Ku-waveband wideband OMT

Abstract

The invention belongs to the technical field of antenna feed sources in a satellite communication device, and particularly relates to a Ku-waveband wideband OMT. The OMT comprises a square waveguide, a branch waveguide and a square matrix transformation section; a head end surface of the square waveguide is provided with a common port; a waveguide step is arranged at one side of the square waveguide, and the branch waveguide is transduced at step surface places of the waveguide step; an output port of the branch waveguide is formed into a horizontal polarization port; a tail end surface of the square waveguide is provided with the square matrix transformation section; an output port at a tail end place of the square matrix transformation section is formed into a vertical polarization port; at the side where the waveguide step of the square waveguide is located, gradual changing values for heights of continuous step surfaces formed by the waveguide step and the square matrix transformation section fit for a chebyshev function; and gradual changing values for heights of step surfaces formed at the square matrix transformation section of the square waveguide also fit for the chebyshev function. The Ku-waveband wideband OMT has the advantages of compact structure, high bandwidth and small size, and can meet the use requirement of a satellite array antenna.

Description

technical field [0001] The invention belongs to the technical field of antenna feed sources in satellite communication equipment, and in particular relates to a Ku-band broadband orthogonal mode coupler. Background technique [0002] Orthogonal mode coupler, referred to as OMT, is an important part of the dual-polarization antenna feeder system, and has been widely used in satellite communication, radio astronomy and military radar. OMT can solve the problem of frequency multiplexing in a large-capacity communication system, and can realize duplex transmission (that is, combination and separation) of orthogonally polarized signals on the same frequency. With more and more broadband work requirements for Ku-band feed sources, to realize Ku dual-wire polarized transceiver, an OMT combined with a frequency duplexer can be used. However, the relative bandwidth of the traditional OMT is generally only about 10%. Although the bandwidth of broadband forms of OMT such as Boifot OM...

AI Technical Summary

Problems solved by technology

However, the relative bandwidth of traditional OMT is generally only about 10%

Although the bandwidth of broadband forms of OMT such as Boifot OMT, fin linear OMT, symmetrical reverse coupling waveguide OMT and four-ridge waveguide OMT can reach 30%, but there are complex structures, large dimensions, not pure waveguide form, and great influence on processing. High precision requirements and even the need to add tuning components

Images