Dielectric waveguide filter

Abstract

The invention discloses a dielectric waveguide filter. The dielectric waveguide filter comprises a plurality of dielectric single cavities which are connected with each other, wherein the dielectric single cavities are solid cavities made of the dielectric material; electromagnetic shielding layers are arranged on the surfaces of the solid cavities. According to the dielectric waveguide filter disclosed by the invention, cavities, namely air parts, of a conventional metal cavity waveguide filter are filled with the dielectric material according to different dielectric constants of the air and medium, and the electromagnetic shielding layer is arranged on the surface of the dielectric material to carry out electromagnetic shielding; meanwhile, the dielectric material is used for supporting, so that the designed dielectric waveguide filter has advantages of being small in size, light in weight, low in cost, having an environment-friendly effect and the like, and can satisfy development trends such as small size, light weight, low cost, high performance and environmental protection of products such as future filters, duplexers and multiplexers.

Description

technical field [0001] The invention relates to the technical field of electrical components used in the communication industry, in particular to a dielectric waveguide filter. Background technique [0002] In communication systems, waveguide filters are usually used to filter out interference signals or clutter signals within a specific frequency range. The traditional waveguide filter structure is a metal cavity structure, that is, precious materials such as metal or metal alloys (such as: aluminum, magnesium alloy, etc.) are used to hollow out the middle or part, and the metal materials mainly play the role of electromagnetic shielding and structural support. Although the filter designed in this way has a high Q value, its volume and weight are large, which is not conducive to installation, disassembly and transportation; and due to the high price of precious metals, the cost of the waveguide filter is also high. [0003] In addition, the tuning structure of the dielectr...

AI Technical Summary

Problems solved by technology

Although the filter designed in this way has a high Q value, its volume and weight are large, which is not conducive to installation, disassembly and transportation; and due to the high price of precious metals, the cost of waveguide filters is also high

[0003] In addition, the tuning structure of the dielectric waveguide filter in the prior art generally plays the role of frequency tuning by removing a small part of the dielectric material on the width of the single cavity of the dielectric. Such a filter tuning structure limits the cavity-walking form of the filter. Conducive to the diversification and adaptability of filter structure design

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