TM scattering by a resistive card extension to a half plane

A characterization of scattering by a metallic half-plane loaded with a resistive strip extension is presented. The aim is to derive simple and efficient solutions not associated with extensive computational demands. Three different solution methodologies are used. The first is a moment method formulation which computes the exact current on a strip extension by utilizing the metallic half plane Green´s function. A high-frequency solution is also used which follows the formal procedure outlined by M.I. Herman and J. L. Volakis (1987), which includes up to third-order diffraction (and surface wave) contributions. Finally, an approximate low-frequency solution is developed by introducing a physical basis function for the currents. The latter two solutions are found to be complementary and a combination of them may be used in place of the rigorous numerical solution.<>