船载卫通地球站G/T值外场测量研究  

G/T Value Outfield Measurement of Shipborne Satcom Earth Station

作　　者：陈连顺 CHEN Lianshun(Unit 91404 of PLA,Qinhuangdao Hebei 066001,China)

机构地区：[1]中国人民解放军91404部队,河北秦皇岛066001

出　　处：《通信技术》2021年第1期259-262,共4页Communications Technology

摘　　要：卫通地球站的天线增益G与表示接收系统噪声性能的等效噪声温度T的比值称之为G/T值,是衡量卫通地球站灵敏度的重要技术指标。因此,设计了一种基于对比法的船载卫通地球站G/T值外场测量及改进方法,并在某船载UHF频段卫星通信地球站G/T值外场测量试验中对两种测量方法进行比对。针对天线罩差损值测量数据出现负值的情况,重点分析了负值产生的原因。The ratio of the antenna gain G to the equivalent noise temperature T representing the noise performance of the receiving system is called G/T value,which is an important technical index to measure the sensitivity of satcom earth station.Therefore,an outfield measurement and improvement method for the G/T value of the shipborne satcom earth station based on the comparison method is designed,and the two measurement methods are compared in the outfield measurement test of the G/T value of a shipborne UHF frequency band satcom earth station.In view of the negative value of the measurement data of the radome loss value,analysis is focused on the causes of negative values.

关 键 词：卫星通信 G/T值 动中通 天线罩差损 

分 类 号：TN927.2[电子电信—通信与信息系统]