MEASUREMENT OF MATERIAL PROPERTIES WITH A TUNABLE RESONANT-CAVITY

被引：54

作者：

KAJFEZ, D

GUNDAVAJHALA, A

机构：

[1] Department of Electrical Engineering, University of Mississippi, University

来源：

ELECTRONICS LETTERS | 1993年 / 29卷 / 22期

关键词：

DIELECTRIC MEASUREMENT; CAVITY RESONATORS;

D O I：

10.1049/el:19931289

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A tunable resonant cavity is used to measure the complex permittivity of dielectrics and the surface conductivity of metals with high precision. The analytical approximations, traditionally used in the cavity perturbation techniques, have been replaced with a rigorous numerical solution of the electromagnetic field distribution inside the rotationally symmetric cavity filled with inhomogeneous dielectrics. The measured values of the unloadedQ factor are compared with the numerically computed values over the tuning range. The least-squares data fitting procedure yields simultaneously the values of the loss tangent and the surface conductivity, and their standard deviations.

引用

页码：1936 / 1937

页数：2

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