An efficient algorithm for near field RCS of electrically large dynamic targets

Taking into account the influences of near burst fuze, an algorithm, termed the improved equivalent edge currents method(IEEC), is proposed to calculate radar cross section (RCS) of complex targets. Based on the triangle surface element model fitting target configuration and solving occlusion blanking problem by depth buffer theory, the IEEC can calculate reasonably physics optical field and edge diffraction field, and effectively reduce the singularity appeared, make programming more convenient. This method also can calculate GTD failure caustic region because equivalent edge currents changes along with the incident direction and the observation direction, it doesn´t produce caustic. The efficiency and feasibility of the IEEC are demonstrated by computing electromagnetic scattering of tanks and missiles. Results show that the algorithm can calculate the electromagnetic scattering field of relatively complicated targets more precise, it can also support various effective theoretical analysis data for fuze performance design, barrage intersection and simulation studies etc..