The detection sensitivity optimization of air disbond in layered dielectric composites, using an open-ended rectangular waveguide, is studied both theoretically and experimentally. The sensitivity of the disbond detection is strongly influenced by the proper choice of parameters such as the operating frequency and the layered composite geometry (conductor hacked or terminated by an infinite half-space of air). The capability of optimizing the measurement system parameters to detect and estimate the thickness of a disbonded layer independent of some changes in the thickness of the dielectric coating is also demonstrated. The impact of the parameters influencing detection optimization is theoretically investigated and then experimentally verified.


Electrical and Computer Engineering

Keywords and Phrases

Air Disbond; Detection Optimization; Detection Sensitivity Optimization; Dielectric Measurement; Dielectric Thin Films; Disbonded Layer; Infinite Half-Space; Layered Composite Geometry; Layered Dielectric Composites; Layered Dielectrics; Microwave Detection Optimization; Microwave Measurement; Nondestructive Testing; Open-Ended Rectangular Waveguide; Optimisation; Rectangular Waveguides; Thickness Measurement; Varying Thickness; Composite Testing and Evaluation; Electromagnetic Formulation-Probe Development and Antennas

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

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© 1995 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.