Accelerating FDTD simulations for eigenfrequency detection in EBG devices by means of the GPOF method

In this paper, a technique introducing the generalized-pencil-of-function (GPOF) algorithm as a post processing procedure in the finite-difference time-domain (FDTD) method is presented to facilitate the study of electromagnetic bandgap (EBG) devices. Correction criteria are also developed to deal with erroneous eigenfrequencies associated with computational noise. The numerical results obtained are considered sufficiently accurate, while the potentials of this approach are thoroughly discussed. Index Terms--Eigenfrequencies, electromagnetic bandgap (EBG) structures, finite-difference time-domain (FDTD) method, generalized-pencil-of-function (GPOF) method.