Electromagnetic Modeling of the Interaction of Cracks in Metallic Surfaces with Open-Ended Waveguides Using an Equivalent Magnetic Current
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
In previous research a mode matching approach was used to describe the electromagnetic properties of a system formed by an open-ended waveguide and a crack [1]. A more versatile formulation for evaluating the electromagnetic properties in such a system is possible by using a moment solution approach, which eliminates the necessary distinction between empty, filled and finite length cracks, independent of the relative position of the crack within the probing waveguide aperture. The reflection coefficient at the waveguide aperture can be expressed with a generalized scattering matrix, thus making this approach versatile for any incident excitation field [2].