Microwave detection optimization of disbond in layered dielectrics with varying thickness

Author

Ganchev, Stoyan I. ; Qaddoumi, Nasser ; Ranu, Emarit ; Zoughi, Reza

Author_Institution

Appl. Microwave Nondestructive Testing Lab., Colorado State Univ., Fort Collins, CO, USA

Volume

44

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

326

Lastpage

328

Abstract

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

Keywords

dielectric measurement; dielectric thin films; microwave measurement; nondestructive testing; optimisation; rectangular waveguides; thickness measurement; air disbond; detection optimization; detection sensitivity optimization; disbonded layer; infinite half-space; layered composite geometry; layered dielectric composites; layered dielectrics; microwave detection optimization; open-ended rectangular waveguide; varying thickness; Coatings; Conductors; Dielectric measurements; Electromagnetic heating; Geometry; Inspection; Plasma measurements; Rectangular waveguides; Thickness measurement; Waveguide theory;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.377843

Filename

377843