Plane wave scattering by slots on a ground plane in the case of oblique incidence and arbitrary polarization

Plane wave scattering by single or double slots is investigated in the case of oblique incidence and arbitrary polarization. To this end, systems of singular integral-integro-differential equations of the first kind are constructed and discretized by a Krilov-Bogolubov method. Several tests and extensive comparisons with available results were made in order to validate the numerical results. Surface magnetic current densities, angular radiation pattern, equivalent surface impedance and the radar cross sections were calculated for different geometrical parameters of the structure and space parameters.