A convex cavity three-mode resonant structure and a filter containing the resonant structure

Abstract

The patent of the present invention discloses a convex cavity multi-mode resonant structure and a filter containing the resonant structure, including a cavity and a cover plate, a dielectric resonator block and a dielectric support frame are arranged in the cavity, the cavity and / or At least one end surface of the dielectric resonator block is convex, and the dielectric resonator block and the dielectric support frame form a three-mode dielectric resonator rod, similar to one end or any end of the cube dielectric resonator block being connected to the dielectric support frame, and the dielectric support frame is connected to the inner wall of the cavity. The dielectric resonance block forms a three-mode resonance in the three directions of the X, Y, and Z axes of the cavity. The use of the cavity filter of the present invention can ensure a high Q value at a small distance between the resonant rod and the cavity, increase the tuning range of the tuning screw, and reduce the impact of the small distance between the cavity and the dielectric resonator block. The sensitivity of the resonant frequency facilitates production debugging and reduces production costs.

Description

technical field [0001] The invention relates to base station filters, antenna feeder filters, combiners and anti-interference filters used in the field of wireless communication. The types of filters can be band-pass, band-stop, high-pass and low-pass. The convex cavity three-mode resonant structure and the filter containing the convex cavity three-mode resonant structure. Background technique [0002] With the rapid development of the fourth-generation mobile communication to the fifth-generation mobile communication, the requirements for miniaturization and high performance of communication equipment are getting higher and higher. Traditional filters are gradually replaced by single-mode dielectric filters due to their large metal cavity and general performance. Single-mode dielectric filters mainly include TE01-mode dielectric filters and TM-mode dielectric filters, TE01-mode dielectric filters and TM-mode dielectric filters. Mode dielectric filters generally use single-...

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Problems solved by technology

However, this structure has the following technical problems: 1. Because the distance between the dielectric resonator block and the inner wall of the cavity is extremely small, the adjustment range of the tuning screw is limited, which is not conducive to the installation and debugging of the dielectric resonator block; The distance between the inner walls of the cavity is extremely small, so the distance between the dielectric resonator block and the cavity is highly sensitive to the resonance frequency of the single cavity, which is not conducive to the mass production of the dielectric resonator block; 3. Because the distance between the dielectric resonator block and the inner wall of the cavity The small spacing is highly sensitive to the resonance frequency of a single cavity, so the design accuracy of the dielectric resonator block and the cavity is extremely high, which increases the manufacturing cost

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