Electromagnetic Scattering from Dielectrically Coated Axisymmetric Objects Using the Generalized Point-Matching Technique

Abstract

This paper presents a general and systematic numerical technique based upon the generalized point-matching technique (GPMT) for analyzing problems of plane electromagnetic (EM) scattering from three-dimensional bounded objects consisting of (or modelled by) an arbitrarily shaped axisymmetric perfectly conducting or dielectric obstacle embedded in an arbitrarily shaped dielectric body of revolution and arbitrarily disposed with respect to the propagation direction of an arbitrarily polarized incident electric field vector. The GPMT has the chief advantage of being conceptually simple and is amenable to solution by numerical techniques without excessive analytical and/or programming effort. The treatment may be validly applied to scatterers whose boundary surfaces must have no sharp corners or edges which will introduce a discontinuity in the direction of the unit vector normal to the core and/or outer coat surfaces. However, it should be pointed out that when applicable, the method is remarkably robust and capable of providing highly accurate numerical modelling predictions for the full-vector EM wave interactions with a large variety of arbitrarily shaped two-layered structures.