A New Dihedral Reflector for Simultaneous Polarimetric Calibration and Background Clutter Extraction

In this paper, a new diamond-shaped dihedral reflector is proposed for simultaneous polarimetric calibration and background clutter extraction in target polarimetric scattering matrix (PSM) measurement. Traditional rectangular and triangular-shaped dihedral reflectors rotating with an integer multiple of 180° rotation around the radar line of sight (LOS) have relatively high biased components due to the long line connecting the two right-angled plates. Dihedral reflector with two diamond-shaped right-angled plates and a short connecting line demonstrates much better characteristic. Simulations are presented to show the essential improvement of performance using the proposed dihedral design.