Investigation on electromagnetic responses of double objects illuminated by a high-power EMP using hybrid TDIE-TDPO method

An efficient and stable hybrid method, based on time-domain integral equation (TDIE) and time-domain physical optics (TDPO), is proposed for investigating electromagnetic responses of double 3-D objects illuminated by a high-power EMP. The planar triangular patches are used to model the conductive surface with RWG basis functions implemented, while the temporal basis functions of weighted Laguerre polynomials are also employed. A set of hybrid TDIE-TDPO equations are solved by marching-on-in-order scheme (MOO) for the sake of stability. Under such circumstances, compared with the full TDIE solver, the computational complexity of our developed hybrid TDIE-TDPO method is reduced greatly. Several examples are presented to demonstrate its validity and efficiency. In particular, transient electromagnetic responses of different double 3-D conductive objects, illuminated by a HPEMP, are captured and compared for different pulse waveforms and pulse parameters.