A dielectric fine tuning low intermodulation filter

Abstract

This utility model discloses a dielectric fine-tuning low intermodulation filter, relating to the field of filter technology. It includes a filter base, a filter cover plate, multiple tuning screws, and multiple dielectric screws. The filter cover plate is fixedly connected to the filter base, forming a filter cavity between the filter cover plate and the filter base. Multiple tuning screws are fixedly connected to the filter cover plate. Each dielectric screw corresponds to a tuning screw and is threadedly connected to the filter base. This dielectric fine-tuning low intermodulation filter features a monolithically machined cover plate that effectively reduces the impact on the product's intermodulation performance, greatly improving the product's intermodulation pass rate and stability. The monolithically machined cover plate also exhibits high consistency, reducing assembly steps and significantly improving assembly and debugging efficiency, thereby increasing production capacity.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a dielectric fine-tuning low intermodulation filter. Background Technology

[0002] With the development of mobile communication technology, the requirements for the intermodulation performance of combiners and filters are becoming increasingly stringent. Furthermore, with the increase in demand, higher requirements are being placed on production efficiency and processes in order to improve the intermodulation pass rate and stability during the production process.

[0003] Traditional filters use a metal tuning screw that goes through a cover plate, and the frequency is adjusted by the depth of the screw. During the process, metal shavings and foreign objects are easily generated, and the tightening force of the screw can affect the intermodulation performance of the product. Utility Model Content

[0004] The purpose of this invention is to provide a dielectric fine-tuning low intermodulation filter to address the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dielectric fine-tuning low intermodulation filter, comprising a filter base, a filter cover plate, multiple tuning screws, and multiple dielectric screws; the filter cover plate is fixedly connected to the filter base, and a filter cavity is formed between the filter cover plate and the filter base; multiple tuning screws are fixedly connected to the filter cover plate; the multiple dielectric screws correspond one-to-one with each tuning screw and are threadedly rotatably connected to the filter base.

[0006] Preferably, the filter cover and multiple tuning screws are integrally machined into one piece.

[0007] Preferably, each medium screw includes a rod body and a threaded head, and the rod body has a cavity that mates with the corresponding tuning screw.

[0008] Preferably, the filter base has multiple media passages for each media screw to pass through in a corresponding manner, and the media passages have internal threads that connect with the external threads of the threaded heads.

[0009] Preferably, the filter base is fixedly connected to a plurality of connectors, each of which is electrically connected to an external power device via a cable.

[0010] Preferably, the filter base is fixedly connected to multiple isolation sections, and each isolation section is located inside the filter cavity. The height of the isolation section is the same as the height of the filter cavity, and the isolation section divides the filter cavity into multiple hollow cavities.

[0011] Preferably, the filter base and the filter cover are fixedly connected by a plurality of first mounting bolts.

[0012] In the above technical solution, the dielectric fine-tuning low intermodulation filter provided by this utility model has an integrally machined cover plate that can effectively reduce the impact on the intermodulation performance of the product, greatly improve the intermodulation qualification rate and stability of the product; the integrally machined cover plate has strong consistency, and at the same time reduces the product assembly process, greatly improves the product assembly and debugging efficiency, and increases production capacity. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0015] Figure 2 A split view of the filter cover and filter base provided in an embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the filter cover structure provided in an embodiment of the present utility model;

[0017] Figure 4 A schematic diagram of the filter base structure provided in this embodiment of the utility model;

[0018] Figure 5 The separation of the filter base and dielectric screw provided in this embodiment of the utility model Figure I ;

[0019] Figure 6 The separation of the filter base and dielectric screw provided in this embodiment of the utility model Figure II .

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Filter base; 2. Filter cover; 3. Filter cavity; 4. Tuning screw; 5. Dielectric screw; 6. Rod body; 7. Threaded head; 8. Cavity; 9. Dielectric channel; 10. Connector; 11. Cable; 12. Isolation part; 13. First mounting bolt. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-6This utility model provides a dielectric fine-tuning low intermodulation filter, including a filter base 1, a filter cover plate 2, multiple tuning screws 4, and multiple dielectric screws 5. The filter cover plate 2 is fixedly connected to the filter base 1, forming a filter cavity 3 between the filter cover plate 2 and the filter base 1. The multiple tuning screws 4 are fixedly connected to the filter cover plate 2. The multiple dielectric screws 5 correspond one-to-one with each tuning screw 4 and are threadedly rotatably connected to the filter base 1. It should be noted that the filter cover plate 2 and the multiple tuning screws 4 are integrally machined. Specifically, this eliminates the loosening or relative displacement that may occur due to vibration and temperature changes in traditional separate screws, ensuring long-term stability of the tuning state. At the same time, it also reduces errors and inconsistencies caused by assembling multiple parts, improving product consistency and reliability.

[0024] Each medium screw 5 includes a rod body 6 and a threaded head 7, and the rod body 6 has a cavity 8 that mates with the corresponding tuning screw 4.

[0025] The filter base 1 has multiple media passages 9 through which each media screw 5 passes. Each media passage 9 has an internal thread that connects to the external thread of the threaded head 7. Furthermore, each threaded head 7 has a slotted groove, facilitating adjustment of each media screw 5 by operators. This allows for indirect yet precise adjustment. This simplifies the operation of adjusting the media screws 5, which are deeply embedded within the cavity, from the outside, and improves production and debugging efficiency.

[0026] The filter base 1 is fixedly connected to multiple connectors 10, and each connector 10 is electrically connected to an external power device via a cable 11.

[0027] The filter base 1 is fixedly connected to multiple isolation sections 12, each located within the filter cavity 3. The height of each isolation section 12 is equal to the height of the filter cavity 3, dividing the filter cavity 3 into multiple hollow cavities 8. Specifically, this improves the out-of-band rejection characteristics of the filter and enhances its overall filtering performance.

[0028] The filter base 1 and the filter cover 2 are fixedly connected by multiple first mounting bolts 13. Specifically, first threaded holes are provided on the top of the filter base 1 and the top of each isolation part 12, and second threaded holes are provided on the filter cover 2 corresponding to each of the first threaded holes. The first mounting bolts 13 are screwed into the second threaded holes and the first threaded holes respectively. This ensures that each dielectric screw 5 can be firmly and accurately installed and positioned in the preset position, preventing it from shifting during use, thereby ensuring the accuracy and repeatability of the tuning results. Stable installation also helps maintain stable electrical performance.

[0029] Specifically, the integrally machined cover plate can effectively reduce the impact on product interoperability, greatly improving the product interoperability qualification rate and stability; the integrally machined cover plate has strong consistency, and at the same time reduces the product assembly process, greatly improving the product assembly and debugging efficiency and increasing production capacity.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dielectric-tuned low intermodulation filter, characterized in that, include: Filter base (1); The filter cover (2) is fixedly connected to the filter base (1), and a filter cavity (3) is formed between the filter cover (2) and the filter base (1). Multiple tuning screws (4) are fixedly connected to the filter cover plate (2); Multiple dielectric screws (5) correspond one-to-one with each tuning screw (4) and are threadedly connected to the filter base (1).

2. The dielectric fine-tuning low intermodulation filter according to claim 1, characterized in that, The filter cover (2) and multiple tuning screws (4) are integrally machined and formed.

3. The dielectric fine-tuning low intermodulation filter according to claim 1, characterized in that, Each medium screw (5) includes a rod body (6) and a threaded head (7), and the rod body (6) has a cavity (8) that connects with the corresponding tuning screw (4).

4. A dielectric fine-tuning low intermodulation filter according to claim 2, characterized in that, The filter base (1) has multiple media passages (9) for each media screw (5) to pass through in a corresponding manner. The media passages (9) have internal threads that are threaded to the external threads of the thread head (7).

5. A dielectric-tuned low intermodulation filter according to claim 1, characterized in that, The filter base (1) is fixedly connected to a plurality of connectors (10), each of which is electrically connected to an external power device via a cable (11).

6. A dielectric-tuned low intermodulation filter according to claim 1, characterized in that, Multiple isolation sections (12) are fixedly connected to the filter base (1), and each isolation section (12) is located inside the filter cavity (3). The height of the isolation section (12) is the same as the height of the filter cavity (3). The isolation section (12) divides the filter cavity (3) into multiple hollow cavities (8).

7. A dielectric-tuned low intermodulation filter according to claim 1, characterized in that, The filter base (1) and the filter cover (2) are fixedly connected by a plurality of first mounting bolts (13).

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