Mobile satellite communication multi-subarray panel antenna array and optimization method thereof

Abstract

The invention discloses a mobile satellite communication multi-subarray panel antenna array and an optimization method thereof. The antenna array comprises a plurality of panel antenna subarrays, an antenna turntable and a plurality of feeder line systems connected between radiation units of the panel antenna subarrays and signal transceiving ports respectively, wherein the plurality of panel antenna subarrays are arranged in parallel on the antenna turntable and have the same target elevations; and the feeder line systems comprise phase shifters and a plurality of sets of delay lines. The optimization method comprises the following steps of: 1, setting parameters; 2, performing antenna subarray distance optimization by adopting an operation processor and using an improved genetic algorithm; and 3, performing delay line length optimization by adopting the operation processor. The antenna array has the advantages of simple structure, light weight, low height, low cost and convenient installation and layout; and the adopted optimization method has reasonable design and convenient implementation, and can effectively solve two practical problems between antenna radiation pattern characteristic variation of the multi-subarray panel antenna array and minor level rise and instantaneous signal bandwidth reduction of the antenna.

Description

technical field [0001] The invention relates to a multi-subarray antenna array for mobile satellite communication, in particular to a multi-subarray flat panel antenna array for mobile satellite communication and an optimization method thereof. Background technique [0002] Satellite communication system in motion refers to a system in which mobile carriers (such as automobiles, trains, airplanes, ships, etc.) realize real-time communication with target satellites (stationary or fixed-point satellites, that is, geostationary orbit satellites) during rapid operation. In actual work, because the distance between the target satellite and the ground is very long (about 40,000 kilometers), high-gain antennas must be used to achieve high-code-rate multimedia communication between the satellite and the ground carrier. Since the beam width of this antenna is very narrow, to ensure that the carrier can communicate with the satellite normally and uninterruptedly during the rapid movem...

AI Technical Summary

Problems solved by technology

Due to the discrete aperture of the multi-sub-array flat panel antenna array itself, the performance of the antenna is greatly affected, and the side lobe level is high. At the same time, the instantaneous signal bandwidth of the antenna is small due to the long transit time of the aperture after splitting the plate.

To sum up, the flat panel antenna has obvious advantages in height, and can meet the requirements of various mobile carriers for its miniaturization and easy installation. Compared with a single panel antenna, the multi-subarray panel antenna array mainly brings two Problem: One is that the characteristics of the antenna pattern deteriorate and the level of the side lobe rises, and the other is that the instantaneous signal bandwidth of the antenna becomes smaller

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