Efficient Solution of the Multiple Incidence Electromagnetic Scattering Problem for a Metallic Object Over Ultra-Wideband

The frequency signature of the scattered fields from an object remains a crucial element for the proper identification and classification of the same. As a solution to the identified issues with commercial software packages for solving the scattered fields from metallic scatterers for multiple incident angles at once, this paper proposes an efficient numerical model to solve for the same in an Ultra-Wideband (UWB) regime. The paper begins with the theoretical formulation of the integral equations governing the electromagnetic scattering phenomenon. We then discretize and solve for the surface current densities. Finally, the results of the numerical model are compared with a commercial package, showing a strong statistical agreement characterized by a relatively low mean and low standard deviation for the modeling error. A similar conclusion can be drawn from the comparison between the numerical model and experimental results, further validating the accuracy and reliability of the proposed model.