A Waveguide-Based Microwave Frequency Selector

Abstract

The invention discloses a microwave frequency selection device based on a waveguide, which comprises a hollow waveguide box and a dielectric column, the waveguide box is a columnar structure, the cavity of the waveguide box is a cylindrical structure, and the cavity of the waveguide box is used to accommodate the first A dielectric column and a second medium, the first dielectric column is a cylindrical structure, the radius of the first dielectric column is smaller than the radius of the cavity, and the gap between the cavity and the first dielectric column is partially filled with the second medium to obtain microwave frequency selection The frequency point at which the equivalent magnetic permeability of the device is zero is the cut-off frequency of the microwave frequency-selective device, thereby realizing the function of filter frequency selection. Compared with the current microwave frequency-selection technology, the waveguide filter frequency-selective device has Sensitive and accurate frequency selection, convenient and flexible adjustment of transmittance, simple structure and not easy to damage, flexible disassembly and assembly, stable transmission, small loss, and high power withstand.

Description

technical field [0001] The invention belongs to the field of microwaves, in particular to a waveguide-based microwave frequency selection device. Background technique [0002] Research and development of microwave frequency-selective devices is an important direction in the field of microwave engineering. Microwave frequency-selective devices are widely used in various microwave radio frequency equipment. The current microwave frequency-selective devices are mainly realized by two technical approaches, that is, to realize by multi-stage series connection of frequency-selective circuits of LC components, or to realize by using microstrip filtering and frequency-selection. [0003] However, for the realization of multi-stage series series of frequency selection circuits of LC components, the higher the filtering accuracy requirements are, the more LC frequency selection circuits need to be connected in series, resulting in high cost and complex structure of such high-precisio...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a waveguide-based microwave frequency-selective device, aiming to solve the technical problem that the microwave frequency-selective device can be flexibly adjusted while realizing high-frequency filtering

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