Title :
Multi-Frequency Measurements of Complex Permittivity of Dielectric Plates using Higher-Order Modes of a Balanced-Type Circular Disk Resonator
Author :
Kawabata, Hirokazu ; Hasuike, Ken-ichi ; Kobayashi, Yoshio ; Ma, Zhewang
Author_Institution :
Gunma Ind. Technol. Center
Abstract :
A multi-frequency measurement method is proposed to determine the complex permittivity of dielectric plates. In these measurements, a balanced-type circular disk resonator excited in the center by coaxial cables is used to excite selectively only the TM0m0 modes having different values of integer m. The frequency dependence of the complex permittivity of the plates is obtained from the measured values of the resonant frequency and the unloaded Q of the TM0m0 modes for only one circular disk resonator. The numerical results based on the rigorous analysis are presented to explain the effects of the fringing field and coupling holes including coaxial cable. The usefulness of this method is verified by the measured results of polyolefin and PTFE plates
Keywords :
Galerkin method; coaxial cables; dielectric bodies; permittivity measurement; strip line resonators; PTFE plates; circular disk resonator; coaxial cables; dielectric plates; permittivity measurement; Coaxial cables; Conductors; Dielectric loss measurement; Dielectric measurements; Dielectric substrates; Frequency dependence; Frequency measurement; Magnetic field measurement; Permittivity measurement; Resonant frequency; Coaxial cable; Ritz-Galerkin method; dielectric material; disk resonator; permittivity measurement;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281355
