Complex permittivity measurements using TE/sub 11p/ modes in circular cylindrical cavities

摘要

Characterization of complex permittivity has been performed using circular cylindrical cavities. For this reason, perturbed TE/sub 11p/ odd modes have been analyzed. Closed-form expressions are given for the relative dielectric constant /spl epsiv//sub r/ and the loss tangent tan/spl delta/ for an inserted rectangular specimen. Experimental results are presented for the verification of the derived formulas. The use of circular cylindrical cavities instead of rectangular ones offers the advantage of higher Q factors and, therefore, higher accuracy.