Characterization of mutual coupling effects among multi-antennas mounted on a perfect electrically conducting (PEC) tower platform in the presence of intentional electromagnetic pulses (IEMPs)

An efficient hybrid method, based on time-domain integral equation (TDIE) and time-domain physical optics (TDPO), is proposed for analysing mutual coupling effects and transient responses of multi-antennas mounted on a PEC tower platform in the presence of single as well as multiple intentional electromagnetic pulses (IEMPs). The well-known RWG, the triangular, the wire/surface junction spatial basis functions and the high-order temporal basis functions are used to expand induced currents on the PEC bodies, the PEC wires, and the PEC 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 together with backward scattered fields of several antennas mounted on the same PEC tower platform, respectively. In comparison with the commercial software FEKO and the conventional TDIE-MOT method, the proposed method is more efficient for evaluating various complex electromagnetic environment effects on some multi-antenna communication systems.