to fix the insulating seat 14 relative to the corresponding plate of the filter housing 20.

[0118] The insulating seat 14 is supported between the axial end of the coupling member 11 and the corresponding plate of the filter housing 20, so that the insulating seat 14 can be insulated and blocked between the coupling member 11 and the corresponding plate of the filter housing 20, thereby preventing the coupling member 11 from being grounded to the corresponding plate of the filter housing 20. Specifically, if the insulating seat 14 is provided on the end of the coupling member 11 close to the first plate 21, the insulating seat 14 is insulated and blocked between the coupling member 11 and the first plate 21, preventing the coupling member 11 from being grounded to the first plate 21; conversely, if the insulating seat 14 is provided on the end of the coupling member 11 close to the second plate 22, the insulating seat 14 is insulated and blocked between the coupling member 11 and the second plate 22, preventing the coupling member 11 from being grounded to the second plate 22.

[0119] The insulating seat 14 is provided with a retaining groove 141. The end of the coupling member 11, which is closest to the insulating seat 14, is inserted into the retaining groove 141 and forms an interference fit with the retaining groove 141. Based on this, the insulating seat 14 can position the planar and axial positions of the coupling member 11 based on the retaining fit between the retaining groove 141 and the coupling member 11. The insulating seat 14 can also stabilize the planar position, axial position, and overall state of the coupling member 11 based on the interference fit friction between the retaining groove 141 and the coupling member 11, thereby reducing the risk of coupling and coupling adjustment being affected by changes in the position and state of the coupling member 11.

[0120] In some embodiments, the shape of the limiting groove 141 may correspond to the outer contour of the end of the coupling member 11 near the insulating seat 14, so that the end of the coupling member 11 near the insulating seat 14 can be entirely positioned and inserted in the limiting groove 141. In other embodiments, if the end of the coupling member 11 near the insulating seat 14 is in an open state, the limiting groove 141 may include two limiting sub-grooves, so that the first coupling portion 111 and the second coupling portion 112 can be positioned and inserted in the two limiting sub-grooves in a one-to-one manner.

[0121] The insulating seat 14 and the mounting member 12 may be arranged on the same side. For example, the insulating seat 14 is arranged on the end side of the coupling member 11 close to the first plate 21, and the mounting member 12 is movably mounted on the first plate 21. For another example, the insulating seat 14 is arranged on the end side of the coupling member 11 close to the second plate 22, and the mounting member 12 is movably mounted on the second plate 22. Figure 5 、 Figure 7 、 Figure 8 As shown, when the insulating seat 14 and the mounting member 12 are arranged on the same side, the insulating seat 14 is provided with an avoidance hole 143 for the mounting member 12 to pass through as needed.

[0122] The insulating seat 14 and the mounting member 12 may also be arranged on different sides. For example, the insulating seat 14 is arranged on the end side of the coupling member 11 close to the first plate 21, and the mounting member 12 is movably mounted on the second plate 22. For another example, the insulating seat 14 is arranged on the end side of the coupling member 11 close to the second plate 22, and the mounting member 12 is movably mounted on the first plate 21. Figure 3 、 Figure 6 As shown, when the insulating seat 14 and the mounting member 12 are arranged on different sides, the insulating seat 14 can omit the avoidance hole 143 for the mounting member 12 to pass through.

[0123] By adopting the above-mentioned scheme, the insulating seat 14 can be supported between the end side of the coupling member 11 and the corresponding plate of the filter housing 20, so that the insulating seat 14 can be insulated and blocked between the coupling member 11 and the corresponding plate of the filter housing 20, so that the coupling member 11 is not grounded to the corresponding plate of the filter housing 20, thereby facilitating the ungrounding setting of the coupling member 11, and enabling the capacitive coupling component 10 to reliably promote the two resonant rods 30 to achieve capacitive coupling rather than inductive coupling through the coupling member 11, thereby maintaining the coupling polarity of the capacitive coupling component 10, and maintaining and optimizing the filtering performance and frequency selection characteristics of the filter.

[0124] By adopting the above solution, the insulating seat 14 can be fixed relative to the corresponding plate of the filter housing 20 to stabilize the position and state of the insulating seat 14 relative to the filter housing 20. On this basis, the limiting groove 141 of the insulating seat 14 can also be limited and interfered with the coupling member 11 to position the planar position and axial position of the coupling member 11, and the planar position, axial position, and overall state of the coupling member 11 can be stabilized. Based on this, the insulating seat 14 can be used to achieve multi-directional limiting and positioning of the coupling member 11, and the relative fixation of the coupling member 11 can be conveniently and reliably achieved. The stability and reliability of the installation position and installation state of the coupling member 11 can be improved, and the installation position and installation state of the coupling member 11 between the two resonant rods 30 can be maintained at the designed value. The deviation of the capacitive coupling amount caused by the movement of the coupling member 11 can be reduced, and the risk of affecting the coupling and coupling adjustment due to changes in the position and state of the coupling member 11 can be reduced. The coupling stability and coupling reliability between the coupling member 11 and the two resonant rods 30 can be improved.

[0125] Of course, in other embodiments, the coupling member 11 can be relatively fixed in other ways. For example, the coupling member 11 can be fixed to the second plate 22 or the first plate 21 by bonding with insulating glue. For example, the coupling member 11 can be fixed to the insulating seat 14 by bonding with insulating glue so that the insulating seat 14 can omit the limiting groove 141, and so on.

[0126] See also Figure 3 、 Figure 4 、 Figure 12 In some embodiments of the present application, the insulating seat 14 is provided with a locking protrusion 142, which is engaged in the gap between the first coupling portion 111 and the second coupling portion 112 to limit the circumferential rotation of the coupling member 11.

[0127] It should be noted that the insulating seat 14 is provided with a locking protrusion 142. If the ends of the first coupling portion 111 and the second coupling portion 112 near the insulating seat 14 are in an open circuit state, the locking protrusion 142 can be located on the end side of the coupling member 11 near the insulating seat 14 (for example, the locking protrusion 142 can be protruded from the bottom of the limiting groove 141), or it can be located on the peripheral side of the coupling member 11 (for example, the locking protrusion 142 can be protruded from the groove wall of the limiting groove 141). If the ends of the first coupling portion 111 and the second coupling portion 112 near the insulating seat 14 are in a closed circuit state, the locking protrusion 142 can be located on the peripheral side of the coupling member 11 (for example, the locking protrusion 142 can be protruded from the groove wall of the limiting groove 141). The locking protrusion 142 can be locked into and embedded in the gap between the first coupling portion 111 and the second coupling portion 112 (ie, the truncation groove 115 ) to restrict the circumferential rotation of the coupling member 11 and thereby limit the circumferential position of the coupling member 11 relative to the insulating seat 14 .

[0128] like Figure 3As shown, in some embodiments, the retaining protrusion 142 may be partially located in the slideway 113. In this case, the retaining protrusion 142 may form a positioning barrier to the axial movement of the flow guide 13 in the slideway 113, thereby reducing the effective axial length of the slideway 113. In other embodiments, the retaining protrusion 142 may be disposed away from the slideway 113, so as not to occupy the internal space of the slideway 113 and thus not to affect the axial movement of the flow guide 13 in the slideway 113.

[0129] By adopting the above scheme, the insulating seat 14 can be locked and embedded in the gap between the first coupling part 111 and the second coupling part 112 through the locking protrusion 142, so as to directly and reliably prevent the coupling part 11 from circumferentially rotating around its own central axis, and basically eliminate the risk of deflection of the coupling part 11 caused by axial movement of the guide part 13 or external vibration, thereby optimizing the constraint effect of the insulating seat 14 on the freedom of the coupling part 11, improving the stability of the installation position and installation state of the coupling part 11, and prompting the coupling part 11 to accurately and permanently maintain the preset installation position and installation state between the two resonant rods 30, reducing the capacitive coupling deviation caused by the circumferential rotation of the coupling part 11, and improving the coupling stability and coupling reliability of the coupling part 11 between the two resonant rods 30. In addition, the fit between the locking protrusion 142 and the gap between the first coupling part 111 and the second coupling part 112 can form a physical assembly reference, which can enable the coupling part 11 to be quickly and accurately aligned when inserted into the insulating seat 14 without the need for manual angle calibration, thereby reducing the risk of misaligned installation, thereby reducing the difficulty of assembly between the coupling part 11 and the insulating seat 14, improving the assembly convenience, assembly accuracy and assembly reliability between the coupling part 11 and the insulating seat 14, and improving the production yield of the capacitive coupling component 10.

[0130] Of course, in other embodiments, the insulating seat 14 may omit the locking protrusion 142 and limit the circumferential rotation of the coupling member 11 through other means; for example, when the first coupling portion 111 and the second coupling portion 112 are one-to-one limitedly inserted in the two limiting sub-grooves of the limiting groove 141, since the two limiting sub-grooves can limit the circumferential rotation of the coupling member 11, the insulating seat 14 may omit the locking protrusion 142; for another example, when the coupling member 11 is fixed to the insulating seat 14 by means of insulating glue, since the insulating glue can limit the circumferential rotation of the coupling member 11, the insulating seat 14 may omit the locking protrusion 142; and so on.

[0131] See also Figure 3 、 Figure 4 、 Figure 12 In some embodiments of the present application, the capacitive coupling assembly 10 includes a dielectric cylinder 15 , and the coupling member 11 and the flow guide member 13 are both disposed inside the dielectric cylinder 15 .

[0132] It should be noted that the dielectric cylinder 15 can be made of a material with a high dielectric constant, for example, the dielectric cylinder 15 can be a ceramic dielectric member, a nylon plastic member, a silicone member, etc. The dielectric constant of the dielectric cylinder 15 is greater than the dielectric constant of air.

[0133] The dielectric cylinder 15 is vertically disposed between the first plate 21 and the second plate 22. Specifically, the dielectric cylinder 15 is disposed upright between the first plate 21 and the second plate 22, with the axial direction of the dielectric cylinder 15 being substantially perpendicular to the first plate 21 and the second plate 22. The dielectric cylinder 15 can be positionally connected to the filter housing 20 (e.g., at least one of the first plate 21 and the second plate 22, or a partition wall located around the dielectric cylinder 15, etc.) to stabilize its installation position and state. The dielectric cylinder 15 can be connected to the filter housing 20 in a removable or fixed manner.

[0134] The dielectric cylinder 15 is cylindrical, and the coupling member 11 is disposed within the cylinder of the dielectric cylinder 15. Correspondingly, the flow guide member 13, which moves axially in the slideway 113 of the coupling member 11, is also disposed within the cylinder of the dielectric cylinder 15. The outer contour of the dielectric cylinder 15 and the shape of the inner space of the cylinder can be the same or different. In the case where the inner cylinder wall of the dielectric cylinder 15 needs to form a circumferential limiting effect on the outer circumferential surface of the coupling member 11, the shape of the inner space of the dielectric cylinder 15 and the outer contour of the coupling member 11 can be the same; in the case where the inner cylinder wall of the dielectric cylinder 15 does not need to form a circumferential limiting effect on the outer circumferential surface of the coupling member 11, the shape of the inner space of the dielectric cylinder 15 and the outer contour of the coupling member 11 can be the same or different. For example, the outer contour of the medium cylinder 15 may be a rectangular parallelepiped, and the shape of the space inside the cylinder may be cylindrical; for another example, the outer contour of the medium cylinder 15 and the shape of the space inside the cylinder may both be cylindrical, so that the medium cylinder 15 is cylindrical; for another example, the outer contour of the medium cylinder 15 may be cylindrical, and the shape of the space inside the cylinder may be a rectangular parallelepiped; and so on.

[0135] Based on this, according to the capacitance formula C=Sε / (4πdk) (where C represents capacitance, S represents relative coupling area, ε represents the effective dielectric constant of the medium, d represents relative distance, and k is a constant), by increasing the effective dielectric constant between the coupling member 11 and the resonant rod 30 through the dielectric cylinder 15, the capacitive coupling can be greatly enhanced, thereby enhancing the capacitive coupling strength and capacitive coupling amount achieved by the capacitive coupling component 10.

[0136] According to the formula E=Q / (4πεr 2)(wherein, E represents the electric field strength, Q represents the charge, ε represents the effective dielectric constant of the medium, and r represents the distance between the two charges). Since the dielectric cylinder 15 increases the effective dielectric constant between the coupling member 11 and the resonant rod 30, the electric field strength can be effectively reduced, thereby reducing the risk of electric field breakdown and sparking due to excessive electric field strength.

[0137] By adopting the above scheme, the effective dielectric constant between the coupling member 11 and the resonant rod 30 can be increased by the dielectric cylinder 15 sleeved on the outer periphery of the coupling member 11, thereby greatly enhancing the capacitive coupling, thereby enhancing the capacitive coupling strength and capacitive coupling amount achieved by the capacitive coupling component 10, increasing the adjustable amount, and expanding the adjustable range of the capacitive coupling amount.

[0138] Furthermore, existing technologies may cause electric field breakdown and sparking due to the close distance between the coupling element and the resonant rod. However, the capacitive coupling assembly 10 of this embodiment increases the effective dielectric constant between the coupling element 11 and the resonant rod 30 via the dielectric cylinder 15, effectively reducing the electric field strength. This reduces the risk of electric field breakdown and sparking due to excessive electric field strength, thereby improving the reliability and service life of the capacitive coupling assembly 10 and the filter.

[0139] Furthermore, the capacitive coupling component 10 of this embodiment occupies a smaller space and requires fewer components to be arranged and assembled, making it particularly suitable for the needs of miniaturized filters. Furthermore, under the limitation of a small space, the capacitive coupling component 10 of this embodiment can also enhance the capacitive coupling strength and the capacitive coupling amount while ensuring a safe distance, thereby solving the problem of difficulty in achieving strong capacitive coupling in a small space.

[0140] See also Figure 3 、 Figure 4 、 Figure 12 In some embodiments of the present application, when the capacitive coupling component 10 includes a dielectric cylinder 15 and an insulating seat 14 , the insulating seat 14 and the dielectric cylinder 15 are an integrated structure.

[0141] By adopting the above solution, by integrating the insulating seat 14 and the dielectric cylinder 15 into an integrated structure, it is possible to facilitate simultaneous processing and forming of the insulating seat 14 and the dielectric cylinder 15, thereby forming an integrated structure that combines the functions of both the insulating seat 14 and the dielectric cylinder 15. This allows for a seamless connection between the insulating seat 14 and the dielectric cylinder 15, eliminates assembly gaps between the insulating seat 14 and the dielectric cylinder 15, and reduces the risk of mechanical loosening, thereby improving processing convenience, processing efficiency, processing precision, structural strength, structural stability, and structural reliability. Furthermore, by combining the insulating seat 14 and the dielectric cylinder 15 into one, the number of components of the capacitive coupling assembly 10 can be reduced, thereby simplifying and optimizing the structure of the capacitive coupling assembly 10, and facilitating the simplification, lightweighting, and integration of the capacitive coupling assembly 10 and the filter. Furthermore, some positioning and assembly processes for the insulating seat 14 and the dielectric cylinder 15 can be simplified, thereby improving the assembly convenience and efficiency of the capacitive coupling assembly 10 and increasing the production yield of the capacitive coupling assembly 10.

[0142] like Figure 3 、 Figure 4 、 Figure 12 As shown, in some embodiments, based on the present embodiment, the shape of the inner space of the dielectric cylinder 15 can be made the same as the outer contour of the coupling 11, so as to form a limiting groove 141 through the inner space of the dielectric cylinder 15, and a comprehensive and reliable circumferential limiting effect can be formed on the outer peripheral surface of the coupling 11 through the inner cylinder wall of the dielectric cylinder 15, thereby optimizing the fixing effect of the coupling 11, improving the stability of the installation position and installation state of the coupling 11, and enabling the coupling 11 to accurately and permanently maintain the preset installation position and installation state between the two resonant rods 30, reducing the capacitive coupling deviation caused by the movement of the coupling 11, and improving the coupling stability and coupling reliability between the coupling 11 and the two resonant rods 30.

[0143] Of course, in other embodiments, the insulating seat 14 and the dielectric cylinder 15 may be two separate components.

[0144] See also Figure 3 In some embodiments of the present application, opposite ends of the medium cylinder 15 abut against the first plate 21 and the second plate 22 respectively.

[0145] It should be noted that, along the axial direction of the medium cylinder 15, one end of the medium cylinder 15 abuts against the first plate 21, and the other end of the medium cylinder 15 abuts against the second plate 22. The medium cylinder 15 can be interference fit or transition fit between the first plate 21 and the second plate 22.

[0146] By adopting the above-mentioned scheme, by making the opposite ends of the medium cylinder 15 abut against the first plate 21 and the second plate 22 respectively, the medium cylinder 15 can be limitedly installed between the first plate 21 and the second plate 22, and the medium cylinder 15 is restricted from moving along the axial direction of the medium cylinder 15, so that the installation position and installation state of the medium cylinder 15 between the first plate 21 and the second plate 22 can be stabilized conveniently, quickly and reliably.

[0147] This embodiment is particularly suitable for use in conjunction with the embodiment in which "the insulating seat 14 and the dielectric cylinder 15 are an integrated structure." This arrangement, based on the combination of "the opposing ends of the dielectric cylinder 15 abutting the first plate 21 and the second plate 22" and "the insulating seat 14 and the dielectric cylinder 15 being an integrated structure," allows the insulating seat 14 to be stabilized relative to the filter housing 20 by abutting between the first plate 21 and the second plate 22. This facilitates convenient, quick, and reliable stabilization of the insulating seat 14, facilitating enhanced and optimized support for the coupling member 11 and ensuring stable installation.

[0148] In some embodiments, on the basis that the opposite ends of the medium cylinder 15 are respectively abutted against the first plate 21 and the second plate 22, the medium cylinder 15 can be connected and fixed to the first plate 21 or the second plate 22, and the connection and fixing method can be but is not limited to bonding, welding, crimping, plugging, clamping, threaded connection, etc.

[0149] Of course, in other embodiments, the dielectric cylinder 15 can be connected to the filter housing 20 (for example, at least one of the first plate 21 and the second plate 22, or for example, a partition wall located on the side of the dielectric cylinder 15, etc.) in a limiting manner to stabilize its own installation position and installation state; wherein, the dielectric cylinder 15 can adopt a detachable connection method or a fixed connection method to achieve a limiting connection with the filter housing 20.

[0150] See also Figure 3 、 Figure 4 In some embodiments of the present application, the guide member 13 is fixedly connected to the mounting member 12 so that the guide member 13 moves axially synchronously with the mounting member 12 .

[0151] It should be noted that the flow guide 13 is connected and fixed to the mounting member 12 so that the flow guide 13 moves axially synchronously with the mounting member 12, or the flow guide 13 moves axially and rotates circumferentially synchronously with the mounting member 12. The connection and fixing method between the flow guide 13 and the mounting member 12 may be, but is not limited to, bonding, welding, crimping, plugging, or clamping.

[0152] By adopting the above-mentioned scheme, by rigidly connecting and fixing the guide member 13 and the mounting member 12, the synchronous axial movement of the two is achieved, which can promote the movement consistency of the guide member 13 and the mounting member 12, and can facilitate the direct determination, adjustment and control of the movement state of the guide member 13 according to the movement state of the mounting member 12, and can reduce the discrepancy between the actual displacement of the guide member 13 and the adjustment amount due to looseness or backlash, thereby reducing the uncertainty in the adjustment process, and can facilitate the precise adjustment of the axial position of the guide member 13, and can facilitate the precise adjustment of the capacitive coupling amount, and can improve the adjustment convenience, adjustment accuracy and debugging efficiency of the capacitive coupling component 10.

[0153] Of course, in other embodiments, the flow guide member 13 may be threadedly connected to the mounting member 12 , so that the rotation of the mounting member 12 can drive the flow guide member 13 to move axially along the mounting member 12 .

[0154] See also Figure 3 、 Figure 4 In some embodiments of the present application, the cross-sectional shape of the slideway 113 and the cross-sectional shape of the guide member 13 are both circular, and the guide member 13 rotates circumferentially and moves axially synchronously with the mounting member 12.

[0155] It should be noted that the cross-sectional shapes of the slideway 113 and the guide member 13 are both circular, allowing the guide member 13 to rotate circumferentially and move axially within the slideway 113. The guide member 13 is fixedly connected to the mounting member 12 so that the guide member 13 rotates circumferentially and moves axially synchronously with the mounting member 12.

[0156] During the circumferential rotation of the flow guide 13, the contact points between the outer circumferential surface of the flow guide 13 and the first coupling portion 111, and the contact points between the outer circumferential surface of the flow guide 13 and the second coupling portion 112 are continuously updated and dynamically adjusted. However, the outer circumferential surface of the flow guide 13 remains in contact with the first coupling portion 111 and the second coupling portion 112, and the flow guide 13 continuously forms a current conduction path between the first coupling portion 111 and the second coupling portion 112. Furthermore, the circumferential rotation of the flow guide 13 does not cause a change in the capacitive coupling amount; the capacitive coupling amount is still primarily adjusted linearly through the axial movement of the flow guide 13.

[0157] During the axial movement of the guide member 13, the axial position of the guide member 13 and the current conduction path formed by it will change, causing the effective coupling area of ​​the coupling member 11 to change accordingly, and causing the effective axial height of the coupling member 11 participating in the coupling to change accordingly, thereby continuously and linearly adjusting the capacitive coupling amount.

[0158] Therefore, during the combined motion process of the flow guide member 13 rotating circumferentially and moving axially along with the mounting member 12 , the capacitive coupling amount is still adjusted linearly.

[0159] By adopting the above scheme, by making the guide member 13 rotate circumferentially and move axially with the mounting member 12, on the one hand, the contact area between the guide member 13 and the first coupling part 111, and between the guide member 13 and the second coupling part 112 can be dynamically adjusted through the circumferential rotation of the guide member 13, so as to disperse and homogenize the mechanical stress, reduce the risk of wear of the local area of ​​the guide member 13 due to long-term contact and long-term friction, and reduce the risk of poor contact between the local area of ​​the guide member 13 and the first coupling part 111 or the second coupling part 112 due to wear, thereby maintaining and improving the abutment reliability and abutment tightness between the guide member 13 and the first coupling part 111, and between the guide member 13 and the second coupling part 112, maintaining and improving the stability and reliability of the current conduction path formed by the guide member 13, and improving the reliability and service life of the guide member 13 and the capacitive coupling component 10. On the other hand, the continuous and linear adjustment of the capacitive coupling amount is still mainly achieved through the axial movement of the guide member 13, thereby maintaining the pure linear characteristics of the adjustment and improving the adjustable flexibility, adjustment convenience, adjustment accuracy and debugging efficiency of the capacitive coupling component 10.

[0160] Of course, in other embodiments, the guide member 13 may only move axially along with the mounting member 12 .

[0161] See also Figure 1 、 Figure 3 、 Figure 4 In some embodiments of the present application, the mounting member 12 is a screw, the capacitive coupling assembly 10 includes a nut 16, and the end of the mounting member 12 away from the guide member 13 is passed through the corresponding plate (i.e., the first plate 21 or the second plate 22) of the filter housing 20 and is threadedly connected to the nut 16.

[0162] It should be noted that the mounting member 12 is a screw, and the outer surface of the mounting member 12 has an external thread. The nut 16 has an internal thread. The end of the mounting member 12 away from the guide member 13 is inserted into the first plate 21 (or the second plate 22), and the end of the mounting member 12 away from the guide member 13 is threadedly connected to the nut 16. The nut 16 can be provided on the outside of the first plate 21 (or the second plate 22), or embedded in the first plate 21 (or the second plate 22). The nut 16 can be an insulating member with insulating properties (for example, a plastic nut, etc.); or, under the premise that the guide member 13 is not grounded to the first plate 21 (or the second plate 22) (for example, when the mounting member 12 is an insulating member), the nut 16 can be a conductive member (for example, a metal nut, etc.).

[0163] By adopting the above-described solution, based on the threaded connection between the mounting member 12 and the nut 16, the mounting member 12 can be rotated circumferentially relative to the nut 16 and axially moved, thereby driving the flow guide 13 to rotate circumferentially and move axially with the mounting member 12, thereby achieving continuous and linear adjustment of the capacitive coupling amount. This also facilitates repeated and precise adjustment of the capacitive coupling amount, thereby improving the adjustable flexibility, adjustment convenience, adjustment accuracy, and debugging efficiency of the capacitive coupling assembly 10. Furthermore, after debugging is completed, in the absence of external force driving the mounting member 12 to rotate circumferentially relative to the nut 16, the mounting member 12 can be self-locked with the nut 16 thread, thereby stabilizing the installation position and installation state relative to the corresponding plate member (i.e., the first plate member 21 or the second plate member 22) of the filter housing 20. This stabilizes the position and state of the flow guide 13, stabilizes the adjusted capacitive coupling amount, and improves the reliability of the capacitive coupling assembly 10.

[0164] Of course, in other embodiments, the nut 16 may be omitted, and the end of the mounting member 12 away from the flow guide member 13 may be directly threadedly connected to the threaded hole of the first plate 21 (or the second plate 22 ).

[0165] See also Figure 3 、 Figure 4 In some embodiments of the present application, the mounting member 12 is an insulating member.

[0166] It should be noted that the mounting member 12 is an insulating member made of an insulating material and has insulating properties. For example, the mounting member 12 can be an insulating non-metallic member, such as a plastic screw.

[0167] By adopting the above-mentioned scheme, by making the mounting member 12 an insulating member, it can be directly insulated and connected between the guide member 13 and the first plate member 21 (or the second plate member 22) through the mounting member 12 to block the grounding path between the coupling member 11, the guide member 13, the mounting member 12, and the first plate member 21 (or the second plate member 22), so that the coupling member 11 is not grounded to the first plate member 21 (or the second plate member 22), thereby facilitating the ungrounded setting of the coupling member 11, and enabling the capacitive coupling component 10 to reliably and stably promote the two resonant rods 30 to achieve capacitive coupling rather than inductive coupling through the coupling member 11, thereby maintaining the coupling polarity of the capacitive coupling component 10, and maintaining and optimizing the filtering performance and frequency selection characteristics of the filter. Moreover, based on the arrangement of this embodiment, there is no need to add additional insulating parts at the connection between the mounting member 12 and the guide member 13, and at the connection between the mounting member 12 and the first plate member 21 (or the second plate member 22), thereby reducing the number of parts of the capacitive coupling component 10, simplifying and optimizing the structure of the capacitive coupling component 10, and facilitating the simplification, lightweighting and integration of the capacitive coupling component 10 and the filter; simplifying the assembly process of the capacitive coupling component 10, and improving the assembly convenience and efficiency of the capacitive coupling component 10.

[0168] Of course, in other embodiments, an insulating member may be provided at the connection between the mounting member 12 and the flow guide member 13, or at the connection between the mounting member 12 and the first plate member 21 (or the second plate member 22), so that the coupling member 11 is not grounded to the first plate member 21 (or the second plate member 22). In this case, the mounting member 12 may be a conductive member (e.g., a metal member, etc.).

[0169] See also Figure 1 、 Figure 3 、 Figure 4 Some embodiments of the present application provide a filter, including a filter housing 20, a plurality of resonant rods 30, and at least one capacitive coupling component 10 provided in an embodiment of the present application, wherein the capacitive coupling component 10 and the resonant rod 30 are both arranged in the filter housing 20.

[0170] It should be noted that the capacitive coupling component 10 can be applied to filter products.

[0171] The filter includes a filter housing 20. The interior of the filter housing 20 has a closed inner cavity, which can achieve a shielding function and prevent signal leakage. The plate on one side of the filter housing 20 is a first plate 21, and the plate on the side of the filter housing 20 opposite to the first plate 21 is a second plate 22. In actual application scenarios, the filter can be placed with the first plate 21 facing upward, or with the first plate 21 facing left, right, front or back. In addition, the shape, size, material, etc. of the filter housing 20 can be flexibly set as needed.

[0172] The filter also includes a plurality of resonant rods 30 disposed within the filter housing 20. The plurality of resonant rods 30 are arranged as required and establish the desired coupling relationship. The resonant rods 30 are connected to the second plate 22 and spaced apart from the first plate 21. That is, one end of the resonant rod 30 can be connected and fixed to the second plate 22 directly or via other components to be fixed relative to the filter housing 20. The end of the resonant rod 30 away from the second plate 22 is spaced apart from the first plate 21, forming a flat plate capacitor therebetween. As a result, the electric field is primarily concentrated near the first plate 21 (i.e., the first plate 21 is the plate near the location where the electric field is concentrated), and the magnetic field is primarily concentrated near the second plate 22. The resonant rods 30 can be directly connected and fixed to the second plate 22 by, but not limited to, integral connection, welding, riveting, crimping, plugging, screw fastening, threaded connection, or snap-fitting, or can be indirectly connected and fixed to the second plate 22 via other structures connected thereto (e.g., a base 40, a mounting post, a coupling rib 50, or other structures). Among them, the resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod or a dielectric resonant rod of other materials; the resonant rod 30 can be a hollow resonant rod or a solid resonant rod; the resonant rod 30 can be with a resonant disk or without a resonant disk; the resonant disk can be with a flange or without a flange; the resonant rod 30 can be a round rod, a polygonal rod, a special-shaped rod, a sheet resonant rod, a sheet metal resonant rod or other forms of resonant rod, etc.

[0173] The filter further includes a capacitive coupling component 10, which can be any of the capacitive coupling components 10 described above. The capacitive coupling component 10 can be disposed between any two resonant rods 30 to achieve capacitive coupling between the two resonant rods 30.

[0174] By adopting the above-mentioned scheme, the filter can construct a capacitive coupling relationship and adjust and optimize the capacitive coupling effect by applying the capacitive coupling component 10 provided in the embodiment of the present application, thereby maintaining and optimizing the filtering performance and frequency selection characteristics of the filter, improving the reliability, consistency, quality and yield of the filter, and reducing the defective rate and debugging cost of the filter.

[0175] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A capacitive coupling assembly, disposed in a filter housing and between two resonant rods, wherein the filter housing has a first plate and a second plate disposed opposite to each other, and the resonant rod is connected to the second plate, characterized in that: The capacitive coupling component includes: a coupling member fixedly disposed relatively between the two resonant rods and not grounded, the coupling member comprising a first coupling portion and a second coupling portion spaced apart and disposed opposite to each other, the coupling member having a slideway disposed between the first coupling portion and the second coupling portion, the slideway being disposed through the coupling member along an axial direction, and at least one end of the first coupling portion and the second coupling portion being in an open circuit state; a mounting member, movably mounted on the first plate member or the second plate member; The flow guide is connected to the mounting member and can be axially moved in the slideway under the drive of the mounting member. The outer peripheral surface of the flow guide abuts against the first coupling portion and the second coupling portion.

2. The capacitive coupling component according to claim 1, wherein: The coupling member includes a connecting portion, which is extended along the circumference of the slideway and connected between the first coupling portion and the second coupling portion; The connecting portion is located at the ends of the first coupling portion and the second coupling portion that are close to the first plate; or, the connecting portion is located at the ends of the first coupling portion and the second coupling portion that are away from the first plate; or, the connecting portion is located in the middle of the first coupling portion and the second coupling portion.

3. The capacitive coupling component according to claim 1, wherein: The coupling member is a cylindrical structure with a truncation groove extending through the cylindrical wall, and the truncation groove is extended along the axial direction of the coupling member.

4. The capacitive coupling component according to claim 1, wherein: The capacitive coupling component includes an insulating seat, which is arranged between the end side of the coupling member and the corresponding plate of the filter housing and is fixed relative to the filter housing. The insulating seat is provided with a limiting groove, and the coupling member is interference-fitted into the limiting groove.

5. The capacitive coupling component according to claim 4, wherein: The insulating seat is provided with a locking protrusion, and the locking protrusion is locked in the gap between the first coupling part and the second coupling part to limit the circumferential rotation of the coupling member.

6. The capacitive coupling component according to claim 1, wherein: The capacitive coupling component comprises a dielectric cylinder, and the coupling member and the flow guide member are both arranged in the cylinder of the dielectric cylinder.

7. The capacitive coupling component according to claim 4, wherein: The capacitive coupling component includes a dielectric cylinder, the coupling member and the flow guide member are both arranged in the cylinder of the dielectric cylinder; the insulating seat and the dielectric cylinder are an integrated structure.

8. The capacitive coupling component according to claim 6, wherein: The opposite ends of the medium cylinder are respectively in contact with the first plate and the second plate.

9. The capacitive coupling component according to any one of claims 1 to 8, wherein: The flow guide member is connected and fixed to the mounting member so that the flow guide member moves axially synchronously with the mounting member.

10. The capacitive coupling component according to claim 9, wherein: The cross-sectional shapes of the slideway and the guide member are both circular, and the guide member rotates circumferentially and moves axially synchronously with the mounting member.

11. The capacitive coupling component according to any one of claims 1 to 8, wherein: The mounting member is a screw, the capacitive coupling component includes a nut, and one end of the mounting member away from the flow guide member is passed through a corresponding plate of the filter housing and is threadedly connected to the nut.

12. The capacitive coupling component according to any one of claims 1 to 8, wherein: The mounting member is an insulating member.

13. A filter, characterized in that: The invention comprises a filter housing, a plurality of resonant rods, and at least one capacitive coupling component according to any one of claims 1 to 12, wherein the capacitive coupling component and the resonant rods are both arranged in the filter housing.

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