Simulation and experiment for scattering of complex objects stimulated by powerful electromagnetic pulse

The scattering characteristics of an airplane model and the radar absorbing material covered on the model are simulated by the finite-difference time-domain (FDTD) method, and the time-domain echoes and frequency-domain radar cross section echoes of the model from nose-angle, side-angle and back-angle stimulated by an ns pulse are obtained. The results of the simulation and outdoor experiment show that the echo amplitude of the nose-angle is the lowest and that of the side-angle is the highest. The pulse-width of the nose-angle echo is the widest and that of the side-angle is the narrowest. The shape-stealth and material-stealth are not effective for ns or sub-ns pulse signals.