EXCITATION EFFICIENCY OF SURFACE WAVES OVER CORRUGATED METAL AND DOUBLY CORRUGATED METAL AND IN DIELECTRIC SLABS ON A GROUND PLANE

摘要

Corrugated metal (and "doubly corrugated metal") is an anisotropic boundary which supports only a hybrid surface wave mode in directions other than parallel or perpendicular to the corrugations. The mode phase velocity is a function of direction. To determine the excitation efficiency of these modes a three dimensional analysis is performed generalizing the results of Cullen [1] and utilizing the author’s previous work [2].nThe surface waves are shown to possess many of the properties of plane waves in a two dimensional anisotropic medium - notably that the energy propagation is radial and not generally normal to the wave fronts.