Broadband quadruple-ridged waveguide circular polarizer

Abstract

The invention discloses a broadband quadruple-ridged waveguide circular polarizer and belongs to the technical field of satellite communication. The broadband quadruple-ridged waveguide circular polarizer comprises a square waveguide cavity, two vertical ridges and two horizontal ridges, wherein the two vertical ridges are respectively arranged the opposite waveguide walls, and the two horizontalridges are respectively arranged on the other two waveguide walls. The broadband quadruple-ridged waveguide circular polarizer disclosed by the invention utilizes the quadruple-ridged waveguide broadband characteristic, so that the heights and the widths of two pairs of orthogonal ridges are different, and propagation constants of two orthogonal polarization waves can be changed; according to theprinciple of the circular polarizer, when two polarization waves with the same amplitude and the same phase pass through the circular polarizer, the amplitudes of the two polarization waves are equal,phase difference is 90 degrees, and circular polarization is formed; meanwhile, no loading and phase shifting unit and no toothed groove structure are arranged on the ridges, so that the defect thatan existing circular polarizer cannot be applied to 1mm waveband is overcome; the broadband quadruple-ridged waveguide circular polarizer has the characteristics of application to L waveband to W waveband, wide work frequency band, excellent electric performance, simple structure, no debugging, high reliability and suitability for volume production.

Description

Technical field [0001] The invention discloses a broadband four-ridge waveguide circular polarizer, which relates to the fields of satellite communications and radio astronomy antennas and is suitable for feed network systems of satellite communications and radio astronomy antennas. Background technique [0002] In fields such as satellite communications and radio astronomy, circularly polarized antennas have been widely used. The circular polarizer is used to convert linearly polarized signals into circularly polarized signals and is an important component in circularly polarized antennas. With the development of satellite communication technology and next-generation radio astronomy telescope technology, the need for broadband operation is becoming more and more urgent. Therefore, broadband circular polarizer technology is one of the key technologies for broadband circularly polarized reflector antenna feeds. [0003] The circular polarizer is the main component that dete...

AI Technical Summary

Problems solved by technology

The circular polarizer can only be processed by splicing, its accuracy is greatly affected by the assembly, and the tiny size of the slot structure has the disadvantage that it cannot be processed, so it is difficult to apply to the 1mm millimeter wave band

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