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CN-121484403-B - High-power-resistant miniaturized ceramic dielectric filter

CN121484403BCN 121484403 BCN121484403 BCN 121484403BCN-121484403-B

Abstract

The application relates to the technical field of electronic filtering, in particular to a high-power-resistant miniaturized ceramic dielectric filter which comprises a ceramic cover plate, a cavity, an insulating sleeve, inner conductor pieces and connectors, wherein the ceramic cover plate is provided with silver coatings and is connected to the top of the cavity in a sealing manner, two symmetrical sides of the cavity are respectively provided with an interface penetrating through the side wall of the cavity, the insulating sleeve is provided with two interfaces in the cavity and corresponds to the interfaces one by one, the inner conductor pieces are arranged in the insulating sleeve, the connectors penetrate into the interfaces, and the end parts of the connectors are connected with the inner conductor pieces. The application has the advantages of improving the transmission efficiency of the product, reducing the loss, reducing the heat dissipation capacity and prolonging the service life of the product, and the insulating medium completely wraps the inner conductor, so that the service power of the filter is effectively improved, and compared with the conventional ceramic dielectric filter with the range of several watts to tens of watts, the ceramic dielectric filter can process high-current and high-frequency signals, and has wider application scene.

Inventors

  • GUO ZHAO
  • SONG JING
  • WANG YIFAN
  • ZHANG ZHIKUN
  • ZHAO MENG
  • ZHAO WUZHOU

Assignees

  • 陕西索飞电子科技有限公司

Dates

Publication Date
20260505
Application Date
20260105

Claims (6)

  1. 1. The high-power-resistant miniaturized ceramic dielectric filter is characterized by comprising a ceramic cover plate (1), a cavity (2), an insulating sleeve (3), an inner conductor sheet (4) and a connector (5); the ceramic cover plate (1) is provided with a silver coating, and the ceramic cover plate (1) is connected to the top of the cavity (2) in a sealing manner; two symmetrical sides of the cavity (2) are respectively provided with an interface (21) penetrating through the side wall of the cavity (2); The insulation sleeve (3) is arranged in the cavity (2) and corresponds to the interfaces (21) one by one respectively, the inner conductor plates (4) are arranged in the insulation sleeve (3), the insulation sleeve (3) comprises an insulation base (31) and an insulation pressing block (32), a placement groove (311) is formed in the insulation base (31), the lower end of the inner conductor plate (4) is inserted into the placement groove (311), a groove (321) is formed in one side, facing the inner conductor plate (4), of the insulation pressing block (32), the upper ends of the inner conductor plates (4) extend into the groove (321), and the bottom surface of the insulation pressing block (32) is attached to the upper surface of the insulation base (31); the connector (5) penetrates into the interface (21), and the end of the connector (5) is connected with the inner conductor sheet (4); The inner conductor sheet (4) comprises an upper part and a lower part, wherein the lower part is a transverse sheet (41) which is transversely arranged, the upper part is a vertical sheet (42) which is vertically arranged, the transverse sheet (41) is connected with the vertical sheet (42) to form an L shape, the transverse sheet (41) is inserted into the mounting groove (311), and the vertical sheet (42) is inserted into the groove (321); The transverse sheet (41) is provided with a connecting hole (411), the side wall of the mounting groove (311) is provided with a perforation (312) concentric with the connecting hole (411), the end part of the connector (5) is provided with a first flange (51), and the first flange (51) penetrates through the perforation (312) and is clamped into the connecting hole (411) so that the connector (5) is connected with the inner conductor sheet (4).
  2. 2. The high-power-resistant miniaturized ceramic dielectric filter according to claim 1, wherein a second flange (421) is arranged at the top of the vertical piece (42), a through hole (322) for the second flange (421) to pass through is arranged at the bottom of the groove (321) of the insulating pressing block (32), a coupling groove (11) is arranged at the bottom of the ceramic cover plate (1) corresponding to the position of the through hole (322), and the second flange (421) passes through the through hole (322) and stretches into the coupling groove (11).
  3. 3. The high-power-resistant miniaturized ceramic dielectric filter according to claim 1, wherein a sealing groove (323) is formed in the upper end of the insulating pressing block (32), a sealing ring (6) is arranged in the sealing groove (323), and when the ceramic cover plate (1) is connected to the top of the cavity (2) in a sealing manner, the sealing ring (6) is compressed between the insulating pressing block (32) and the ceramic cover plate (1) to achieve sealing.
  4. 4. A miniaturized ceramic dielectric filter resistant to high powers according to claim 1, characterized in that the silver coating of the ceramic cover plate (1) surface has a non-uniform thickness distribution.
  5. 5. A miniaturized ceramic dielectric filter resistant to high powers according to claim 1, characterized in that said inner conductor sheet (4) is made of brass and is covered over its entire surface with an electroplated silver layer of uniform thickness.
  6. 6. The high-power-resistant miniaturized ceramic dielectric filter according to claim 1, wherein a connecting flange (52) is arranged on the connector (5), the interface (21) is correspondingly provided with an internal thread groove (211), and a screw (53) penetrates through the connecting flange (52) and is in threaded connection with the internal thread groove (211), so that the connector (5) is detachably connected with the interface (21).

Description

High-power-resistant miniaturized ceramic dielectric filter Technical Field The application relates to the technical field of electronic filtering, in particular to a high-power-resistant miniaturized ceramic dielectric filter. Background A filter is an electronic device that functions to filter signals in a circuit, i.e., remove or attenuate signals in certain frequency ranges, while preserving or enhancing signals in other frequency ranges. Filters are commonly used in electronic devices to remove noise, interference, clutter, etc., thereby improving signal quality and stability. Along with the rapid development of the modern process, the demands of society on electronic products are increasing, and for the convenience of installation, modern filter products are always developed along the directions of light weight, miniaturization, high performance and the like. When the electromagnetic wave propagates in the material with high dielectric constant, the wavelength of the electromagnetic wave can be shortened to be short relative to the air medium, so that the miniaturization design of the filter is realized. Therefore, the ceramic material with the characteristics of low loss, high dielectric constant, small frequency temperature coefficient, small thermal expansion coefficient, high power bearing capacity and the like is widely favored by research and development personnel and is often selected as the first-choice dielectric material of the miniaturized filter. In the conventional filter design, various means are often adopted to achieve miniaturization and meet certain electrical performance requirements. For miniaturized design, a part of the design can be made of traditional materials such as Teflon and the like as a medium, and the volume is reduced by optimizing the structural layout. In terms of adjusting electrical properties, special structural members are arranged to respectively adjust indexes such as standing waves, insertion loss and the like. In terms of material selection, common metal and insulating materials can be selected for the filter cavity, the inner conductor sheet, the insulating medium and the like so as to ensure basic electrical performance and mechanical performance. In the assembly welding process, a conventional high-temperature welding mode is generally adopted. Structurally, there is no special sealing structure to isolate the air in the cavity from the air in the conductor plate in the input port. When the traditional filter is designed in a miniaturized way, the power of the traditional filter is usually in a lower range, and the traditional filter cannot meet the requirement of the existing market on high-power electric performance. The power limitation makes the traditional filter perform poorly when processing high-current and high-frequency signals, and the application scene is limited greatly. Disclosure of Invention In order to realize miniaturization of the filter and increase high-power resistance performance, the application provides a high-power-resistant miniaturized ceramic dielectric filter, which adopts the following technical scheme: The insulation sleeve comprises a ceramic cover plate, a cavity, an insulation sleeve, an inner conductor piece and a connector; the ceramic cover plate is provided with a silver plating layer and is connected to the top of the cavity in a sealing manner; Two symmetrical sides of the cavity are respectively provided with an interface penetrating through the side wall of the cavity; The two insulating sleeve parts are arranged in the cavity and respectively correspond to the interfaces one by one; the inner conductor sheet is arranged in the insulation sleeve; The connector is threaded into the interface and the connector end is connected with the inner conductor tab. By adopting the technical scheme, the ceramic is used as a cover plate material and is provided with the silver coating, so that excellent heat dissipation performance and low dielectric loss are realized, high power can be endured, meanwhile, the insulation sleeve, the cavity and the inner conductor sheet are combined, so that the inner conductor sheet can be effectively fixed and insulated and is reliably connected with a penetrating connector, the high-integration and modularized structure omits complicated coaxial conversion and welding steps of the traditional filter, the whole volume is obviously reduced, and the miniaturization is realized. Optionally, the insulation external member includes insulation base and insulation briquetting, inside the arranging groove that is equipped with of insulation base, the lower extreme of inner conductor piece inserts in the arranging groove, insulation briquetting orientation one side of inner conductor piece is equipped with the recess, the upper end of inner conductor piece stretches into in the recess, the bottom surface of insulation briquetting and the laminating of insulation base's upper surface. By adopting the t