Wideband radar echo simulation of rotationally asymmetric target with non-ideal scattering centers

摘要

In order to control its attitude, there usually have wings or other structures on the midcourse target. It is the foundation to simulate the radar echo of this kind of rotationally asymmetric target to get it recognized correctly. Firstly, the position variation of each scattering center on both the body and the wing is analyzed. After that, according to the high frequency method and local field theory, the RCS calculation formulas of body and wings of the target are derived with the Geometrical Theory of Diffraction(GTD) and Physical Optics(PO) method respectively. Then, a simple method is put forward to judge whether the wing is shielded with the target's movement according to the PO method. Finally, the wideband radar echo is simulated and the impacts of non-idealization of the scattering centers and rotationally asymmetry of the target on the echo are also analyzed.