中波发射机阻抗测试浅谈  

Discussion on Impedance Testing of Medium Wave Transmitters

作　　者：涂浩 TU Hao(Guizhou provincial Radio and Television Bureau 827 Station,Bijie 551700,China)

机构地区：[1]贵州省广播电视局八二七台,贵州毕节551700

出　　处：《电视技术》2023年第8期126-129,共4页Video Engineering

摘　　要：针对中波发射机维护中快速、准确确定故障节点的问题,阐述反射功率、驻波比两个重要指标变化与发射机天调网络以及匹配网络节点阻抗失衡之间的内在关联,分别给出天线匹配网络和发射机匹配网络的结构及调节原理,以某中波发射机为例,介绍发射机阻抗测试工具与详细过程。结果表明,阻抗测试能够为中波发射机系统的故障诊断与处理提供有利的参考依据。Aiming at the problem of fast and accurate determination of faulty nodes in the maintenance of medium-wave transmitter,this paper describes the internal relationship between the changes of two important indicators,namely reflected power and standing wave ratio,and the impedance imbalance of the transmitter antenna network and the matching network node.The structure and regulation principle of the antenna matching network and the transmitter matching network are given respectively.The measuring tool and detailed procedure of transmitter impedance are introduced.The results show that impedance measurement can provide a favorable reference for fault diagnosis and treatment of medium wave transmitter system.

关 键 词：中波发射机 检测维护 匹配网络 阻抗测试 

分 类 号：TN838[电子电信—信息与通信工程]