In this application note, simulation of the Radar Cross Section (RCS) in time-domain is described in WIPL-D Software suite. The products used are WIPL-D Pro and WIPL-D Time Domain Solver. Well known metallic object NASA almond was illuminated by plane wave using Gaussian modulated sine. Near field results in time domain are shown.
Object is about 60 wavelengths long, about 4 wavelengths high and about 0.2 wavelengths thin. Polarization is parallel to the longer semi axes of the almond’s cross section. Two symmetry planes are used in order to reduce required number of unknowns for current approximation. It is made using pre-defined object named BoR (Body of Rotation).
Simulation is performed on the inexpensive desktop machine (any regular desktop or laptop will do). One can conclude that WIPL-D Time-Domain Solver combined with extremely efficient MoM solver WIPL-D Pro is very applicable for the time domain simulation. Simulation time is measured in minutes for over 100 frequency points.