Based on an approximate dyadic diffraction coefficient, equivalent currents (ECs) are derived for computing the scattering by a finite length impedance wedge of arbitrary angle. The derived equivalent currents are implemented in a standard general purpose PTD (Physical Theory of Diffraction) code and results are presented demonstrating the accuracy of the formulation for a number of impedance and (dielectrically) coated structures. These include typical shapes such as plates, finite length cones and cylinders which have been partially or fully coated.
