Polarization characteristics and controllability mechanism of passive scattering elements

Polarization feature is one of the important features of radar targets,which has been used in many fields. In this paper,the grid models of some typical foreign moving targets are con-structed on the simulation platform,such as glider,cruiser,fixed wing aircraft,and rotorcraft. The electromagnetic scattering characteristics of the moving platforms under the incidence of circular polarization waves are calculated. The typical polariza-tion characteristics which the orthogonal and in-phase compo-nents have in the echoes are analyzed and proved. Based on the polarization scattering matrix (PSM) theory,from the point of view of the physical reproduction,the technical status quo that the existing technical approaches are difficult to realize the pas-sive simulation of polarization characteristic of the target is sum-marized. To solve this problem,combined with the vector syn-thesis law,the realization mechanism of controllable polarization characteristic of target echoes is proposed,the analytical expressions of polarization control matrix and polarization ratio are deduced,and the controllability of polarization ratio feature in the case of circular polarization is verified by simulation calculation.