Electromagnetic scattering by a dielectric body with arbitrary inhomogeneity and anisotropy

The scattering problem for a dielectric body is formulated in terms of the electric field integral equation where the scatterer is of general shape, inhomogeneity, and anisotropy. On applying the pulse-function expansion and the point-matching technique, the integral equation is solved using an efficient procedure involving the conjugate-gradient method and the fast Fourier transform (FFT). The solution procedure runs parallel to that of the two-dimensional case previously presented by the author (see ibid., vol.AP-35, p.1418-25, Dec. 1987). Most of the work presented involves generalizing two-dimensional Green´s function and operations into corresponding three-dimensional ones