Analysis of Leakage Field from Bounded Wave Electromagnetic Pulse Simulator

Parallelized finite-difference time-domain (FDTD) method combined with mirror image theory is used for simulating the leakage of flat-plate bounded wave electromagnetic pulse (EMP) simulator with hybrid configuration. Considering the simulator has the symmetric characteristic and the tangential electric fields are symmetrical at the two sides of the simulator’s symmetry plane, perfectly magnetic conductor (PMC) boundary is applied for the FDTD computing. The results of the method agree well with those of normal FDTD method. The results show that the leakage field from the simulator is affected by the ground conductive characteristic evidently, and the leakage fields near the ground should be concerned specially. The method in this paper is useful for the simulation of other bounded wave EMP simulators. And the method has the advantages of saving computing time and CPU storage.