Resonances of dielectrically coated conducting spheres and the inverse scattering problem

The resonance theory of scattering, recently developed for the diffraction of acoustic and elastic waves, is applied here to radar scattering from penetrable targets, with a view toward solving the inverse scattering problem. For the example of a dielectrically coated conducting sphere, it is shown that the thickness and the dielectric constant of the target can be obtained from a determination of the spacing and of the widths of the scattering resonances in the radar echo returns.