Bistatic RCS computations by FDTD and comparison with other rigorous methods and experiment

A new computer code FDTD3D has been developed at the Institute for Radio Fr equency Technology of DLR in order to calculate bistatic radar cross sectio ns (RCS's). It is suited for objects with dimensions comparable to the wave length and is based on the Finite-Difference Time-Domain Method (FDTD). For test objects with perfectly conducting surface (a sphere and a cube) nu merical results of this code are compared and validated with those of the I EM code NEC-2, exact analytical solutions and experimental results achieved by measurements at 94 GHz.