Multi-resolution iterative inversion of real inhomogeneous targets : Testing inversion algorithms against experimental data: Inhomogeneous targets

This paper presents a review of the reconstruction results obtained from the inversion of experimental data provided by the Institute Fresnel (Marseille, France) and concerned with inhomogeneous dielectric targets and hybrid configurations, where dielectric and metallic cylinders are present in the scenario under test. The iterative multi-scaling approach (IMSA) is applied for addressing the inversion of scattering data in order to effectively exploit the available information through a multi-step reconstruction procedure, which adaptively allocates a set of unknown coefficients, related to the dielectric distribution'in the investigation area, on the basis of the information collected during the iterative process. The obtained results confirm the effectiveness of such an iterative multi-resolution strategy in dealing with complex scatterers already demonstrated in synthetic experiments.