Three-dimensional approach to multivision microwave imaging

In the previous paper, the authors proposed a two-dimensional approach (see Caorsi et al., IEE Trans. Microwave Theory Tech., MTT-38, p.981, 1990) to microwave imaging based on a moment-method solution and on the use of a pseudoinversion algorithm to face the ill-conditioning of the inverse scattering formulation. An extension of that approach to a multivision process was also presented (see Caorsi et al., 1991). In the present paper, starting from that formulation, they develop a multivision inverse scattering numerical solution to three-dimensional problems related to strongly scattering vector configurations. The approach is based on the solution (by means of Green's dyadic tensor) to a set of Helmoltz vector equations whose source terms are equivalent current densities. The Fredholm equations are numerically inverted, using the moment method, for different angles of illumination, and the dielectric features are related to the reconstruction equivalent current densities via the solution to a direct scattering equation for the scattering region.