Electromagnetic Inverse Scattering by a Numerical Integral Equation Solution

Electromagnetic inverse scattering for microwave imaging applications is the topic dealt with in this paper. We assess the potentialities of an integral-equation approach based on a moment-method numerical solution of the first-order integral equation derived from the Helmoltz equations in terms of Green´s dyadic function. The results of numerical simulations are reported for both two- and three-dimensional configurations. The values of the reconstructed equivalent current density and the relative dielectric permittivity are given. Finally, the effects of using a pseudoinverse solution are evaluated, even in the case of noisy environments.