Electromagnetic Model of Reflective Intelligent Surfaces

An accurate and simple analytical model for the computation of reflection amplitude phase Reconfigurable Intelligent Surfaces is presented. The based on a transmission-line circuit representation RIS which takes into account physics behind structure including effect all relevant geometrical electrical parameters. proposed allows to take incidence angle, mutual coupling among elements interaction periodic surface with ground plane. It shown that approach design physically realisable without recurring onerous electromagnetic simulations. aims at filling gap between assisted communications algorithms physical implementation issues determine realistic performance these surfaces.