Extraction of errors in the physical optics analysis of dipole wave scattering by a finite size anisotropic reflector

This paper verifies the accuracy of physical optics (PO) and discusses the mechanism of its errors' extraction in the analysis of dipole wave scattering by the finite strip array placed on the grounded dielectric disk. The numerical results are compared with the experimental ones for the vertical dipole antenna over the anisotropic reflector. To enhance the accuracy of calculations, especially in the plane where the discrepancy of numerical results and measurements increases, the Green's function method has been applied to analyze the wave scattering from grounded dielectric slab and excitation of slab's surface modes.