Efficient analysis of transient responses of some antenna arrays in the presence of high-power electromagnetic pulses (HP-EMP)

An efficient hybrid method, based on time-domain integral equation (TDIE) and time-domain physical optics (TDPO), is proposed for analysing transient responses of some antenna arrays in the presence of high-power electromagnetic pulses (HP-EMP). Three triangular-type basis functions are used to expand induced currents on the bodies, the wires, and the wire/surface junctions, respectively. A set of hybrid TDIE-TDPO equations are derived and solved by using marching-on-in-time scheme (MOT). The developed numerical algorithm is verified in both time- and frequency-domains for predicting S₁₁- and S₂₁-parameters, directivities, induced currents as well as backward scattered fields of different antennas mounted on the PEC pedestals which are touched to one common PEC platform, respectively. These results are useful for further evaluating complex electromagnetic environment effects on some communication systems.