Title :
Complex permittivity measurements using TE11p modes in circular cylindrical cavities
Author :
Zinal, Sherko ; Boeck, Georg
Author_Institution :
Microwave Eng. Lab., Tech. Univ. of Berlin, Germany
fDate :
6/1/2005 12:00:00 AM
Abstract :
Characterization of complex permittivity has been performed using circular cylindrical cavities. For this reason, perturbed TE11p odd modes have been analyzed. Closed-form expressions are given for the relative dielectric constant εr and the loss tangent tanδ 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.
Keywords :
Q-factor; dielectric materials; microwave measurement; permittivity measurement; Q factors; TE11p modes; cavity perturbation method; circular cylindrical cavity; complex permittivity measurements; dielectric constant; dielectric materials; loss tangent; Cavity perturbation methods; Dielectric constant; Dielectric losses; Dielectric materials; Dielectric measurements; Dielectric substrates; Frequency measurement; Permittivity measurement; Resonance; Resonant frequency; Cavity perturbation method; complex permittivity measurements; dielectric materials;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.848094
