Extension of forward-backward method with a DFT-based acceleration algorithm for efficient analysis of radiation/scattering from large finite-printed dipole arrays

摘要

A discrete-Fourier-transform (DFT) based forward-backward (FB) algorithm has been developed for the fast and accurate analysis of electrically large freestanding dipole arrays [1]. In this paper, an extension of the FB method (FBM) with a DFT-based acceleration approach is presented to provide a relatively efficient analysis of EM radiation/scattering from an electrically large, planar, periodic, finite dipole array printed on a grounded dielectric substrate. Computational complexity of this new approach is O(N{sub}(tot)), where N{sub}(tot) is the number of unknowns. Numerical results are presented to validate the efficiency and accuracy of the method.