中长波小信号功率驻波表设计与制作

Design and Fabrication of the Power Standing Wave Meter for Medium and Long Wave Small Signals

针对用于中长波测量的功率驻波表较少,且一般的驻波表对小信号检测的准确度低等一系列问题,设计了一个用于中长波小信号测量的功率驻波表。该表通过运用串联匹配定向耦合电路、反馈式峰值检波电路及信号运算电路,使得工作频率降低,并大大提高了小信号检测的准确性。经过测试表明,该表准确度高,操作简单,效果甚佳。

There are rare power standing wave meters can be used ior medium and long wave measurement, and the general standing wavemeters offer low accuracy in detection of small signals, thus the power standing wave meter suitable for measurement of medium and long wavesmall signals has been designed. By adopting tandem matching directional coupling circuit, feedback type peak value detecting circuit andsignal operation circuit, the operating frequency becomes lower and the accuracy for small signal detection is greatly increased. The testsindicate that the meter is precise, easy to operate and with excellent effects.