Characteristic of Bistatic High-range Resolution Profiles of Rotational Symmetry Targets

The bistatic scattering centres are usually modeled as the monostatic scattering centres, however, the fact that the location of the scattering centre changes with the bistatic configuration is ignored. This paper focuses on the bistatic scattering characteristic of a rotational symmetry cone-shaped target. Firstly, the locations of the bistatic scattering centres on the edge of the undersurface are deduced with the method of the equivalent currents, where are the points of intersection of the edge of the undersurface and the plane constructed by the symmetry axis and the bisector of the bistatic angle. Then, based on the above conclusion, the wideband bistatic echo model of this target is deduced and the theoretical bistatic High-Range Resolution Profile (HRRP) is constructed. Finally, the bistatic HRRPs of a cone-shaped target are calculated via the Feko software and the calculated bistatic HRRPs keep consilient with the theoretical bistatic HRRPs, which validates the theoretical deduction. The location of the bistatic scattering centres revealed in this paper will provide an exact mathematics model for the wideband echo simulation, imaging, feature extraction and Automatic Target Recognition (ATR) of the rotational symmetry target in the bistatic radar.