Improvement of the Relative Permittivity Evaluation with a Whispering-Gallery Mode Dielectric Resonator Method

Hajime TAMURA  Yoshinori KOGAMI  Kazuhito MATSUMURA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.8   pp.1665-1671
Publication Date: 2003/08/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
millimeter wave,  Whispering-Gallery mode,  complex permittivity evaluation,  mode-matching method,  

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Summary: 
Whispering-Gallery mode resonator method has been presented for complex permittivity evaluation of low loss dielectric materials in millimeter wave region. As a problem, it has been found that the evaluation error slightly dependens on the frequency for a sample. It comes from approximated analysis which is used in the procedure. In this paper, a mode-matching method is applied to this evaluation technique to have improvement of the measrued results. It is confirmed experimentally that reliability of the presented method is improved for the millimeter wave permittivity measurement.