Circularly polarized dipole antenna for satellite communication

Abstract

The invention belongs to the field of satellite mobile communication and relates to a circularly polarized antenna design, in particular to a circularly polarized dipole antenna for satellite communication. The circularly polarized dipole antenna has the advantages of wide band, wide wave beam and good low-elevation angle circular polarization performance. The circularly polarized dipole antenna comprises a dielectric substrate, a metal reflecting plate, four dipole antenna radiation arms, four parasitic patches, four metal conductive walls and a coaxial feeder; the conductive walls capable ofbroadening lobes are applied to the circularly polarized crossed dipole antenna in a combined manner; the metal reflecting ground plate, the conductive walls and the parasitic patches jointly form magnetic dipole antennas; lobe broadening is carried out on the basis of the complementation of the radiation patterns of the magnetic dipoles and the electric dipoles, so that gain at a low elevation angle can be improved; and thus, the circularly polarized dipole antenna for satellite communication has the advantages of wide band, wide wave beam, low elevation angle, good circular polarization performance, simple structure and easiness in installation, and is more suitable for satellite communication.

Description

technical field [0001] The invention belongs to the field of satellite mobile communication and relates to the design of a circularly polarized antenna, in particular to a wide-band, low-elevation, high-gain, wide-beam circularly polarized dipole antenna for satellite communication. Background technique [0002] The types of circularly polarized antennas commonly used in satellite mobile communications mainly include four-arm helical antennas, microstrip antennas, and crossed dipole antennas. In the satellite navigation and positioning system, in order to receive as many satellite signals as possible and obtain a better signal-to-noise ratio, the satellite navigation and positioning system requires the antenna not only to have wide-angle circular polarization coverage, but also to have high low-elevation gain and Wide beamwidth. [0003] The literature "Bu Dewen, Chen Xi, Fu Guang. An ultra-wide bandwidth beam circularly polarized antenna [C]. Proceedings of the 2017 Nation...

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Problems solved by technology

[0008] The object of the present invention is to provide a circularly polarized dipole antenna for satellite communications against the defects of existing satellite communications antennas, which has the advantages of broadband, wide beam, and low elevation angle circular polarization performance, and has a simple structure , easy to install, can be used in satellite communication

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