Abstract: The time-domain equivalent edge current(TD-EEC) method is derived from teh Fourier inversion of the frequency domain equivalent edge current expression and applied to the transient scattering analysis. The time-domain diffracted fields are expressed in terms of a contour integral along the edge for an arbitrary input pulse and angular coefficients, thereby yielding finite results at the caustics of diffracted rays. The results for a perfectly conducting flat plate computed by TD-EEC are compared with FDTD results for back scattering and RCS in a wide band. The two results are in excellent agreement while the multiple diffraction between edges is not included. The multiple diffraction evaluated by TD-EEC will be studied in the future.

Key words: time-domain equivalent edge current method, electromagenetic transient scattering, high-frequency techniques