Numerical and experimental results of a microwave noncontact, nondestructive detection and evaluation of disbonds and thickness variations in stratified composite media are presented. The aperture admittance characteristics of a flange mounted rectangular waveguide radiating into a layered, generally lossy dielectric media backed or unbacked by a conducting sheet is modeled. The theoretical implementation is based on a Fourier transform boundary matching technique to construct the field components in each medium, coupled with a stationary form of the terminating aperture admittance of the waveguide. The model can serve as a reliable test bed for real-time examination of layered composite media. Experimental results for several cases are presented which show good agreement with the theoretical findings. This is a versatile technique for near-field in situ interrogation of stratified composite media which provides for high resolution measurements

Meeting Name

2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting


Electrical and Computer Engineering

Keywords and Phrases

Fourier Transform Boundary Matching Technique; Fourier Transforms; Aperture Admittance Characteristics; Conducting Sheet Backing; Delamination; Disbond; Field Components; Flange Mounted Rectangular Waveguide; High Resolution Measurements; Layered Generally Lossy Dielectric Media; Microwave Measurement; Microwave Noncontact Examination; Nondestructive Detection; Nondestructive Testing; Real-Time Examination; Stratified Composite Media; Thickness Measurement; Thickness Variation; Composite Testing and Evaluation; Electromagnetic Formulation-Probe Development and Antennas

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Document Type

Article - Journal

Document Version

Final Version

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© 1994 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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