Dielectric resonator and assembly method thereof

Abstract

The invention relates to a dielectric resonator and an assembly method thereof. The dielectric resonator includes a metal cavity, dielectric resonant posts located in the metal cavity and a metal cover plate mounted to an open end of the metal cavity. Mounting grooves are arranged in the top surface of the metal cover plate and corresponding to the dielectric resonant posts. A pressing piece is formed between the bottom of each mounting groove and the bottom surface of the metal cover plate. The pressing pieces and upper end faces of the dielectric resonant posts are in contact and first elastic deformations acting on the upper end faces of the dielectric resonant posts are generated therebetween. The mounting grooves are equipped with clamp nut posts. Second elastic deformations acting on the upper end faces of the dielectric resonant posts are generated between the clamp nut posts and the pressing pieces. The dielectric resonant posts are pressed and fixed into the metal cavity through the combined action of the first and second elastic deformations. According to the invention, good contact of the dielectric resonant posts with the metal cavity and the metal cover plate can be ensured without fixing the upper and lower end faces of the dielectric resonant posts by welding, the fixation is reliable, the assembly is simple and batch production is facilitated.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of radio frequency communication, in particular to a dielectric resonator and an assembly method thereof. [0003] 【Background technique】 [0004] With the continuous progress and development of communication technology, the filter is a key module in the field of microwave radio frequency, and people have higher and higher requirements for its performance. It requires lower insertion loss, smaller volume and lower manufacturing cost. lower. Due to its high Q value, small temperature drift coefficient and small volume, dielectric resonators have attracted more and more attention, and have been more and more widely used in the field of microwave radio frequency. [0005] According to the working principle of the dielectric resonator, there is a high electric field distribution at the contact part between the lower end surface of the dielectric resonant column and the metal cavity, and the contact part...

AI Technical Summary

Problems solved by technology

These two assembly methods require heating and welding, which can easily cause the silver plating inside the metal cavity to turn yellow, oxidize or even fall off, and the assembly is difficult, the assembly efficiency is low, and it is difficult to dismantle and rework, which is not conducive to mass production operations.

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