Circularly polarized waveguide slot antenna for satellite

Abstract

The invention provides a circularly polarized waveguide slot antenna for a satellite, and the antenna comprises a microstrip radio frequency board and a waveguide body; the microstrip radio frequency board comprises a radio frequency chip and a microstrip line connected with the radio frequency chip, the radio frequency chip is used for transmitting a high-frequency signal, and the microstrip line is used for converting the high-frequency signal into an electromagnetic signal; and the waveguide body is connected with the microstrip radio frequency board, a waveguide cavity is formed in the waveguide body, an electromagnetic signal is transmitted in the waveguide cavity, a waveguide slot combination is formed in the cavity wall, away from the microstrip radio frequency board, of the waveguide body, and the waveguide slot combination is used for performing circular polarization radiation on the electromagnetic signal transmitted in the waveguide cavity. The waveguide cavity and the waveguide slot formed in the waveguide cavity are combined to serve as a radiation system of the antenna, and the advantages of high gain, high efficiency and low side lobe are achieved; and the microstrip radio frequency board is arranged as a feed system of the antenna, so that the antenna has the advantages of being simple in structure, easy to integrate and low in cost.

Description

technical field [0001] The present application relates to the field of satellite communication, in particular, to a circularly polarized waveguide slot antenna for satellites. Background technique [0002] Existing commercial satellites usually use flat panel antennas, reflector antennas, lens antennas or waveguide slot antennas. The flat panel antenna has the advantages of low profile, the integration of active components, and the integrated design of the radiation unit and the network. However, the dielectric loss of the panel antenna is large, and there is a leakage wave effect, the gain of the antenna unit is low, and the loss of the feed network is large. [0003] The reflector antenna has good radio frequency performance, and also has the advantages of low dropout and high radiation efficiency, but the physical size of the reflector antenna is relatively large, so it is not suitable for some occasions where the installation space is small. [0004] Lens antennas are ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiment of the present application is to provide a circularly polarized waveguide slot antenna for satellites, which is used to improve the problems of difficult integration, high cost and low gain of antennas used for commercial satellites in the prior art

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