Solution of Time-Domain MFIE and CFIE Using Adaptive MOO Method for Transient Scattering in the Presence of an EMP

The adaptive marching-on-in-order method (MOO) to solve time-domain magnetic and combined field integral equations is proposed for capturing transient responses of some 3-D PEC objects illuminated by an EMP. We directly employ an exact temporal Galerkin testing with no central approximation used, and using surface current density of the object as the unknown without employing the Hertz vector. The fast Fourier transform (FFT)-based blocking scheme is further implemented. This method is similar to the improvement over the earlier MOO for solving time-domain eclectic field integral equation. Transient electromagnetic responses of some typical conductive objects are obtained and compared for validating both computational accuracy and applicability of our proposed three TDIE-MOO algorithm.