Ultra-wideband radar imaging experiment for verifying super-resolution in nonlinear inverse scattering

Abstract

An experimental verification of the super-resolution phenomenon in nonlinear inverse scattering imaging is presented. The experimental data are processed with the distorted Born iterative method (DBIM) and shows that it can resolve features smaller than the half-wavelength dictated by the Rayleigh criterion. DBIM can recover information on the backside of the penetrable scatterer even though scattering data are collected only from limited viewing angles on the front side of the scatterer. This is also a consequence of extracting information from the multiple scattering physics inherent in the data collected, and is not possible in inverse scattering method where only single scattering physics is assumed.