An Algorithm for Analysis of Reflected and Diffracted Fields from a Polyhedron Type of Target above a Plane-Ground

This paper is concerned with an algorithm for analyzing reflected and diffracted fields from a polyhedron type of target above a plane-ground. First, the numerical method for computing electromagnetic field is introduced. In the electric field computation, we use the conventional Fresnel reflection coefficient for reflection and the Fresnel function for diffraction which can precisely solve the diffracted field. Then an algorithm for searching rays between a transmitter and a receiver via a target is proposed. In that method, all the diffracted rays in LOS region from both transmitter and receiver are included when the electric field intensities are calculated. And reflected fields are also included in that solution in case they exist at the surface of a target. Finally, some numerical examples are shown.