Coupling adjustment structure and filter

Abstract

The utility model provides a coupling adjusting structure, which comprises a plurality of resonators, a plurality of medium supporting seats, a plurality of coupling screw rods and a cover plate, the resonators are fixedly connected to form a resonant array, and resonant cavities in the adjacent resonators are communicated with each other, so that corresponding coupling windows are formed at critical positions of the adjacent resonators; each medium supporting seat is embedded into the coupling window, and one side, close to the cover plate, of each medium supporting seat is recessed to form a coupling window hole; and each coupling screw rod passes through the cover plate and enters the coupling window hole, so that the cover plate is fixed on each resonant array. According to the utility model, the medium supporting seat is embedded into the coupling window, so that chips generated after the coupling screw rotates all fall into the coupling window hole, and the chips are prevented from falling into the resonant cavity to influence the resonance effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and particularly relates to a coupling adjustment structure and a filter. Background Technique

[0002] In the prior art, a metal coaxial filter is a common filtering device, which is usually composed of components such as a cavity, a cover plate, a frequency screw, a coupling screw, a resonance platform, a resonance rod, a coupling screw, and a window. In order to obtain specific filtering performance, it is necessary to adjust the lengths of the frequency screw and the coupling screw below the cover plate. Currently, the common way to achieve this adjustment is to rely on the mutual cooperation of the screw and the threaded hole. However, there is a problem that cannot be ignored in this cooperation method, that is, metal debris is inevitably generated during the operation. Once these metal debris enter the resonance cavity, they will seriously affect the intermodulation index and intermodulation stability of the filter. For example, in the communication field, the intermodulation index and stability of the filter are directly related to the quality and reliability of signal transmission. The presence of metal debris may cause signal distortion, increased interference, and even affect the normal operation of the entire communication system. Content of the Utility Model

[0003] In order to solve the problem that the metal debris generated after the operation of the screws for adjusting the frequency and coupling in the background technique will seriously affect the intermodulation index and intermodulation stability of the filter, the utility model proposes the following technical solutions:

[0004] A coupling adjustment structure includes: a plurality of resonators, a plurality of dielectric support seats, a plurality of coupling screws, and a cover plate; each resonator is fixedly connected to form a resonance array, and the resonance cavities in adjacent resonators communicate with each other, so as to form corresponding coupling windows at the critical positions of adjacent resonators; each dielectric support seat is embedded in the coupling window, and a coupling window hole is recessed on one side of each dielectric support seat close to the cover plate; each coupling screw passes through the cover plate and enters the coupling window hole, so as to fix the cover plate on each resonance array.

[0005] Wherein, one of the side walls of each resonator at the critical position is open, and the openings of adjacent resonators are fixedly connected to form the coupling window.

[0006] Further, limiting blocks for limiting the dielectric support seats are formed on the side walls of each coupling window in the resonance array.

[0007] Further, the surface of each dielectric support seat close to the cover plate protrudes to form a central ring coaxial with the coupling through hole.

[0008] Further, both sides of each of the medium support seats are recessed to form a limiting groove that matches the limiting block.

[0009] Further, a coupling gap is provided between each of the resonators in the resonance array.

[0010] Further, the number of the medium support seats is less than the number of the coupling windows.

[0011] Another object of the present invention is to provide a filter including the above-mentioned coupling adjustment structure.

[0012] Beneficial effects: In the present invention, by embedding the medium support seat into the coupling window, the debris generated after the rotation of the coupling screw falls into the coupling window hole, thereby preventing the debris from falling into the resonance cavity and affecting the resonance effect. Description of the Drawings

[0013] Figure 1 FIG. is a partial exploded structural schematic diagram of a coupling adjustment structure according to an embodiment of the present invention;

[0014] Figure 2 FIG. is a perspective structural schematic diagram of a coupling adjustment structure according to another embodiment of the present invention. Detailed Embodiments

[0015] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present invention will be described in further detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] It should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of this patent.

[0017] Figure 1 FIG. is a partial exploded structural schematic diagram of a coupling adjustment structure according to an embodiment of the present invention. Figure 2 FIG. is a perspective structural schematic diagram of a coupling adjustment structure according to another embodiment of the present invention.

[0018] Refer to together Figure 1 and Figure 2, A coupling adjustment structure according to an embodiment of the present utility model includes: a plurality of resonators 1, a plurality of dielectric support seats 2, a plurality of coupling screws 3, and a cover plate 4. Each resonator 1 is fixedly connected to form a resonator array 5. The resonant cavities 11 in adjacent resonators 1 communicate with each other, so as to form corresponding coupling windows 13 at the critical positions between adjacent resonators 1. Each dielectric support seat 2 is embedded in the coupling window 13, and a coupling window hole 21 is recessed on one side of each dielectric support seat 2 close to the cover plate 4. Each coupling screw 3 passes through the cover plate 4 and enters the coupling window hole 21, so as to fix the cover plate 4 on each resonator array 5.

[0019] Specifically, the shapes and structures of each resonator 1 are the same. In this embodiment, the whole of each resonator 1 is in a hexagonal shape, and a resonant cavity 11 for installing a resonant column 14 and a tuning rod 15 is provided in each resonator 1. In the resonator array 5, the bottoms of each resonator 1 are fixedly connected into a whole. One of the side walls of each resonator 1 at the critical position is open. After each resonator 1 is fixedly connected to form a resonator array 5, the openings between adjacent resonators 1 are fixedly connected, so as to form the above-mentioned coupling window 13. Among them, the side walls of each coupling window 13 are composed of the openings of adjacent resonators 1, so as to form a limiting block 13 for limiting the dielectric support seat 2. There is a coupling gap 6 between each resonator 1, and a part of the coupling gap 6 between the coupled resonators 1 is blocked by the coupling window 13.

[0020] Furthermore, the structures of each dielectric support seat 2 are the same, and the opposite sides of each dielectric support seat 2 are respectively recessed, so as to form a limiting groove 23 matching the limiting block 13. The number of dielectric support seats 2 is less than the number of coupling windows 13. When installing the dielectric support seats 2, the key cavities (the cavities that play a crucial and decisive role in aspects such as resonant characteristics, energy storage and transmission, and mode formation) in the resonant cavities 11 in the resonator array 5 are selected for setting. After simulation, according to the performance requirements of the filter and the simulation results, the positions of the coupling windows 13 in the specific key cavities are selected to set the corresponding dielectric support seats 2. When the number of resonators 1 is small, the dielectric support seats 2 can also be installed in all the coupling windows 13. During the simulation process, the working frequency of each resonator 1 is adjusted by turning the tuning rod, and the coupling degree between adjacent resonators 1 is adjusted by turning the coupling screw 3.

[0021] Preferably, a dielectric support base 2 is provided in each coupling window 13 to ensure the intermodulation performance of the entire filter. However, in actual application, this will undoubtedly greatly increase the production cost. Due to the different installation positions of each resonator 11, the degree of influence of each resonator 11 on the intermodulation performance of the entire filter also varies. The resonator 11 that has a greater impact on the intermodulation performance of the entire filter is called the key cavity, and the cavity that has a smaller impact on the intermodulation performance of the entire filter is called the non-key cavity. In this embodiment, the key cavities are all provided with dielectric support bases 2 that block each coupling window 13, so as to prevent debris that may exist in the non-key cavities from entering the key cavities.

[0022] Furthermore, one end of each dielectric support base 2 close to the cover plate 4 protrudes to form a central ring coaxial with the coupling window hole 21. The diameter of the inner ring of the central ring is slightly larger than the diameter of the coupling window hole 21. When the cover plate 4 is fixed on the resonator array 5 through the coupling screw 3, the end face of each central ring abuts against the cover plate 4, so as to ensure that the debris generated when the coupling screw 3 rotates will not enter the corresponding resonator 11. Among them, the height of the central ring (i.e., the axial length) is set according to the compression amount of the material of the dielectric support base 2.

[0023] Another object of the present invention is to propose a filter including the above coupling adjustment structure.

[0024] In summary, the present invention embeds the dielectric support base into the coupling window, so that the debris generated after the coupling screw rotates all falls into the coupling window hole, thereby preventing debris from falling into the resonator cavity and affecting the resonance effect.

[0025] The specific embodiments of the utility model are described above. Other embodiments are within the scope of the appended claims.

[0026] The terms "exemplary", "example" and the like used throughout this specification mean "serving as an example, instance or illustration", and do not mean "preferred" or "advantageous" over other embodiments. For the purpose of providing an understanding of the described technology, the specific embodiments include specific details. However, these technologies can be implemented without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described embodiments.

[0027] The optional embodiments of the embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0028] The foregoing description of the content of this specification is provided to enable any person of ordinary skill in the art to make or use the content of this specification. Various modifications to the content of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein can be applied to other variations without departing from the scope of protection of the content of this specification. Therefore, the content of this specification is not limited to the examples and designs described herein, but is consistent with the broadest scope that conforms to the principles and novel features disclosed herein.

Claims

1. A coupling adjustment structure, characterized in that: include: A plurality of resonators (1), a plurality of dielectric support seats (2), a plurality of coupling screws (3) and a cover plate (4); each resonator (1) is fixedly connected to each other to form a resonance array (5), and the resonance cavities (11) in adjacent resonators (1) are interconnected, thereby forming corresponding coupling windows (12) at the critical points of adjacent resonators (1); each dielectric support seat (2) is embedded in the coupling window (12), and a side of each dielectric support seat (2) close to the cover plate (4) is recessed to form a coupling window hole (21); each coupling screw (3) passes through the cover plate (4) and enters the coupling window hole (21), thereby fixing the cover plate (4) on each resonance array (5).

2. A coupling adjustment structure according to claim 1, characterized in that: One of the side walls of each resonator (1) located at the critical position is opened, and the openings of adjacent resonators (1) are fixedly connected, thereby forming the coupling window (12).

3. A coupling adjustment structure according to claim 2, characterized in that: The side wall of each coupling window (12) in the resonance array (5) forms a limiting block (13) for limiting the dielectric support seat (2).

4. A coupling adjustment structure according to claim 2, characterized in that: Each medium support seat (2) is protruded near the surface of the cover plate (4) to form a center ring (22) coaxial with the coupling window hole (21).

5. A coupling adjustment structure according to claim 3, characterized in that: Both sides of each medium support seat (2) are recessed, thereby forming a limiting groove (23) matching the limiting block (13).

6. A coupling adjustment structure according to claim 2, characterized in that: A coupling gap (6) is provided between each of the resonators (1) in the resonance array (5).

7. A coupling adjustment structure according to claim 5, characterized in that: The number of the medium support seats (2) is less than the number of the coupling windows (12).

8. A filter, characterized in that: It comprises a coupling adjustment structure as described in any one of claims 1 to 7.

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