FDTD computation modeling for electromagnetic fields generated by spark between charged metals

The occurrence electromagnetic fields caused by the electrostatic discharge (ESD) between the charged metals can be affected by the presence of the metal itself, whereas the effect has not previously been examined. In this paper the finite-difference time-domain (FDTD) method was used to compute the occurrence electromagnetic fields due to the spark between the metal spheres. Comparison was made between the FDTD computation results and the analytical results obtained from a dipole model. The effect of the metal on the ESD field level was also shown.