本文給出了一種簡便的天饋系統性能參數的細微特征分析方法。應用該方法，可以
對天饋系統的反射系數、駐波比、故障距離和回波損耗等參數進行細微分析，在天饋系統出現重大故障前發現細小的、難于確認的問題，打破了傳統的在發生故障之后修理的維護方法。
關鍵詞：天饋系統；性能參數；故障距離

Minute features analysis of performance parmeter of the antenna and cable systems HU Lin ZHANG Jing-tang (Information Engineering University, Zhengzhou Henan 450002, China) Abstract In this paper, a simple and convenient method for minute features analysissing of performance parameter of the antenna and cable system is presented. With this method, we can analysis some parameters of the antenna and cable system, such as reflectance, standing wave ratio, DTF(distance-to-fault) and return loss, it breaks away from the traditional fix-after-failure maintenance process by? finding small, hard to identify problem before major failures occur.
Key words antenna and cable system, performance parameter, distance-to-fault