Hybrid solutions for scattering from large bodies of revolution with material discontinuities and coatings

A formulation is presented for electromagnetic scattering from electrically large convex bodies of revolution (BOR´s) having material discontinuities. Hybrid solutions are developed for the resulting integral equations, using the method of moments (MM) technique together with the Fock or physical optics (PO) Ansatz for large convex conducting bodies where the use of the MM approach by itself is computationally impractical. The analysis is developed for arbitrary oblique illumination. The solutions are shown to yield accurate results for nonspecular, surface wave dominated scattering. The method is illustrated for spheres, cylinders and conespheres having material discontinuities. Generalization of this formulation applies also to graded, nonuniform lossy coatings on BOR scatterers.