Miniaturized coaxial waveguide orthogonal mode coupler

Abstract

The invention discloses a miniaturized coaxial waveguide orthogonal mode coupler, and belongs to the technical field of microwave antennas. The coaxial waveguide comprises a coaxial waveguide outer waveguide, a low-frequency-band coupling waveguide, a coaxial waveguide inner waveguide, a short circuit plate, a high-frequency-band coupling waveguide, a waveguide absorption load and a waveguide resonant cavity, the coaxial waveguide outer waveguide and the coaxial waveguide inner waveguide are coaxially connected to form a coaxial waveguide; the outer waveguide of the coaxial waveguide is provided with a low-frequency coupling hole connected with a low-frequency coupling waveguide to realize transmission of low-frequency signals; the outer waveguide of the coaxial waveguide is provided with a high-frequency coupling hole to be connected with a high-band coupling waveguide so as to realize transmission of high-frequency signals; the low-frequency coupling hole and the high-frequency coupling hole form an included angle of 90 degrees on the outer waveguide of the coaxial waveguide; and the short circuit plate is inserted from the slot on the coaxial waveguide, is in good contact with the waveguide in the coaxial waveguide, and is positioned between the low-frequency coupling hole and the high-frequency coupling hole. The antenna has the characteristics of compact structure and miniaturization, and can meet the application of a small-caliber receiving and transmitting common antenna.

Description

technical field [0001] The invention relates to the technical field of microwave antennas, in particular to a miniaturized coaxial waveguide orthogonal mode coupler. Background technique [0002] With the rapid development of science and technology, the application of satellite communication has become more and more extensive. Due to the extreme shortage of frequency resources, the bandwidth of satellite communication reflector antennas can be expanded by using various multiplexing technologies, and satellite communication can achieve multiple Common use of frequency bands, these functions are mainly completed by the feeder system. At present, satellite communication antennas are developing in the direction of multi-polarization, multi-band, broadband, etc., and at the same time, they must meet the requirements of miniaturization, light weight, and low cost. [0003] Orthogonal mode couplers (OMT) are widely used in dual-polarized antenna feed networks. It can synthesize a...

AI Technical Summary

Problems solved by technology

Probe feeding generally has a narrow bandwidth, and power dividers, phase shifters, etc. are required to excite symmetrical probes, and the subsequent structure is more complicated

The other is to combine two orthogonal orthogonal line polarizations separately through a turnstile and an E-plane four-arm rectangular T-shaped synthesizer outside the coaxial waveguide. Further separation of transceivers requires a frequency duplexer. implementation, the synthetic network complex

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