Double-star and double-beam phased-array antenna for S-frequency band satellite communication

Abstract

The invention discloses a double-star and double-beam phased-array antenna for S-frequency band satellite communication. The phase-array antenna comprises a dual-circular-polarization antenna array, a radio-frequency circuit layer, a transceiving feed network and a wave controlled and power supply board which are sequentially arranged from top to bottom, wherein the dual-circular-polarization antenna array comprises a plurality of dual-circular polarization antenna units, the radio-frequency circuit layer comprises a plurality of radio-frequency device combinations, the positions of the plurality of radio-frequency device combinations are in one-to-one correspondence to the positions of the dual-circular polarization antenna units, and the radio-frequency device combinations are isolated by metal tapes. The phased-array antenna provided by the invention is used for partitioning an S-frequency band transceiving signal by internal radio-frequency branches, so that the phased-array antenna can work two frequencies of large S and a relay, two wave beams are formed according to time, and the phased-array antenna can be communicated with a large S satellite and a relay satellite according to time. A system adopts a phased-array technique to carry out space wave beam scanning, and rapid tracking of the signal is achieved.

Description

technical field [0001] The technical field involved in the present invention covers satellite communication, satellite navigation, satellite positioning, remote control and telemetry, etc., and is specifically a double-star double-beam S-band satellite communication phased array antenna. The invention is also particularly suitable for time-sharing communication between the big S and the relay satellite on the moving carrier, and can switch signals between the two satellites according to the specific usage conditions. The invention has the characteristics of fast signal tracking, signal switching, signal capture, signal sending and receiving separation, and the like. Background technique [0002] In the field of satellite communication, S-band satellite communication is an important communication spectrum. There are more and more user terminals working on the S-band multiple access (SMA) link of the relay satellite system. Compared with the Tianlian-1 relay satellite system, ...

AI Technical Summary

Problems solved by technology

[0003] 1. Traditional mechanical tracking antennas, such as reflector antennas and flat panel array antennas, have the characteristics of high gain and low manufacturing cost, but they have great disadvantages in terms of bulkiness, inconvenient disassembly and assembly, and slow tracking speed. The tracking speed is slow and cannot be well adapted to the needs of high mobility platforms

[0004] 2. One-dimensional active phased array antennas. Although the antennas of this type have the advantage of relatively low cost, they are subject to many restrictions in the field of satellite communications. For example, they are still bulky and still require azimuth Disadvantages of Mechanical Tracking

[0005] 3. The traditional single-satellite single-beam active phased array antenna has the advantages of fast beam tracking and advanced system, but it does not have the ability of dual-satellite tracking, and users cannot switch between inter-satellite links as needed, so that It loses the ability to reuse functions

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