A UTD SOLUTION FOR THE DIFFRACTION AT AN EDGE IN A PLANAR ANISOTROPICIMPEDANCE SURFACE - OBLIQUE-INCIDENCE CASE

Electromagnetic scattering of plane waves obliquely incident on the ed ge of a planar anisotropic impedance surface is analyzed. A rigorous a nalytical solution, obtained by applying a procedure similar to that o riginally proposed by Maliuzhinets, is derived with reference to a cou ple of particular geometrical configurations. These latter are relevan t to the case in which the anisotropic impedance surface is truncated to originate on either the edge of a half-plane, the other face being perfect electric conductor, or on a planar junction between the same a nisotropic surface and a perfectly conducting plane. The exact integra l representation for the total field is then asymptotically evaluated in the context of the uniform geometrical theory of diffraction (UTD). The particular kind of anisotropic surface impedance considered for t he loaded face is suitable for modeling corrugated surfaces or strip-l oaded grounded dielectric slabs, when the direction of either corrugat ions or strips is perpendicular to the edge. (C) 1996 John Wiley & Son s, Inc.