Capacitive model of multiple conducting bodies in free space for EMI/ESD estimation

The charges on individual conductors are first expressed in terms of the absolute potential which are later modified in terms of one of the absolute potential and the potential difference between the two. If the absolute potentials are now estimated w.r.t. a common reference the actual capacitive equivalent circuit parameters for the two conductors is obtained. By this method we are able to obtain the capacitance of individual conductor w.r.t. the environment.