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本文介绍用于CDMA小型卫星通信地面站收发自环试验以及整机测试用的卫星通信线路模拟器。本系统在4/6GHz频段的500MHz带宽内,6GHz频带额定输入功率电平为50dBm,4 GHz频带输出功率电平可小于-140dBm,且有大于80dB的调节量,可连续调节40dB。输入输出口驻波系数均小于1.1。若外加大功率衰减器(即大功率负载)还可以用于较大型的地面站设备。本系统可在环境温度为-10℃至+50℃内正常工作。
This article describes the satellite communication line simulator for the CDMA small satellite communication ground station transceiver loop test and machine testing. The system in the 4 / 6GHz band 500MHz bandwidth, 6GHz band rated input power level of 50dBm, 4GHz band output power level can be less than -140dBm, and there is more than 80dB of adjustment, the continuous adjustment of 40dB. I / O VSWR coefficients are less than 1.1. If the addition of high-power attenuator (ie high-power load) can also be used for larger ground station equipment. The system can work in ambient temperature -10 ℃ to +50 ℃.