Dual-circularly-polarized broadband wide-beam antenna

Abstract

The invention provides a dual-circularly-polarized broadband wide-beam antenna. The antenna comprises a circular waveguide, a feed probe, a load probe, a partition plate phase shifter and a metal ring group; the feed probe, the load probe and the partition plate phase shifter are all located in the circular waveguide, and the feed probe and the load probe are located on the two sides of the partition plate phase shifter respectively. One end face of the circular waveguide is closed, and the other end face is provided with an opening; energy fed in by the feed probe is converted into circularly polarized waves through the partition plate phase shifter and then is radiated outwards from the opening; the metal ring group is positioned beside the opening and is used for introducing horizontal annular magnetic current; the side wall, close to the opening, of the circular waveguide is provided with a hollowed-out groove set used for introducing vertical magnetic current. Circularly polarized waves with directional radiation are formed through the circular waveguide and the partition plate phase shifter; horizontal annular magnetic current is introduced, and the half-power beam width is increased; the vertical magnetic current is introduced, the half-power beam width in the broadband is further improved, the difference value of the E theta sum in a certain beam is reduced, and the axial ratio beam width is improved.

Description

technical field [0001] The invention relates to the technical field of circularly polarized antennas, in particular to a dual circularly polarized wide bandwidth beam antenna. Background technique [0002] With the development of modern technology, people's information exchange is becoming more and more frequent. In recent years, in order to better transmit electromagnetic waves, satellite communications usually choose to use wide-beam circularly polarized antennas. In some special use environments, it is necessary to design an antenna with a wider beam in the communication system to transmit and receive electromagnetic waves, so as to realize communication between devices in a wide area. The designed antenna with a wider beam requires less radiation power drop within a certain beam range, and can effectively receive radio signals at low elevation angles, thereby achieving effective reception and transmission of electromagnetic waves in a larger range. [0003] In the prio...

AI Technical Summary

Problems solved by technology

The microstrip antenna can radiate by changing the ground structure and adding vertical current near the main radiator. It can realize a wide half-power beam in a narrow operating frequency band, but it is difficult to maintain a good axial ratio characteristic in the beam.

In the prior art, multiple annular choke grooves are added to the horn mouth surface to broaden the half-power beam, but its lateral dimension is too large

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