Finite-difference vector potential time-domain approach to the analysis of planar structures

A time-domain finite-difference approach based on the expression of the field vectors by the vector potential functions is proposed for the analysis of planar structures. The algorithm is theoretically equivalent to the time-domain integral equations (TDIE) approach but is much faster because the calculation of the vector potentials is carried out by the finite-difference wave equation instead of integration. Still integration can be involved …