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Use of Microwaves for Nondestructive Material Inspection

Published online by Cambridge University Press:  10 February 2011

B. R. Hokkanen  and
J. F. Lindsey III
B. R. Hokkanen
Affiliation:
Department of Technology, Southern Illinois University at Carbondale Carbondale, IL 62901-6603
J. F. Lindsey III
Affiliation:
Department of Technology, Southern Illinois University at Carbondale Carbondale, IL 62901-6603
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Abstract

Wideband S-parameter measurements have been used to investigate the properties of electrically non-conductive materials using a vector network analyzer. Using S21 scattering parameters, amplitude and phase shift measurements were taken for a variety of both homogeneous and heterogeneous materials. With these initial S-parameter measurements as a reference, surface defects were modeled on the test samples and the S-parameter measurements were reevaluated. The effect of varying levels of moisture absorption in certain materials was also investigated. The results of this study indicate that there is indeed potential for the use of a vector network analyzer as a nondestructive testing tool to evaluate the structural integrity and/or moisture content of electrically non-conductive materials through the transmission of microwave energy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 59
Copyright
Copyright © Materials Research Society 1996

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