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本文介绍一种通过测量幅频特性曲线来获得超高频段二端网络阻抗的方法。采用一些通用仪表替代专用性较强的阻抗测试仪、阻抗图示仪及等距开孔测量线等,以满足目前民用通讯设备大量发展的需要。(一)幅频特性法说明用测量线测量阻抗时,通过主线上驻波比的测量而求得。即在信号源频率固定情况下,用移动的探针测量主线上的电压分布而获得驻波比。我们的方法是固定主线上测量点位置,改变信号源频率,获得类似
This article presents a method for obtaining the impedance of a two-terminal UHF network by measuring the amplitude-frequency characteristic curve. The use of some general-purpose meters instead of the more specialized impedance tester, impedance diagram and equidistant openings measuring lines, etc., to meet the current large-scale development of civilian communications equipment needs. (A) amplitude-frequency characteristics of the method of measuring the impedance measurement line, the main line through the standing wave ratio measurement obtained. That is, when the signal source frequency is fixed, the moving probe is used to measure the voltage distribution on the main line to obtain the VSWR. Our approach is to fix the position of the measuring point on the main line, change the source frequency, and obtain a similar result