Parallel-Resonance Methods for Precise Measurements of High Impedances at Radio Frequencies and a Comparison with the Ordinary Series-Resonance Methods

Proceedings of the Institute of Radio Engineers Pub Date : 1938-12-01 DOI:10.1109/JRPROC.1938.228188

D. B. Sinclair

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引用次数: 8

Abstract

Two parallel-resonance methods are described which determine primarily the parallel conductance of a parallel-tuned circuit. They are most useful for measuring relatively low admittances (high impedances). Since they are duals of the reactance- and resistance-variation methods, they have been named the susceptance- and conductance-variation methods. These parallel-resonance methods are compared with the series-resonance methods with respect to range and possible sources of error. It is pointed out that, for substitution measurements, tight coupling to a constant-frequency power source need not introduce errors in measurements with either series- or parallel-resonance methods. The errors caused by residual inductance and metallic and dielectric loss in the standard condenser are discussed and numerical examples given. A precise method of interpreting resonance-curve data is presented. Experimental results are listed for measurements of high resistances by the susceptance-variation method.

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射频高阻抗精确测量的并联谐振方法及其与普通串联谐振方法的比较

描述了两种并联谐振方法，它们主要确定并联调谐电路的并联电导。它们最适用于测量相对低导纳(高阻抗)。由于它们是电抗变分法和电阻变分法的对偶，因此被称为电纳变分法和电导变分法。在误差范围和可能的误差来源方面，将这些并联谐振方法与串联谐振方法进行了比较。指出，在替代测量中，与恒频电源的紧密耦合不会给串联或并联谐振测量带来误差。讨论了标准电容器中残余电感、金属损耗和介质损耗引起的误差，并给出了数值算例。提出了一种解释共振曲线数据的精确方法。给出了用电纳变分法测量高电阻的实验结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the Institute of Radio Engineers

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