Date of Award

3-19-2009

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

First Advisor

Michael J. Havrilla, PhD

Abstract

This research presents the analysis and verification of a stripline designed by Air Force Research Laboratory for use in measuring the electrical properties of materials at low frequencies and high temperature. It is designed to operate in the TEM mode up to 4 Ghz and have a characteristic impedance of 50 ohms. A full wave base method is used to analyze the structure. The parallel plate waveguide dyadic Green's function is developed for a current immersed in a PEC parallel plate environment. It is used to formulate a pair of coupled electric field integral equations (CIE). These CIEs are solved through a computationally efficient entire-domain method of moments (MoM) technique. Numerical efficiency is gained through employing Chebsyshev polynomials of the first and second kind as testing and expansion functions. These efficient expansion and testing function sets require as few as three expansions for accurate results. Further numerical efficiencies are gained by taking advantage of transverse electromagnetic propagation properties to develop a specialized TEM integral equation reducing the number of integrations performed from 2N2+N to N2. An expression for the characteristic impedance is developed using the MoM results. The characteristic impedance is calculated for various degrees of center conductor miss alignment.

AFIT Designator

AFIT-GE-ENG-09-10

DTIC Accession Number

ADA500151

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