Using half-plane solutions in the context of MM for analyzing large flat structures with or without resistive loadings

The size of the scatterers that can be analyzed using the conventional method of moments (MM) is limited to only a few wavelengths, due to large storage requirements in the computer. One way to circumvent this problem is to use techniques that temper the growth in the size of the impedance matrix to a reasonable level even as the scatterer becomes large in terms of the wavelength. It is shown that this can be done by choosing an appropriate set of entire or semi-entire domain basis functions that incorporate the actual physics of the scattering phenomenon. The functional forms of the basis functions are obtained either from an exact or an asymptotic solution to certain canonical problems. As an example, the problems of scattering from perfectly conducting or resistively loaded flat strips and plates are solved by utilizing the exact or asymptotic solutions to half-plane problems as basis functions