Scattering from a coated curved surface of varying thickness with application to nondestructive evaluation

The extinction pulse (E-pulse) has been used to diagnose changes in the electromagnetic parameters of a coated surface. The E-pulse technique has been successfully applied to a flat surface and constant curve surface with a constant thickness. An important extension is to apply the E-pulse technique to a surface with a varying thickness and curvature.; The coated surface investigated in this thesis is an elliptical metallic cylinder with a circular dielectric coating. An incident plane wave with TEz and TMz polarization is reflected off the coated cylinder having either a vertical or a horizontal major axis. The monostatic results generated in the frequency domain are transformed using am FFT, providing the time domain data for convolution with the E-pulse.; The E-pulse for a planar coated surface is applied to the data obtain for the elliptical metallic core with a circular dielectric coating. The placement of the major axis and the type of polarization chosen has a greater impact on the E-pulse Discrimination Number (EDN) as the radius decreases in size.