A Broadband Separator Circular Polarizer

Abstract

The invention relates to a broadband separator circular polarizer, which comprises a square waveguide and a rectangular waveguide located at two ports of the cavity of the circular polarizer respectively. The rectangular waveguide comprises a first rectangular waveguide and a second rectangular waveguide separated by a plurality of sequentially-connected separator steps; the plurality of separatorsteps are arranged in a downslope shape in a direction from the rectangular waveguide to the square waveguide; the plurality of separator steps are located in the right middle of the circular polarizer cavity; the first rectangular waveguide and the second rectangular waveguide have the same section size and the same shape; in the plurality of separator steps, the thicknesses of two separator steps close to the square waveguide are greater than those of other separator steps; and the rest separator steps except the two separator steps close to the square waveguide have the same thickness. Thecircular polarizer of the invention has a simple structure, can generate circular polarization waves of different rotational directions, and is convenient for characteristic matching and isolation degree adjusting.

Description

technical field [0001] The invention belongs to the technical field of circular polarizer design, and in particular relates to a broadband separator circular polarizer. Background technique [0002] With the development of satellite communication broadband technology, the Ka-band antenna feeder system requires the feeder to be small in size, the transceivers are circularly polarized, the left and right rotations are optional, and the working bandwidth is 18GHz-30GHz. Among them, the receiving frequency band (downlink) is 18GHz-20.2GHz, and the transmitting frequency band (uplink) is 28.1GHz-30GHz. If the traditional dielectric waveguide circular polarizer and corrugated waveguide circular polarizer are used, not only the size is large, but also only one At the same time, traditional dielectric waveguide circular polarizers and corrugated waveguide circular polarizers are cumbersome to adjust matching characteristics and isolation, and need to be designed separately for diffe...

AI Technical Summary

Problems solved by technology

Among them, the receiving frequency band (downlink) is 18GHz-20.2GHz, and the transmitting frequency band (uplink) is 28.1GHz-30GHz. If the traditional dielectric waveguide circular polarizer and corrugated waveguide circular polarizer are used, not only the size is large, but also only one At the same time, the traditional dielectric waveguide circular polarizer and the corrugated waveguide circular polarizer are more troublesome to adjust the matching characteristics and isolation, and need to be designed separately for different scheme requirements

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