Ray-field scattered by polygonal reflecting intelligent surfaces

Abstract

A method is presented here for ray-representation of the scattered field from polygonal, metasurface (MTS)-based Reflective Intelligent Surfaces (RIS). The method is based on the use of an infinite periodic problem for finding the current distribution over the RIS aperture, which is eventually windowed for calculating the radiated field. Stokes theorem is applied on the windowed radiating aperture to find a closed form representation of the radiated field in terms of rays. The formulation developed here is in the far zone; it is however suggested how it can be extended to the Fresnel region by introducing proper Fresnel transition functions