Errors in Dielectric Measurements Due to a Sample Insertion Hole in a Cavity

The measurement of complex permittivities of isotropic media at microwave frequencies is performed with high precision by means of cylindrical cavity resonators. However, a hole in the cavity wall, for inserting the sample causes a frequency pulling of the resonator, which in turn introduces an erro...

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Bibliographic Details
Published inI.R.E. transactions on microwave theory and techniques Vol. 8; no. 6; pp. 650 - 653
Main Authors Bussey, H.E., Estin, A.J.
Format Journal Article
LanguageEnglish
Published 01.11.1960
Subjects
Cavity resonators
Dielectric constant
Dielectric materials
Dielectric measurements
Frequency measurement
Microwave measurements
Permittivity measurement
Plugs
Solids
Wavelength measurement
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Summary:The measurement of complex permittivities of isotropic media at microwave frequencies is performed with high precision by means of cylindrical cavity resonators. However, a hole in the cavity wall, for inserting the sample causes a frequency pulling of the resonator, which in turn introduces an error in the measured dielectric constant. These effects are measured, and with perturbation theory as a guide, correction factors are developed.
ISSN:0097-2002
2331-088X
DOI:10.1109/TMTT.1960.1124812