Capacitive coupling assembly and filter

Abstract

The utility model relates to the field of communication, and provides a capacitive coupling assembly and a filter. The capacitive coupling assembly is arranged in the filter shell, and the filter shell is provided with a first plate and a second plate which are oppositely arranged. The capacitive coupling assembly comprises a dielectric cylinder, a mounting piece and a coupling piece, and the dielectric cylinder is vertically arranged between the first plate and the second plate; the mounting piece is movably mounted on the first plate piece; and the coupling piece is arranged in the medium cylinder body and is not grounded, and the coupling piece is connected to the mounting piece and can be driven by the mounting piece to move so as to adjust the capacitive coupling amount. Based on the above structure, the capacitive coupling assembly can enable the two resonance rods to realize capacitive coupling with an optimized and reliable structure, the capacitive coupling assembly has adjustability, the capacitive coupling strength and the capacitive coupling amount are enhanced, the coupling piece moves in the inner space of the medium cylinder to adjust the capacitive coupling amount, and the adjustable range of the capacitive coupling amount can be expanded, so that the capacitive coupling effect is improved. The adjustable quantity is increased.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and in particular relates to a capacitive coupling component and filter. Background Technology

[0002] In some cases, the filter includes a filter housing, a plurality of resonant rods disposed within the filter housing, and at least one capacitive coupling assembly. The capacitive coupling assembly includes a mounting member installed on the wall of the filter housing, and a coupling member installed on the mounting member. The coupling member is positioned between two resonant rods and enables capacitive coupling between the two resonant rods. The coupling member can rotate circumferentially or move axially to adjust the amount of capacitive coupling between the two resonant rods. However, the capacitive coupling strength achieved by this capacitive coupling assembly is relatively weak, and the adjustable range of the capacitive coupling amount is small. Utility Model Content

[0003] This application provides a capacitive coupling component and filter, aiming to solve the problems of weak capacitive coupling strength and small adjustable range of capacitive coupling amount achieved by existing capacitive coupling components.

[0004] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0005] In a first aspect, a capacitive coupling assembly is provided, disposed within a filter housing, the filter housing having a first plate and a second plate disposed opposite to each other, the capacitive coupling assembly comprising:

[0006] The medium cylinder is erected between the first plate and the second plate;

[0007] Mounting component, movably mounted to the first plate;

[0008] A coupling element is disposed inside the medium cylinder and is not grounded. The coupling element is connected to the mounting element and can move under the drive of the mounting element to adjust the capacitive coupling amount.

[0009] In some embodiments, the capacitive coupling assembly includes an insulating plate, the insulating plate being sealed to the opening of the dielectric cylinder away from the first plate.

[0010] In some embodiments, the insulating plate and the dielectric cylinder are an integrated structure.

[0011] In some embodiments, the mounting element is an insulating element.

[0012] In some embodiments, the coupling member is a rod-shaped structure, and a cut-off groove is formed on the end face of the coupling member away from the mounting member. The cut-off groove is arranged radially through the coupling member and extends axially along the coupling member. Along the axial direction of the coupling member, the extension length of the cut-off groove is less than the length of the coupling member.

[0013] In some embodiments, the coupling member is fixedly connected to the mounting member, such that the coupling member moves synchronously with the mounting member.

[0014] In some embodiments, the coupling member rotates circumferentially and moves axially with the mounting member.

[0015] 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 coupling member passes through the first plate and is threadedly connected to the nut.

[0016] In some embodiments, the opposite ends of the medium cylinder abut against the first plate and the second plate, respectively.

[0017] In some embodiments, the medium cylinder is a cuboid with a circular hole in the center.

[0018] Secondly, a filter is provided, including a filter housing and a capacitive coupling component provided in the embodiments of this application.

[0019] The beneficial effects of the capacitive coupling component provided in this application are as follows:

[0020] The capacitive coupling assembly provided in this application embodiment can achieve capacitive coupling of two resonant rods through a coupling element that is not grounded; the coupling element can be connected and supported by a mounting element that is movably installed on the first plate, and the coupling element can be moved to adjust the amount of capacitive coupling; the effective dielectric constant between the coupling element and the resonant rod can be increased by a dielectric cylinder sleeved around the coupling element, thereby greatly enhancing the capacitive coupling. Therefore, the capacitive coupling assembly can achieve capacitive coupling of two resonant rods with an optimized and reliable structure, and has adjustability, while enhancing the capacitive coupling strength and amount. Furthermore, since the coupling element moves within the dielectric cylinder to adjust the amount of capacitive coupling, the adjustable range of the capacitive coupling amount can be expanded, i.e., the adjustable amount can be increased. Attached Figure Description

[0021] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional schematic diagram of a filter provided in some embodiments of this application;

[0023] Figure 2 for Figure 1 A top view of the provided filter;

[0024] Figure 3 for Figure 2 The provided sectional view along AA;

[0025] Figure 4 for Figure 1 A schematic diagram of the filter's decomposition is provided;

[0026] Figure 5 A cross-sectional view of a filter provided in some other embodiments of this application, wherein the capacitive coupling assembly includes an insulating plate, the bottom of which is sealed and connected to the opening of the dielectric cylinder away from the first plate;

[0027] Figure 6 This is a three-dimensional schematic diagram of a coupling element provided in some embodiments of this application.

[0028] The following are the labeling elements in the figure:

[0029] 10-Capacitive coupling assembly, 11-Dielectric cylinder, 12-Mounting component, 13-Coupled component, 131-Cut-off groove, 132-First coupling part, 133-Connecting part, 134-Second coupling part, 135-Positioning hole, 14-Insulating plate, 15-Nut, 20-Filter housing, 21-First plate, 22-Second plate, 30-Resonant rod, 40-Base platform, 50-Coupled rib. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0031] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, "central axis" refers to a line that passes through the geometric center of the corresponding structure.

[0035] In this application, "axial" refers to the direction of extension of the central axis of the corresponding structure, "circumferential" refers to the direction of encirclement around the central axis of the corresponding structure, and "radial" refers to any direction of the corresponding structure that passes through the central axis and is perpendicular to the central axis.

[0036] In some cases, the filter includes a filter housing, a plurality of resonant rods disposed within the filter housing, and at least one capacitive coupling assembly. The capacitive coupling assembly includes a mounting member installed on the wall of the filter housing, and a coupling member installed on the mounting member. The coupling member is positioned between two resonant rods and enables capacitive coupling between the two resonant rods. The coupling member can rotate circumferentially or move axially to adjust the amount of capacitive coupling between the two resonant rods. However, the capacitive coupling strength achieved by this capacitive coupling assembly is relatively weak, and the adjustable range of the capacitive coupling amount is small.

[0037] The embodiments provided in this application will solve the above problems.

[0038] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0039] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 Some embodiments of this application provide a capacitive coupling assembly 10 disposed within a filter housing 20, the filter housing 20 having a first plate 21 and a second plate 22 disposed opposite to each other. The capacitive coupling assembly 10 includes a dielectric cylinder 11, a mounting member 12, and a coupling member 13. The dielectric cylinder 11 is erected between the first plate 21 and the second plate 22; the mounting member 12 is movably mounted on the first plate 21; the coupling member 13 is disposed inside the dielectric cylinder 11 and is not grounded, the coupling member 13 is connected to the mounting member 12, and can move under the drive of the mounting member 12 to adjust the capacitive coupling amount.

[0040] It should be noted that the capacitive coupling component 10 can be applied to filter products.

[0041] The filter includes a filter housing 20. The filter housing 20 has a closed internal cavity, providing shielding to prevent signal leakage. One side of the filter housing 20 has a first plate 21, and the opposite side has a second plate 22. In practical applications, the filter can be placed with the first plate 21 facing upwards, or with the first plate 21 facing left, right, forward, or backwards. Furthermore, the shape, size, and material of the filter housing 20 can be flexibly configured as needed.

[0042] The filter also includes multiple resonant rods 30 disposed within the filter housing 20. The multiple resonant rods 30 are arranged as needed to establish the required 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 directly or via other components connected and fixed to the second plate 22 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 parallel plate capacitor therebetween. 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, snap-fit, etc., or indirectly connected and fixed to the second plate 22 via other structures connected to it (such as the base 40, mounting post, coupling rib 50, etc.). Among them, the resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made 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, an irregularly shaped rod, a sheet resonant rod, a sheet metal resonant rod, or other resonant rods of other shapes, etc.

[0043] The capacitive coupling component 10 can be disposed between any two resonant rods 30 to enable capacitive coupling between the two resonant rods 30.

[0044] The capacitive coupling component 10 can be disposed between two adjacent resonant rods 30 to achieve capacitive coupling between the two resonant rods 30. The two adjacent resonant rods 30 are adjacent on the main signal transmission path; that is, the coupling achieved by the capacitive coupling component 10 between these two resonant rods is a coupling relationship on the main signal transmission path. In other words, the coupling relationship between these two resonant rods 30 is cascaded.

[0045] When the number of resonant rods 30 is at least three, the capacitive coupling component 10 can be disposed between two non-adjacent resonant rods 30 to achieve capacitive cross-coupling between the two resonant rods 30. Two non-adjacent resonant rods 30 mean that they are not adjacent on the main signal transmission path; that is, the coupling achieved by the capacitive coupling component 10 between these two resonant rods 30 is cross-coupling, meaning that the coupling relationship between these two resonant rods 30 is non-cascaded.

[0046] It should also be noted that the capacitive coupling assembly 10 includes a mounting member 12 and a coupling member 13. The mounting member 12 is mainly used to mount and support the coupling member 13. The mounting member 12 is movably mounted to the first plate 21. Figure 3As shown, in some embodiments, the mounting member 12 is inserted and installed on the first plate 21, and the mounting member 12 can move axially and rotate circumferentially relative to the first plate 21. For example, the mounting member 12 can be a screw or a smooth round rod. After adjustment, the mounting member 12 can be fixed to the first plate 21 by means of threaded self-locking, snap-fit ​​fixing, adhesive fixing, welding fixing, etc. In other embodiments, the mounting member 12 is inserted and installed on the first plate 21, and the mounting member 12 can move axially relative to the first plate 21. The mounting member 12 is circumferentially limited (i.e., restricted from circumferential rotation) relative to the first plate 21. For example, the mounting member 12 can be a polygonal rod. The mounting member 12 can move axially relative to the first plate 21 but is restricted from circumferential rotation. After adjustment, the mounting member 12 can be fixed to the first plate 21 by means of snap-fit ​​fixing, adhesive fixing, welding fixing, etc. In other embodiments, the mounting member 12 is through-mounted to the first plate 21, the mounting member 12 is circumferentially rotatable relative to the first plate 21, and the mounting member 12 is axially limited relative to the first plate 21 (i.e., its axial movement is restricted); for example, the mounting member 12 is rotatably mounted to the first plate 21 and can be fastened to the first plate 21 (e.g., hook, buckle, etc.) to be axially limited relative to the first plate 21.

[0047] The coupling element 13 is mounted and connected to the mounting element 12. The coupling element 13 can be entirely made of metal, or its surface can be coated with a metal layer (the portion supporting the metal layer can be made of non-metallic material). The coupling element 13 is not grounded, meaning it is not grounded to the first plate 21 or the second plate 22, allowing it to capacitively couple the two resonant rods 30. The mounting element 12 can be an insulator, or an insulator can be placed at the connection between the mounting element 12 and the coupling element 13, or at the connection between the mounting element 12 and the first plate 21, so that the coupling element 13 is not grounded to the first plate 21. The range of motion of the coupling element 13 can be constrained to ensure it is always spaced from the second plate 22, or an insulator can be placed between the coupling element 13 and the second plate 22, so that the coupling element 13 is not grounded to the second plate 22.

[0048] The coupling element 13 is movable (e.g., axially moving and / or circumferentially rotating) under the drive of the mounting element 12 to adjust the amount of capacitive coupling. Figure 3As shown, in some embodiments, the coupling member 13 is fixedly connected to the mounting member 12, so that the coupling member 13 moves synchronously with the mounting member 12 (e.g., synchronous axial movement and circumferential rotation; or synchronous axial movement; or synchronous circumferential rotation). The connection and fixing method between the coupling member 13 and the mounting member 12 can be, but is not limited to, bonding, welding, pressing, plugging, snap-fitting, etc. In other embodiments, the coupling member 13 is threadedly connected to the mounting member 12, so that rotation of the mounting member 12 can drive the coupling member 13 to move axially along the mounting member 12.

[0049] When the capacitive coupling component 10 is positioned between two adjacent resonant rods 30, the amount of capacitive coupling is adjusted, i.e., the capacitive coupling strength between the two resonant rods 30 is adjusted. When the capacitive coupling component 10 is positioned between two non-adjacent resonant rods 30, the amount of capacitive coupling is adjusted, i.e., the passband and out-of-band suppression is tuned.

[0050] It should also be noted that the capacitive coupling assembly 10 further includes a dielectric cylinder 11. The dielectric cylinder 11 can be made of a material with a high dielectric constant, such as a ceramic dielectric component, a nylon plastic component, a silicone component, etc. The dielectric constant of the dielectric cylinder 11 is greater than that of air.

[0051] The medium cylinder 11 is cylindrical. The external outline and the internal space of the medium cylinder 11 can be the same or different; for example, the external outline of the medium cylinder 11 can be cuboid, and the internal space can be cylindrical; or both the external outline and the internal space of the medium cylinder 11 can be cylindrical, making the medium cylinder 11 cylindrical; or the external outline of the medium cylinder 11 can be cylindrical, and the internal space can be cuboid; and so on.

[0052] The dielectric cylinder 11 is erected between the first plate 21 and the second plate 22, meaning that the dielectric cylinder 11 is vertically positioned between the first plate 21 and the second plate 22, and the axial direction of the dielectric cylinder 11 is substantially perpendicular to the first plate 21 and the second plate 22. The dielectric cylinder 11 can be positioned and connected to the filter housing 20 (e.g., at least one of the first plate 21 and the second plate 22, or an isolation wall located around the dielectric cylinder 11, etc.) to stabilize its installation position and state. The dielectric cylinder 11 can be detachably connected or fixedly connected to the filter housing 20 for positioning and connection.

[0053] The coupling element 13 is disposed inside the dielectric cylinder 11, and in particular, the coupling element 13 moves within the space inside the dielectric cylinder 11 (e.g., axial movement and / or circumferential rotation). Based on this, according to the capacitance formula C = Sε / (4πdk) (where C represents capacitance, S represents relative coupling area, ε represents effective dielectric constant of the dielectric, d represents relative distance, and k is a constant), by increasing the effective dielectric constant between the coupling element 13 and the resonant rod 30 through the dielectric cylinder 11, the capacitive coupling can be enhanced to a greater extent. This enhances the capacitive coupling strength and amount achieved by the capacitive coupling assembly 10. Furthermore, since the coupling element 13 moves within the space inside the dielectric cylinder 11 to adjust the amount of capacitive coupling, the adjustable range of the amount of capacitive coupling can be expanded, and the adjustable amount can be increased.

[0054] Furthermore, according to the formula E=Q / (4πεr) 2 (where 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 11 increases the effective dielectric constant between the coupling element 13 and the resonant rod 30, the electric field strength can be effectively reduced, thereby reducing the risk of electric field breakdown and sparking caused by excessive electric field strength.

[0055] In summary, the capacitive coupling assembly 10 provided in this application embodiment can achieve capacitive coupling of the two resonant rods 30 through the ungrounded coupling member 13; the coupling member 13 can be connected and supported by the mounting member 12 movably installed on the first plate 21, and the coupling member 13 can be moved to adjust the amount of capacitive coupling; the effective dielectric constant between the coupling member 13 and the resonant rods 30 can be increased by the dielectric cylinder 11 sleeved on the outer periphery of the coupling member 13, thereby greatly enhancing the capacitive coupling. Therefore, the capacitive coupling assembly 10 can achieve capacitive coupling of the two resonant rods 30 with an optimized and reliable structure, and has adjustability, while enhancing the capacitive coupling strength and amount. Furthermore, since the coupling member 13 moves within the space inside the dielectric cylinder 11 to adjust the amount of capacitive coupling, the adjustable range of the capacitive coupling amount can be expanded, i.e., the adjustable amount is increased.

[0056] Furthermore, existing technologies are prone to electric field breakdown and arcing due to the close proximity of the coupling element and the resonant rod. In this embodiment, the capacitive coupling component 10 increases the effective dielectric constant between the coupling element 13 and the resonant rod 30 via the dielectric cylinder 11, effectively reducing the electric field strength. This reduces the risk of electric field breakdown and arcing caused by excessive electric field strength, improving the reliability and lifespan of the capacitive coupling component 10 and the filter.

[0057] Furthermore, with the continuous development of 5G (5th Generation Mobile Communication Technology), filters and wireless communication systems are gradually becoming miniaturized. Achieving capacitive coupling within the small space of miniaturized filters becomes difficult. However, the capacitive coupling component 10 of this embodiment requires less space and fewer components for installation and assembly, making it particularly suitable for the needs of miniaturized filters. Moreover, under the constraint of limited space, the capacitive coupling component 10 of this embodiment can enhance the capacitive coupling strength and amount while ensuring a safe distance, thereby solving the problem of difficulty in achieving strong capacitive coupling in small spaces. Of course, the capacitive coupling component 10 of this embodiment is also applicable to conventional filter products with capacitive coupling requirements, making it suitable for a wide range of scenarios.

[0058] Furthermore, the capacitive coupling component 10 of this embodiment can adjust the amount of capacitive coupling by moving the coupling element 13, which can reduce the sensitivity to processing errors, reduce the requirements for processing accuracy and assembly accuracy, reduce processing difficulty, debugging difficulty, maintenance difficulty, maintenance cost, and production scrap rate, and improve the production yield.

[0059] Please see Figure 5 In some embodiments of this application, the capacitive coupling assembly 10 includes an insulating plate 14, which is connected to the bottom of the dielectric cylinder 11 away from the opening of the first plate 21.

[0060] It should be noted that the insulating plate 14 is a component made of insulating material and has insulating properties. The insulating plate 14 is connected to the end of the medium cylinder 11 away from the first plate 21 and closes the opening of the medium cylinder 11 away from the first plate 21. The insulating plate 14 and the medium cylinder 11 can be integrally connected or separately connected. The separate connection method can be, but is not limited to, bonding, welding, fastening with fasteners (such as screws, pins, etc.), snap-fit ​​connection, threaded connection, etc.

[0061] By adopting the above scheme, the opening of the dielectric cylinder 11 away from the first plate 21 can be closed by the insulating plate 14, so that the insulating plate 14 and the dielectric cylinder 11 enclose the active space of the coupling member 13, thereby restricting the range of motion of the coupling member 13; the insulating plate 14 can reliably insulate and block the coupling member 13 from the second plate 22, so that the coupling member 13 is not grounded to the second plate 22. Based on this, it is easy to make the coupling member 13 ungrounded, so that the capacitive coupling component 10 can reliably and stably cause the two resonant rods 30 to achieve capacitive coupling instead of inductive coupling through the coupling member 13, which can maintain the coupling polarity of the capacitive coupling component 10 and maintain and optimize the filtering performance and frequency selectivity characteristics of the filter.

[0062] Of course, such as Figure 3 As shown, in other embodiments, the insulating plate 14 can be omitted, that is, the opening of the medium cylinder 11 away from the first plate 21 is not closed, but the range of motion of the coupling member 13 is constrained so that the coupling member 13 is always spaced from the second plate 22, so that the coupling member 13 is not grounded to the second plate 22.

[0063] Please see Figure 5 In some embodiments of this application, the insulating plate 14 and the dielectric cylinder 11 are an integrated structure. That is, the insulating plate 14 and the dielectric cylinder 11 are integrally connected and integrally formed. The integral forming method can be, but is not limited to, injection molding, sintering, 3D printing, etc.

[0064] By adopting the above-mentioned solution, and making the insulating plate 14 and the dielectric cylinder 11 an integrated structure, on the one hand, it is easier to process the insulating plate 14 and the dielectric cylinder 11 together, enabling a seamless connection between them, eliminating assembly gaps, reducing the risk of mechanical loosening, and thus improving processing convenience, processing efficiency, processing accuracy, structural stability, and structural reliability. On the other hand, it eliminates the need for connecting parts (such as adhesives, screws, clips, etc.) between the insulating plate 14 and the dielectric cylinder 11, reducing the number of components in the capacitive coupling assembly 10, thereby simplifying and optimizing the structure of the capacitive coupling assembly 10, and facilitating the simplification, weight reduction, and integration of the capacitive coupling assembly 10 and the filter. On the other hand, it simplifies the positioning and assembly processes between the insulating plate 14 and the dielectric cylinder 11, thereby improving the assembly convenience and efficiency of the capacitive coupling assembly 10, and increasing the production yield of the capacitive coupling assembly 10.

[0065] Please see Figure 3 , Figure 4 , Figure 5 In some embodiments of this application, the mounting element 12 is an insulating element.

[0066] It should be noted that the mounting component 12 is an insulating component made of insulating material and has insulating properties. For example, the mounting component 12 can be an insulating non-metallic component, such as a plastic screw, etc.

[0067] By adopting the above scheme, and by making the mounting component 12 an insulating component, it can be directly and insulatedly connected between the coupling component 13 and the first plate 21, thereby blocking the grounding path. This ensures that the coupling component 13 is not grounded to the first plate 21, facilitating its ungrounded configuration. This allows the capacitive coupling assembly 10 to reliably and stably achieve capacitive coupling rather than inductive coupling between the two resonant rods 30 via the coupling component 13. This maintains the coupling polarity of the capacitive coupling assembly 10 and maintains and optimizes the filter's filtering performance and frequency selectivity. Furthermore, based on the configuration of this embodiment, it is unnecessary to add additional insulating components at the connection points between the mounting component 12 and the coupling component 13, or between the mounting component 12 and the first plate 21. This reduces the number of components in the capacitive coupling assembly 10, simplifies and optimizes its structure, and facilitates the simplification, lightweighting, and integration of the capacitive coupling assembly 10 and the filter. It also simplifies the assembly process of the capacitive coupling assembly 10, improving its assembly convenience and efficiency.

[0068] Of course, in other embodiments, an insulating element can be provided at the connection between the mounting member 12 and the coupling member 13, or at the connection between the mounting member 12 and the first plate 21, so that the coupling member 13 is not grounded to the first plate 21. In this case, the mounting member 12 can be a conductive element (e.g., a metal element, etc.).

[0069] Please see Figure 3 , Figure 4 , Figure 6 In some embodiments of this application, the coupling member 13 is a rod-shaped structure. A cut-off groove 131 is provided on the end face of the coupling member 13 away from the mounting member 12. The cut-off groove 131 is arranged to pass through the radial direction of the coupling member 13 and to extend along the axial direction of the coupling member 13. Along the axial direction of the coupling member 13, the extension length of the cut-off groove 131 is less than the length of the coupling member 13.

[0070] It should be noted that the coupling element 13 is a rod-shaped structure. For example, the coupling element 13 can be a circular rod (i.e., a cylinder), a polygonal rod (e.g., a cuboid), an irregularly shaped rod, etc.

[0071] The coupling member 13 is provided with a cut-off groove 131, which is formed on the end face of the coupling member 13 away from the mounting member 12 and extends along the axial direction of the coupling member 13. The "extension length of the cut-off groove 131 along the axial direction of the coupling member 13" is less than the "length of the coupling member 13 along its own axial direction", so that the end of the cut-off groove 131 near the mounting member 12 is spaced apart from the end face of the coupling member 13 near the mounting member 12. The cut-off groove 131 penetrates the coupling member 13 radially. Based on this, the cut-off groove 131 can cut the rod-shaped coupling member 13 into a U-shaped structure, so that the coupling member 13 includes a first coupling part 132, a connecting part 133, and a second coupling part 134 connected in sequence. The first coupling part 132 and the second coupling part 134 are respectively disposed on opposite sides of the cut-off groove 131. The connecting part 133 is disposed between the end of the cut-off groove 131 near the mounting member 12 and the end face of the coupling member 13 near the mounting member 12. This allows the current path in the coupling member 13 to bend along the first coupling part 132, the connecting part 133, and the second coupling part 134, instead of being a straight path along the radial direction of the coupling member 13. This can lengthen the current path and enhance the capacitive coupling strength and amount. The cutting-off groove 131 can be processed by, but is not limited to, milling.

[0072] By adopting the above scheme, based on the rod-shaped coupling member 13, a cutting groove 131 is formed on the end face of the coupling member 13 away from the mounting member 12. This cutting groove 131 cuts the rod-shaped coupling member 13 into a U-shaped structure, resulting in the coupling member 13 including a first coupling portion 132, a connecting portion 133, and a second coupling portion 134 connected in sequence. Based on this, the current path in the coupling member 13 is caused to bend along the first coupling portion 132, the connecting portion 133, and the second coupling portion 134, rather than following a straight path radially along the coupling member 13. This extends the current path and enhances the capacitive coupling effect. Furthermore, compared to bending the coupling piece to form a U-shaped structure, this embodiment forms a U-shaped structure by machining a cutting groove 131 on the rod-shaped coupling member 13, effectively reducing machining errors caused by bending and improving machining accuracy. This, in turn, improves the accuracy, consistency, and reliability of the coupling member 13.

[0073] Of course, in other embodiments, under the condition that "the movement of the coupling element 13 can change the amount of capacitive coupling", the coupling element 13 may take other forms, such as rectangular sheet, mountain-shaped sheet, U-shaped sheet, irregular sheet, cylindrical, prismatic, irregular column or other forms, etc.

[0074] Please see Figure 3 , Figure 4 , Figure 5In some embodiments of this application, the coupling member 13 is fixedly connected to the mounting member 12, so that the coupling member 13 moves synchronously with the mounting member 12.

[0075] It should be noted that the coupling member 13 is connected and fixed to the mounting member 12, so that the coupling member 13 moves synchronously with the mounting member 12 (e.g., synchronous axial movement and circumferential rotation; or synchronous axial movement; or synchronous circumferential rotation). The connection and fixing method between the coupling member 13 and the mounting member 12 can be, but is not limited to, bonding, welding, pressing, plugging, snap-fitting, etc.

[0076] By adopting the above scheme, the coupling element 13 and the mounting element 12 are rigidly connected and fixed to achieve synchronous movement (such as axial movement, circumferential rotation or compound movement) of the two. This can make the coupling element 13 and the mounting element 12 have consistent movement, and can facilitate the determination, adjustment and control of the movement state of the coupling element 13 directly based on the movement state of the mounting element 12. It can reduce the discrepancy between the actual displacement or actual rotation angle of the coupling element 13 and the adjustment amount due to loosening or backlash, thereby reducing the uncertainty in the adjustment process, facilitating the precise adjustment of the capacitive coupling amount, and improving the adjustment accuracy and debugging efficiency of the capacitive coupling assembly 10.

[0077] like Figure 3 , Figure 4 , Figure 6 As shown, in some embodiments, the coupling member 13 is provided with a positioning hole 135 on the side near the mounting member 12. The mounting member 12 is inserted into the positioning hole 135 and connected and fixed to the coupling member 13. This arrangement can improve the positioning accuracy between the coupling member 13 and the mounting member 12 through the positioning hole 135, and can improve the convenience of the coupling member 13 and the mounting member 12, the fitting accuracy, the connection stability and the connection reliability.

[0078] Of course, in other embodiments, the coupling member 13 may be threadedly connected to the mounting member 12, so that the rotation of the mounting member 12 can drive the coupling member 13 to move along the axial direction of the mounting member 12.

[0079] Please see Figure 3 , Figure 4 , Figure 5 In some embodiments of this application, the coupling member 13 rotates circumferentially and moves axially with the mounting member 12.

[0080] It should be noted that the coupling member 13 is fixedly connected to the mounting member 12, so that the coupling member 13 moves axially and rotates circumferentially synchronously with the mounting member 12.

[0081] During the circumferential rotation of the coupling element 13, the coupling area between the coupling element 13 and the two resonant rods 30 changes, thereby adjusting the amount of capacitive coupling. For example, within the 360° circumferential rotation cycle of the coupling element 13, if the cut-off groove 131 of the coupling element 13 rotates to face the resonant rod 30, the coupling area between the coupling element 13 and the two resonant rods 30 will be smaller, resulting in a smaller amount of capacitive coupling and weaker capacitive coupling; if the first coupling part 132 and the second coupling part 134 of the coupling element 13 rotate to face the resonant rod 30, the coupling area between the coupling element 13 and the two resonant rods 30 will be larger, resulting in a larger amount of capacitive coupling and stronger capacitive coupling; therefore, within the 360° circumferential rotation cycle of the coupling element 13, the amount of capacitive coupling changes approximately periodically.

[0082] During the axial movement of the coupling element 13, since the electric field is concentrated on the side closer to the first plate 21 (the magnetic field is concentrated on the side closer to the second plate 22), a small movement of the coupling element 13 towards or away from the first plate 21 will cause a large and significant change in the capacitive coupling. Specifically, if the coupling element 13 moves towards the first plate 21 and does not move upward beyond the resonant rod 30, the capacitive coupling increases and the capacitive coupling is enhanced; if the coupling element 13 moves towards the first plate 21 and gradually exceeds the resonant rod 30, causing the coupling area between the coupling element 13 and the two resonant rods 30 to gradually decrease, the capacitive coupling may decrease and the capacitive coupling may weaken; if the coupling element 13 moves away from the first plate 21, the capacitive coupling decreases and the capacitive coupling weakens.

[0083] Therefore, during the combined motion of the coupling element 13 rotating circumferentially and moving axially with the mounting element 12, the amount of capacitive coupling is adjusted nonlinearly.

[0084] By adopting the above scheme, the capacitive coupling amount can be nonlinearly adjusted by making the coupling member 13 rotate circumferentially and move axially with the mounting member 12. Based on this, the capacitive coupling assembly 10 can be made adjustable, and the adjustability flexibility of the capacitive coupling assembly 10 can be improved. Furthermore, by combining the circumferential rotation stroke and axial movement stroke of the coupling member 13, the adjustable range of the capacitive coupling amount can be expanded, thereby enabling the capacitive coupling assembly 10 to have a wider adjustable range and adapt to different coupling requirements.

[0085] Of course, in other embodiments, the coupling member 13 may move axially or rotate circumferentially with the mounting member 12.

[0086] Please see Figure 3 , Figure 4 , Figure 5In some embodiments of this application, the mounting member 12 is a screw, the capacitive coupling assembly 10 includes a nut 15, and the end of the mounting member 12 away from the coupling member 13 passes through the first plate 21 and is threadedly connected to the nut 15.

[0087] It should be noted that the mounting member 12 is a screw, and its outer surface has external threads. The nut 15 has internal threads. The end of the mounting member 12 away from the coupling member 13 passes through the first plate 21, and the end of the mounting member 12 away from the coupling member 13 is threaded into the nut 15. The nut 15 can be located outside the first plate 21 or embedded within it. The nut 15 can be an insulating component (e.g., a plastic nut); or, provided that the coupling member 13 is not grounded to the first plate 21 (e.g., when the mounting member 12 is an insulating component), the nut 15 can be a conductive component (e.g., a metal nut).

[0088] By adopting the above scheme, based on the threaded connection between the mounting part 12 and the nut 15, the mounting part 12 can be rotated circumferentially relative to the nut 15 and moved axially, thereby driving the coupling part 13 to rotate circumferentially and move axially with the mounting part 12. This achieves nonlinear adjustment of the capacitive coupling amount and facilitates repeated and precise adjustment of the capacitive coupling amount, thereby improving the adjustability, convenience, accuracy, and debugging efficiency of the capacitive coupling assembly 10. Furthermore, after debugging, without external force driving the mounting part 12 to rotate circumferentially relative to the nut 15, the mounting part 12 can self-lock with the nut 15 through its thread, thus stabilizing its installation position and state relative to the first plate 21. This stabilizes the position and state of the coupling part 13, stabilizes the adjusted capacitive coupling amount, and improves the reliability of the capacitive coupling assembly 10.

[0089] Of course, in other embodiments, the nut 15 can be omitted, and the end of the mounting member 12 away from the coupling member 13 can be directly threaded to the threaded hole of the first plate 21.

[0090] In other embodiments, the mounting member 12 can be a screw or a smooth round rod. The mounting member 12 can be inserted and installed on the first plate 21. The mounting member 12 can move axially and rotate circumferentially relative to the first plate 21, so as to drive the coupling member 13 to rotate circumferentially and move axially with the mounting member 12, thereby realizing nonlinear adjustment of the capacitive coupling amount. After the debugging is completed, the mounting member 12 can be fixed relative to the first plate 21 by means of snap-fit ​​fixing, adhesive fixing, welding fixing, etc., so as to stabilize the adjusted capacitive coupling amount.

[0091] Please see Figure 3 , Figure 5 In some embodiments of this application, the opposite ends of the medium cylinder 11 abut against the first plate 21 and the second plate 22, respectively.

[0092] It should be noted that, along the axial direction of the medium cylinder 11, one end of the medium cylinder 11 abuts against the first plate 21, and the other end of the medium cylinder 11 abuts against the second plate 22. The medium cylinder 11 may be interference-fitted or transition-fitted between the first plate 21 and the second plate 22.

[0093] By adopting the above scheme, by having the two opposite ends of the medium cylinder 11 abut against the first plate 21 and the second plate 22 respectively, the medium cylinder 11 can be limited and installed between the first plate 21 and the second plate 22, thereby restricting the medium cylinder 11 from moving along the axial direction of the medium cylinder 11. This allows for convenient, quick, and reliable stabilization of the installation position and state of the medium cylinder 11 between the first plate 21 and the second plate 22. Furthermore, it can make the axial length of the dielectric cylinder 11 match the spacing between the first plate 21 and the second plate 22, thereby enabling the dielectric cylinder 11 to cover the range of motion of the coupling member 13, ensuring that the coupling member 13 remains within the dielectric cylinder 11 during adjustment, and enabling the dielectric cylinder 11 to comprehensively and reliably increase the effective dielectric constant between the coupling member 13 and the resonant rod 30. It can also reduce the risk of abrupt changes in the effective dielectric constant between the coupling member 13 and the resonant rod 30 due to the coupling member 13 being accidentally exposed outside the dielectric cylinder 11, thereby maintaining and optimizing the capacitive coupling effect achieved by the capacitive coupling assembly 10.

[0094] In some embodiments, based on the fact that the media cylinder 11 abuts against the first plate 21 and the second plate 22 at opposite ends, the media cylinder 11 can be connected and fixed to the first plate 21 or the second plate 22. The connection and fixing methods can be, but are not limited to, bonding, welding, pressing, plugging, snapping, threaded connection, etc.

[0095] Of course, in other embodiments, the dielectric cylinder 11 may be limited to the filter housing 20 (e.g., at least one of the first plate 21 and the second plate 22, or an isolation wall located around the dielectric cylinder 11, etc.) to stabilize its installation position and installation state; wherein, the dielectric cylinder 11 may be detachably connected or fixedly connected to achieve limited connection with the filter housing 20.

[0096] Please see Figure 3 , Figure 4 , Figure 5 In some embodiments of this application, the medium cylinder 11 is a cuboid with a circular hole in the middle. The circular hole extends through the cuboid along its own axial direction.

[0097] By adopting the above scheme, making the dielectric cylinder 11 a cuboid with a circular hole in the center, on the one hand, the outer contour of the dielectric cylinder 11 is cuboid, which facilitates the upright placement of the dielectric cylinder 11 between the first plate 21 and the second plate 22. This also facilitates the limiting fit between the dielectric cylinder 11 and the filter housing 20 (e.g., the first plate 21, the second plate 22, the coupling window, etc.), ensuring the reliable and stable installation position and state of the dielectric cylinder 11. On the other hand, making the internal space of the dielectric cylinder 11 cylindrical improves the adaptability of the internal space of the dielectric cylinder 11 to the movement (e.g., circumferential rotation and / or axial movement) of the coupling element 13, reducing the risk of jamming when the coupling element 13 moves within the dielectric cylinder 11, and maintaining the adjustability and flexibility of the capacitive coupling assembly 10. Furthermore, the cuboid shape with a circular hole in the center facilitates processing, thereby improving the ease of processing, efficiency, and accuracy of the dielectric cylinder 11.

[0098] Of course, in other embodiments, the shape of the outer contour and the inner space of the medium cylinder 11 can be set as needed. For example, the outer contour and the inner space of the medium cylinder 11 can both be cylindrical, so that the medium cylinder 11 is cylindrical; or, for example, the outer contour of the medium cylinder 11 can be cylindrical, and the shape of the inner space can be cuboid; and so on.

[0099] Please see Figure 1 , Figure 3 , Figure 4 Some embodiments of this application provide a filter, including a filter housing 20 and a capacitive coupling component 10 provided in embodiments of this application.

[0100] It should be noted that the capacitive coupling component 10 can be applied to filter products.

[0101] The filter includes a filter housing 20. The filter housing 20 has a closed internal cavity, providing shielding to prevent signal leakage. One side of the filter housing 20 has a first plate 21, and the opposite side has a second plate 22. In practical applications, the filter can be placed with the first plate 21 facing upwards, or with the first plate 21 facing left, right, forward, or backwards. Furthermore, the shape, size, and material of the filter housing 20 can be flexibly configured as needed.

[0102] The filter also includes multiple resonant rods 30 disposed within the filter housing 20. The multiple resonant rods 30 are arranged as needed to establish the required 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 directly or via other components connected and fixed to the second plate 22 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 parallel plate capacitor therebetween. 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, snap-fit, etc., or indirectly connected and fixed to the second plate 22 via other structures connected to it (such as the base 40, mounting post, coupling rib 50, etc.). Among them, the resonant rod 30 can be a metal resonant rod, a ceramic dielectric resonant rod, or a dielectric resonant rod made 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, an irregularly shaped rod, a sheet resonant rod, a sheet metal resonant rod, or other resonant rods of other shapes, etc.

[0103] The filter also includes a capacitive coupling component 10, which can be any of the capacitive coupling components 10 described in the above embodiments of this application. The capacitive coupling component 10 can be disposed between any two resonant rods 30 to enable capacitive coupling between the two resonant rods 30.

[0104] By adopting the above scheme, the filter can construct a capacitive coupling relationship and optimize the capacitive coupling effect by applying the capacitive coupling component 10 provided in the embodiments of this application, thereby improving the reliability, consistency, quality and yield of the filter, and reducing the failure rate and debugging cost of the filter.

[0105] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A capacitive coupling assembly disposed within a filter housing, the filter housing having a first plate and a second plate disposed opposite to each other, characterized in that, The capacitive coupling component includes: The medium cylinder is erected between the first plate and the second plate; Mounting component, movably mounted to the first plate; A coupling element is disposed inside the medium cylinder and is not grounded. The coupling element is connected to the mounting element and can move under the drive of the mounting element to adjust the capacitive coupling amount.

2. The capacitive coupling component as described in claim 1, characterized in that, The capacitive coupling assembly includes an insulating plate, the insulating plate being sealed at the bottom and connected to the opening of the medium cylinder away from the first plate.

3. The capacitive coupling component as described in claim 2, characterized in that, The insulating plate and the dielectric cylinder are an integrated structure.

4. The capacitive coupling component as described in claim 1, characterized in that, The mounting component is an insulating component.

5. The capacitive coupling component as described in claim 1, characterized in that, The coupling element is a rod-shaped structure. A cut-off groove is formed on the end face of the coupling element away from the mounting element. The cut-off groove is arranged radially through the coupling element and extends axially along the coupling element. The extension length of the cut-off groove along the axial direction of the coupling element is less than the length of the coupling element.

6. The capacitive coupling component as described in any one of claims 1-5, characterized in that, The coupling element is fixedly connected to the mounting element, so that the coupling element moves synchronously with the mounting element.

7. The capacitive coupling component as described in claim 6, characterized in that, The coupling element rotates circumferentially and moves axially with the mounting element.

8. The capacitive coupling component as described in claim 7, characterized in that, The mounting component is a screw, and the capacitive coupling assembly includes a nut. The end of the mounting component away from the coupling component passes through the first plate and is threadedly connected to the nut.

9. The capacitive coupling component as described in any one of claims 1-5, characterized in that, The opposite ends of the medium cylinder abut against the first plate and the second plate, respectively; And / or, the medium cylinder is a cuboid with a circular hole in the middle.

10. A filter, characterized in that, It includes a filter housing and a capacitive coupling assembly as described in any one of claims 1-9.

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