High-frequency EM scattering by edges in artificially hard and soft surfaces illuminated at oblique incidence

Uniform high-frequency expressions describing the field scattered by edges in anisotropic impedance surfaces illuminated at oblique incidence are prov ided. The specific anisotropic impedance boundary condition considered here exhibits a vanishing surface impedance along a principal anisotropy axis a nd an arbitrary one in the orthogonal direction. In certain circumstances, this tensor surface impedance may represent an accurate model for describin g the scattering properties of artificially hard and soft surfaces, In orde r to simplify the analysis but without losing pertinence with real problems , in all canonical configurations we consider a face of the wedge to be per fectly conducting. The anisotropic impedance face is characterized by a ten sor surface impedance with the principal anisotropy axes parallel and perpe ndicular to the edge.