A time-domain near- to far-field transformation for FDTD in two dimensions

This paper proposes an algorithm based on the equivalence principle to calc ulate, straightforwardly in the time domain, the transient far field respon se of a two-dimensional structure. The algorithm implementation involves th e numerical evaluation of a time integral along the near- to Sal field conv ersion contour of the equivalent currents at the Huygens surface, obtained with the finite-difference time-domain (FDTD) method. (C) 2000 John Wiley & Sons, Inc.