Algorithm Weights Optimization Method for Inter-Satellite Communication Array Antennas Based on Differential Evolution Algorithm

摘要

The inter-satellite communication network is an important part of the communications satellite system and relay satellite system. Interference faced by inter-satellite communication networks comes mainly from ground. Therefore, the inter-satellite communication networks need to be able to avoid intentional or unintentional interference from the ground, to be able to ensure the sound operation of the whole system. Optimum design of antennas is an important means to satisfy the special needs for inter-satellite communication networks to stand against ground interference. Array antennas are preferred for inter-satellite pay-load design due to its excellent characteristics of enhancing useful signals while suppressing interference. This article analyzed the features of the working environment of inter-satellite communication array antennas, established a spatial filter model, optimized the array weights by differential evolution algorithm, and designed array patterns which satisfy the special need of inter-satellite communication. Experimental results show that the proposed method achieved very good results, the designed array pattern provides interference rejection capability of 46 dB to the ground direction, which well meet the requirement of inter-satellite communication anti-jamming antenna designing.