G/T值测试三原则及G/T值测量方法  

The three test principles and measurement methods of G/T value

作　　者：李文[1] 马忠松[1] 

机构地区：[1]中国科学院光电研究院,北京100094

出　　处：《国外电子测量技术》2011年第6期33-36,共4页Foreign Electronic Measurement Technology

摘　　要：天线系统的增益G与接收系统噪声温度T的比值称之为G/T值,是信道各参数中十分重要的技术指标,是衡量地面站灵敏度的质量指标,G/T值越高,表明地面站检测来自卫星信号的能力越强。总结了多年以来测量天线G/T值或G值时需遵循的三原则,即"看得见、保精度、跟得上"三原则,以及其对于实际测试与接收工作具有指导作用;比较了卫星地面站G/T值常见测试方法。G/T value is the ratio of antenna system gain G and the receiving system noise temperature T,which is one of the most important technical indicator for channel parameters.G/T value is also one of the quality indicators for sensitivity of ground station.The high G/T value indicats the strong test ability of ground station for sinal from satellite.The three principles,＂visible,security accuracy and keep up＂,together with their guidance for practical testing and reception mission are introduced.The general test methods of G/T value for satellite ground station are compared.

关 键 词：G/T值测试 射电源法 卫星源法 波束宽带法 

分 类 号：TN927[电子电信—通信与信息系统]