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天线组阵能大幅度提高深空通信上行链路的等效全向辐射功率(EIRP)。该文对影响阵性能的各种因素进行了分析,并基于远场叠加原理建立了数学模型,得到各因素误差的统计特性与阵增益损失均值之间的关系,分析表明主要的影响因素是大气相位、发射信号相位和阵元指向。针对国内外2个典型阵进行了仿真,仿真结果验证了理论分析的结论,只要合理控制各主要影响因素的误差范围,可以保证阵性能损失小于0.5dB。
Antenna array can significantly improve the equivalent uplink radiated power of deep space communications (EIRP). In this paper, various factors affecting the performance of the array are analyzed. Based on the principle of far-field superposition, a mathematical model is established, and the relationship between the statistical characteristics of each factor error and the mean value of array gain loss is obtained. The analysis shows that the main influencing factor is the atmosphere Phase, phase of the transmitted signal and array element pointing. The simulation results of two typical arrays at home and abroad are validated. The simulation results verify the conclusions of the theoretical analysis. As long as the error range of each major influencing factor is reasonably controlled, the performance loss of the array can be guaranteed to be less than 0.5dB.