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This paper considers several target structures containing edges which are useful to validate computer codes developed to the purpose of detecting hidden mines and Unexploded Ordnance (UXO). In particular, we investigate the capabilities of the singular basis functions' approach in Computational Electromagnetics for formulations based on surface integral equations. We compare the solutions obtained...
The paper summarizes the research results obtained on numerical modeling of the diffraction effects due to abrupt material or geometrical discontinuities of electromagnetic structures. High order polynomial vector bases are often used to numerically model EM problems, but polynomial approximations spoil the convergence properties of the used finite method whenever the physical quantities have singular...
A new technique for machine precision evaluation of singular and nearly singular potential integrals with 1/R singularities is presented. The numerical quadrature scheme is based on a new rational expression for the integrands, obtained by a cancellation procedure. In particular, by using library routines for Gauss quadrature of rational functions readily available in the literature, this new expression...
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