地面模拟系统DBF接收机设计

The design multi-channel receiver of digital beam-forming in satellite ground simulation system

在卫星的地面测试中,地面模拟系统发送遥控遥测信号并接收卫星的返回信号,将其下变频到中频进行解调,从而获取卫星工作状态和运行环境,模拟其在轨运行工作情况。针对目前采用有源相控阵天线技术的卫星地面测试,本文设计实现了一种DBF体制的地面模拟系统接收机,该接收机采用超外差式二次变频设计,具有高增益、低噪声系数、低群时延波动、良好的通道间幅相一致性和稳定性,同时集成度高,体积小,可制造性强,能够充分的满足采用有源相控阵技术的卫星地面测试要求。

The function and properties of satellite are measured using satellite ground simulation system when carries on ground testing.The satellite ground simulation system sends remote-control and remote-measurement signals and receives response signals of satellite,and then down conversion to intermediate frequency to demodulation,so the real situation of satellite can be obtained as if it was operating in real orbits.In order to meeting the ground testing demand of satellite that using active phased array antenna techniques,in this paper,we design multi-channel receivers of digital beam-forming in the satellite ground simulation system.This receiver has a supersecondary structure,and can achieve high stability and consistency of amplitude and phase.This receiver has characteristics of high degree of integration,compact structure,excellent performance of stabilities among it s multiple channels in amplitude and phase,and good implementation in manufacturing.