PERTURBATION METHOD FOR SINUSOIDALLY EXCITED FDTD ANALYSIS

A method for perturbing a sinusoidally excited FDTD simulation is intr oduced, In this scheme, desired simulation output data is read after t he first steady state is reached. Simulated structure is altered sligh tly as the simulation runs, and thus a perturbation is created into th e steady state. A new steady state emerges faster than the initial one and computational efficiency is gained, The new steady state can be p erturbed again with similar efficiency, The method is applicable for f ast optimization of various microwave applications in FDTD analysis.