Simulation of LEMP by Using FDTD Method with CPML in the 2-D Cylindrical Coordinate System

In this paper, the finite-difference time-domain method (FDTD) with convolutional perfectly matched layer (CPML) in 2-D cylindrical coordinate system is derived for the calculating of the lightning electromagnetic pulse (LEMP). The LEMP radiated from channel-base current propagating along the lightning return-stroke channel has been calculated with the proposed methods. The computed waveforms are in good agreement with the waveforms computed by Uman.