IMAGE THEORY FOR THE SOFT AND HARD SURFACE

Image theory is developed for sources above a planar anisotropic bound ary surface, often labeled as soft and hard surface, realizable with t uned corrugations so that the electric and magnetic field components a long the corrugations become zero. The idea pursued is to decompose th e original source in two components, giving rise to fields TE and TRI to the direction of corrugation, respectively. This makes the problem split into two parts for which the image sources can be easily constru cted. For an electric dipole, the image turns out to consist of a rota ted dipole in the mirror image point plus a transmission-line current source parallel to the corrugations, The theory is readily applicable to various microwave problems involving a planar soft and hard surface .