Ka-band compact high-efficiency broadband dual circularly polarized antenna

Abstract

The invention discloses a Ka-band compact high-efficiency broadband dual circularly polarized antenna, which comprises a metal waveguide wall, a left-hand circularly polarized input port, a right-hand circularly polarized input port, a left-hand gradually-changing step matching waveguide cavity, a right-hand gradually-changing step matching waveguide cavity, a multi-metal boss gradually-changing coupling network, a vertical polarization transmission waveguide cavity, a horizontal polarization forming waveguide cavity and circularly polarized wave radiation ports are arranged in the metal waveguide wall. The left-hand circularly polarized input port is connected with the multi-metal boss gradual change coupling network through the left-hand gradually-changing step matching waveguide cavity; the right-handed circularly polarized input port is connected with the multi-metal boss gradual change coupling network through the right-handed gradually-changing step matching waveguide cavity. The multi-metal boss gradually-changing coupling network is connected with the two circularly polarized wave radiation ports through the vertical polarization transmission waveguide cavity and the horizontal polarization transmission waveguide cavity. The antenna is formed by all-metal integrated processing, is compact and stable in structure, is high in radiation efficiency, and meets the working requirements of light weight, low cost, high gain and broadband.

Description

technical field [0001] The invention relates to the technical field of Ka-band circularly polarized antennas, and more specifically relates to a Ka-band compact, high-efficiency, broadband dual-circularly polarized antenna. Background technique [0002] Compared with traditional frequency bands such as C and Ku, the Ka frequency band has the most abundant available frequency resources, which can provide considerable expansion space for the broadbandization of satellite communications. In addition to abundant frequency resources, the Ka-band has less development, and the electromagnetic spectrum is relatively pure, and the high Ka-band can be far away from the frequency range where the general ground communication system is located, and has a natural high anti-interference performance. In order to reduce the delay spread caused by multipath effects, reduce intersymbol crosstalk, reduce bit error rate, improve communication quality, and reduce the Faraday rotation effect cause...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing Ka-band circularly polarized antenna cannot simultaneously meet the working requirements of light weight, low cost, high gain, and broadband

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