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采用多波束接收天线的低轨卫星通信系统,其各波束的多普勒特性有别于采用单波束天线的系统.为分析各波束的多普勒特性,通过建立矢量分析模型推导了波束覆盖区的等多普勒曲线表达式,仿真实验给出了特性曲线;结合多波束覆盖范围的计算,完成了各接收多波束的多普勒特性分析;最后说明了该特性在星载多波束捕获模块设计中的初步应用.
The low-orbit satellite communication system with multi-beam receiving antenna has different Doppler characteristics of each beam compared with a single-beam antenna system.In order to analyze the Doppler characteristics of each beam, a vector analysis model is used to derive the beam coverage area The Doppler curve expression of the received multi-beam is obtained, and the characteristic curve is given through the simulation experiment. The Doppler characteristic analysis of each received multi-beam is completed according to the calculation of the multi-beam coverage. Finally, Initial application in design.