UHF (Ultra High Frequency) temperature compensation device of coaxial resonant cavity

Abstract

The invention discloses a UHF (Ultra High Frequency) temperature compensation device of a coaxial resonant cavity. The UHF temperature compensation device comprises a cavity body, a short-circuit end cover plate, fastening bolts, an outside-cavity flange, an indium steel pull rod, an indium steel pull rod nut, fixed screw holes, a fixed jackscrew, an internal conductor fixing segment, an elastic element, an internal conductor movable segment and an indium steel pull rod screw, wherein the short-circuit end cover plate and the cavity body form an external conductor of the coaxial resonant cavity, the internal conductor fixing segment is arranged in the cavity body of the coaxial resonant cavity, the outside-cavity flange is arranged outside the cavity body of the coaxial resonant cavity, the internal conductor fixing segment and the outside-cavity flange are both fixed on the short-circuit end cover plate by a plurality of fastening bolts, the indium steel pull rod penetrates through a round through hole which sequentially penetrates through the outside-cavity flange and a central installation hole in a surface of the short-circuit end cover plate, and a bottom end of the indium steel pull rod is integrally connected with the internal conductor movable segment by the indium steel pull rod screw. The UHF temperature compensation device of the coaxial resonant cavity has functions of adaptive control on resonant frequency and temperature compensation.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a UHF broadband coaxial resonant cavity temperature compensation device. Background technique [0002] As we all know, coaxial resonant cavity is a commonly used microwave cavity structure, which is widely used in the field of radio and television wireless transmission, such as band-pass filter, multi-channel synthesizer and so on. The resonant frequency is one of the most important technical parameters of the coaxial resonant cavity, and the stability of the resonant frequency is an important index to consider the performance of the coaxial resonant cavity. [0003] However, when the TV radio frequency signal passes through the equipment containing the coaxial resonant cavity, due to the loss of the resonant cavity itself, part of the power will be converted into heat and dissipated on the equipment, causing the temperature of the resonant cavity to rise. Due t...

AI Technical Summary

Problems solved by technology

[0005] However, the traditional coaxial resonator performs temperature compensation, and this temperature compensation method is effective for a certain operating frequency

For the entire UHF TV channel, the resonant cavity needs to work in the full frequency band of 470-862MHz, and the traditional temperature compensation technology cannot guarantee that it is always effective in such a wide frequency range

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