On polarization diversity gain in short range UWB-Radar object imaging

In this paper a 2D bi-static, fully-polarimetric Ultrawideband (UWB) imaging system is presented. The exploitation of polarization diversity provides supplemental information compared to mono-polarized sensing techniques. This polarization diversity gain enhances the efficiency of target classification according to information contained in the back-scattered signal. Hence, additional characteristics of targets such as form, details of surface structure and orientation are gathered, which may remain invisible for mono-polarized systems. An experimental validation is carried out based on complex test objects, an M-sequence Radar device and new dual-orthogonal polarized antennas.