DocumentCode
1294413
Title
The measurement of the permittivity of sheet materials at microwave frequencies using an evanescent waveguide technique
Author
Kumar, Akhileshwar ; Smith, D. Geoffrey
Author_Institution
Dept. of Electronic Sci. & Telecommunications, Univ. of Strathclyde, Glasgow, UK
Issue
3
fYear
1976
Firstpage
190
Lastpage
193
Abstract
Based on a method first proposed by Barlow (1962) the paper discusses how the complex permittivity of a sheet material can be determined by measuring the Q and frequency change produced by a sample when it is placed in a circular evanescent waveguide which is coupled to a resonant cavity. The method appears to be satisfactory for dielectric materials with loss tangents above about 0.01. Measurements on two mixtures of polystyrene and carbon, taken at 9 GHz, are reported.
Keywords
microwave measurement; permittivity measurement; Barlow´s method; Q-factor measurement; complex permittivity; evanescent waveguide technique; frequency change measurement; loss tangents above 0.01; measurements at 9 GHz; permittivity at microwave frequencies; permittivity measurement; permittivity of sheet materials; resonant cavity coupled to waveguide; Cavity resonators; Couplings; Frequency measurement; Permittivity; Permittivity measurement; Q measurement;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/TIM.1976.6312344
Filename
6312344
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