Design of a Grooved Circular Cavity for Dielectric Substrate Measurements in Millimeter Wave Region

Takashi SHIMIZU  Zhewang MA  Yoshio KOBAYASHI  

IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.8   pp.1715-1720
Publication Date: 2003/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
dielectric substrate measurement,  cut-off circular waveguide method,  millimeter wave,  

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A grooved circular cavity is designed for the millimeter wave measurements of dielectric substrates. The grooves are introduced to separate the degenerate TE01p and TM11p modes in circular cavities. A rigorous mode-matching method is used to investigate the influence of grooves on both the TE01p and TM11p modes. The dimensions of the grooves are determined from the numerical results. Comparative experiments of circular cavities with and without grooves validate the design method.