Shaped wide-beam circularly polarized antenna

Abstract

The shaped wide-beam circularly polarized antenna comprises a feed waveguide, a radiation waveguide, a circularly polarized open waveguide and a dielectric cover, the feed waveguide and the radiationwaveguide are connected or share the same wall, and a coupling piece is arranged between the feed waveguide and the radiation waveguide; the end face, away from the feed waveguide, of the radiation waveguide is provided with a plurality of slits used for generating linearly polarized waves, and the slits are evenly arranged in a staggered mode along the center line of the wide edge direction of the radiation waveguide. The circularly polarized open waveguide is connected with the radiation waveguide and is provided with open waveguide bodies in one-to-one correspondence with the slots; and thedielectric cover is sleeved on the circularly polarized open waveguide, the dielectric cover is provided with beam forming rings in one-to-one correspondence with the open waveguide bodies, and the waveform forming rings are used for broadening circularly polarized waves. Due to the fact that the circular polarization open waveguide is arranged in a rotating mode, conversion from electromagneticwave linear polarization waves to circular polarization is achieved, and information transmission and receiving are facilitated; due to the fact that the beam forming rings are arranged, the antenna can obtain fan-shaped beams with high gain.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a shaped wide-beam circularly polarized antenna. Background technique [0002] Circularly polarized antennas have broad application prospects in communications, radar, electronic countermeasures, telemetry and remote sensing, astronomy, and television broadcasting. Rolling aircraft communication; in electronic countermeasures, circularly polarized antennas can detect various linearly polarized or elliptically polarized electromagnetic waves of the enemy; in astronomy, spaceflight, remote sensing and telemetry, circularly polarized antennas can eliminate The polarization distortion effect of electromagnetic waves caused by the rotation effect; in broadcasting and television, circularly polarized antennas can overcome the ghosting phenomenon of video signals. [0003] In the existing technology, the pencil beam of the fire control radar only has the advantage of pre...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the pencil beam of the fire control radar only has the advantage of precise positioning, and it is difficult to achieve fast and large-scale search in the air warning that needs to search a large area of ​​airspace;

[0004] For ship communication that is always in a turbulent state, in the existing technology, the beam width on the pitch plane is not enough, it is easy to lose the target in the pitch direction, and lose the resolution of the azimuth plane

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