An electromagnetic analysis of a coaxial cavity cell

Author

Green, A.D. ; Williamson, A.G.

Author_Institution

Image & Sensing Team, Ind. Res. Inst., Auckland, New Zealand

Volume

48

Issue

6

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

1056

Lastpage

1061

Abstract

An electromagnetic analysis of a coaxially-excited coaxial cavity is presented. Equations are derived for the fields inside the cavity, the currents on the conducting walls, and for the cavity admittance. An accurate approximate method for calculating the losses in the cavity walls and the effect on the admittance is also reported. Experimental results are presented which demonstrate the accuracy of the theory. This work represents the first step in the development of a technique to employ the coaxially excited coaxial cavity as a cell for the measurement of the permittivity of homogeneous materials over a wide frequency range

Keywords

cavity resonators; dielectric measurement; electric admittance measurement; electromagnetic field theory; losses; waveguide theory; accurate approximate method; cavity admittance; coaxial cavity cell; coaxially excited coaxial cavity; conducting walls; electromagnetic analysis; permittivity of homogeneous materials; power losses; Admittance; Coaxial components; Dielectric losses; Dielectric measurements; Electromagnetic analysis; Electromagnetic measurements; Electromagnetic waveguides; Frequency measurement; Permittivity measurement; Resonant frequency;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.816113

Filename

816113