A cavity filter

Abstract

The invention discloses a cavity filter, which includes a cavity, a plurality of installation chambers are arranged on one side of the cavity, and a resonant rod is installed in each installation cavity, and the cavity is close to a plurality of installation chambers. The top side of the installation chamber is sealed and covered with a cover plate, and the top of the cover plate is fixedly installed with multiple fixing seats, and the bottom of the fixing seats is fixedly connected with an adjustment cylinder, and the adjustment cylinders all pass through the cover plate, In addition, tuning rods are connected to the bottom side of the cover plate, and the tuning rods are in one-to-one correspondence with the resonant rods. This kind of cavity filter has simple and reasonable structure, novel design, simple operation, and effectively solves the traditional cavity filter assembly and debugging mechanism's heavy workload, difficulty in fine-tuning, heavy debugging workload, many man-hours, and high difficulty in debugging. , The technical problem of high requirements for debugging personnel and high manufacturing cost has high popularization and use value.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a cavity filter. Background technique [0002] Filters are key equipment in modern mobile communication systems and are widely used in wireless communication base stations. The cavity filter is a microwave filter with a resonant cavity structure. A cavity can be equivalent to an inductor connected in parallel with a capacitor, thereby forming a resonant stage and realizing the microwave filtering function. Because the cavity filter has the advantages of firm structure, wide frequency band, far high-end parasitic passband, small size, moderate Q value, flat amplitude-frequency characteristics in the band, stable performance, and good heat dissipation performance, it is widely used in major communication base stations Front-end filtering to filter out strong interference signals out of band. [0003] Existing cavity filters need to be debugged to achieve the designed performance ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the traditional cavity filter assembly and debugging process, there are often problems such as heavy workload of the assembly and debugging mechanism, difficulty in fine-tuning, heavy debugging workload, long debugging time, high difficulty in debugging, high requirements for debugging personnel and high manufacturing costs. Problem, the present invention provides following technical scheme:

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