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

Abstract

The patent of the present invention discloses a concave 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 face of the dielectric resonator block is concave, 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 connected to the dielectric support frame, and the dielectric support frame is connected to the inner wall of the cavity. The dielectric resonance block and the dielectric support frame form a three-mode resonance in the three directions of the X, Y, and Z axes of the cavity. Using the cavity multimode 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 small distance between the cavity and the dielectric resonator block Sensitivity to resonance frequency facilitates production debugging and reduces production costs.

Description

technical field [0001] The invention relates to a base station filter, an antenna feeder filter, a combiner, an anti-interference filter, etc. used in the field of wireless communication. A concave cavity three-mode resonant structure and a filter containing the resonant structure. Background technique [0002] With the rapid development of the fourth generation mobile communication to the fifth generation mobile communication, the requirements for the 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. The mode dielectric filter generally adopts the single-mode dielectric resonance method. Although this resonance method can improve a ...

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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 wall 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 a single mode, which is not conducive to the mass production of the dielectric resonator block; 3. Because the pole 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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