Efficient capacitance computation for computational electromagnetics

Abstract

The capacitance evaluation of conducting bodies is an importance step for prediction of electrostatic discharge problem. In this paper an attempt has been made for the evaluation of charge distribution and the capacitance of conducting surface. There are different methods such as method of moment (MOM), Finite element method (FEM), Finite difference method (FDM), Charge Simulation method (CSM), point matching method and Surface charge method. In this paper the MOM based on the pulse basis function and point matching is used. The integrand is divided into a regular and a singular part. The MOM is based upon the transformation of an integral equation, into a matrix equation by employing expansion of the unknown in terms of known basis functions with unknown coefficients such as charge distribution and hence the capacitance is to be determined. This paper reviews the results of computing the capacitance-per-unit length of square plates. Index Terms-Capacitance, electrostatic discharge, point matching, rectangular subdomain, method of moments, finite element method.