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FDTD Simulation of an Open-Ended Metallized Ceramic Probe for Broadband High-Temperature Dielectric Properties Measurements

Published online by Cambridge University Press:  15 February 2011

Shane Bringhurst ,
Magdy F. Iskander  and
Paul Gartside
Shane Bringhurst
Affiliation:
University of Utah, Electrical Engineering Department, Salt Lake City, Utah, 84112
Magdy F. Iskander
Affiliation:
University of Utah, Electrical Engineering Department, Salt Lake City, Utah, 84112
Paul Gartside
Affiliation:
University of Utah, Electrical Engineering Department, Salt Lake City, Utah, 84112
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Abstract

Open-ended coaxial probes have been used in broadband dielectric properties measurements for several years. To aid in the ongoing numerical simulation and microwave sintering research at the University of Utah, we have found it necessary to make dielectric properties measurements up to temperatures as high as 1400 °C. The available cavity perturbation techniques were unsuitable in this application due to their relatively narrow band, and the available metal probes are also unsuitable due to the differential thermal expansions of the inner and outer conductors, which makes it difficult to carry out accurate and on-line calibration procedures for these probes.

To help us achieve both broadband and high-temperature dielectric properties measurements, we have developed a new metallized ceramic coaxial probe. The detailed design of this probe is described and the metallization procedure is discussed.

Also to optimize the design of the probe and in particular to increase the penetration of fields in samples under test and hence improve the probe sensitivity to variation in properties of a larger class of materials, and to determine the required minimum thickness of various samples to obtain accurate results, we modeled and simulated the probe performance using the Finite-Difference Time-Domain (FDTD) method. Results from the FDTD simulation are presented and some guidelines that may be used to optimize the design of the probe are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 347: Symposium O – Microwave Processing of Materials IV , 1994 , 221
Copyright
Copyright © Materials Research Society 1994

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References

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