Satellite-borne circular polarization horn array antenna

Abstract

The invention discloses a satellite-borne circular polarization horn array antenna. An SMA coaxial feeder socket (1) comprises an SMA socket body and a through hole, the SMA socket body is mounted on an input variation section of a circular polarizer (2), a feeding probe extends from other surface of the SMA socket body, penetrates into a hollow square waveguide (7) and belongs to a coaxial-waveguide feeding end, the circular polarizer (2) is positioned in the middle of the hollow square waveguide (7), one end of the circular polarizer (2) is connected with the bottom surface of the square waveguide (7), the other end of the circular polarizer (2) is a free end, the height of the circular polarizer (2) is lower than that of the square waveguide (7), the bottom end of a square horn mouth (3) is connected at the top of the free end of the square waveguide (7) and belongs to a beam forming section, a bottom end short circuit board (5) is used for short-circuiting the bottom end of the square waveguide, a mounting bottom board (6) is perpendicular to the square waveguide and used for connecting an antenna unit, and an antenna array is fixed to a star. According to the antenna, the radiation efficiency of the antenna is improved, and light weight is achieved.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and relates to a space-borne circularly polarized horn array antenna, which is mainly applied in satellite-to-ground data transmission and communication measurement and control of in-orbit satellites. Background technique [0002] Since the 1960s, satellite communication has developed rapidly and has been widely used in military and civilian applications. Especially in military applications, satellite communication is still its main means of communication, which cannot be replaced by other means of communication. Satellite data transmission and communication measurement and control all rely on space-borne antennas. With the continuous expansion of channel capacity, continuous improvement of transmission rates, and increasingly flexible service methods, the working bandwidth, radiation gain, and beam width of space-borne antennas, etc. The performance index requirements are getting hig...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the satellite attitude is not fixed and the wireless signal needs to pass through the atmosphere, it is impossible to use linear polarization signal communication, and circular polarization communication must be used;

[0005] 2. The existing space-borne antennas are mainly helical antennas and reflector antennas. Helical antennas cannot meet the requirements of long-distance communication due to their small gain. Reflector antennas are difficult to implement and costly due to high processing precision requirements for the reflector surface;

[0006] 3. Due to the narrow frequency bandwidth of the existing spaceborne antenna, it cannot meet the requirements of large-capacity data transmission and spread spectrum communication;

[0007] 4. The existing spaceborne antenna is applied outside the cabin, the environmental conditions are high, and the material selection is limited

Images