Line-Integral Representation for the PO Field Scattered by a Faceted Object, Illuminated by a Complex Point Source

In this paper a line integral representation of the PO scattered field is presented, which provides an effective modeling tool for the scattering by a complex scenario, represented in terms of faceted surfaces, in which actual antennas operate, efficiently represented via complex source expansion. The present formulation overcomes the numerical impairments of similar past results, by introducing a novel Incremental Geometrical Optics (IGO) contribution, which allows the regularization of the integrand of the line integration which thus becomes suitable for its efficient numerical calculation, drastically reducing the computation effort with respect to the standard surface PO integral. Furthermore, IGO preserve s the physical rayinterpretability of the integrand which is the basis for extending the applicability range of the tool vi a standard ray heuristic approximation, or its analytical continuation for the treatment of complex sources.