Electromagnetic imaging of dielectric targets

The paper deals with the problem of reconstructing dielectric inhomogeneities from scattering data taken for different aspect angles and wavelengths. Starting with the Born approximation, the observable quantities turn out to be simply related to the Fourier transform of the searched object-function, and the same spatial frequency component may be obtained via different mapping configurations (redundant measurements). The exact scattering can be represented by the sum of the Born term and an additional term stemming from coupling between different parts of the scatterer. Two concepts are proposed, to take the latter term into account. The first uses values obtained from redundant measurements to reduce the influence of the coupling term. In the second concept the coupling is considered by means of an approximate integral equation.