Novel Extension of Full-Polarimetric Bistatic Scattering Modeling of Canonical Scatterers for Radar Recognition

In radar target recognition, the canonical scatterer model (CSM) serves as an effective alternative to the scatterer center model (SCM) for efficiently characterizing electromagnetic (EM) scattering properties of complex targets. Based on physical optics (PO) and the stationary phase method (SPM), this paper analytically derives the novel extension of the CSM for six canonical scatterers: plate, dihedral, trihedral, cylinder, cone, and sphere. The proposed polarization-dependent framework isolates the polarimetric response from CSMs’ intrinsic geometries, reducing the full-polarimetric matrix to an explicit function exclusively governed by bistatic radar spatial configurations. Experimental validation demonstrates mean relative percentage errors (MRPEs) in radar cross section (RCS) of 0.3%, 2%, 2.6%, 3%, 6%, and 7%. This model constitutes a foundational prototype for scattering dictionaries addressing both forward and inverse EM scattering problems, possessing significant practical utility in radar target recognition and image interpretation.