EXTENSION OF FORWARD-BACKWARD METHOD WITH DFT-BASED ACCELERATION ALGORITHM FOR THE EFFICIENT ANALYSIS OF LARGE PERIODIC ARRAYS WITH ARBITRARY BOUNDARIES

摘要

An extension of the discrete Fourier transform (DFT)-based forward-backward algorithm is developed using the virtual-element approach to provide a fast and accurate analysis of electromagnetic radiation/scattering from electrically large, planar, periodic, finite (phased) arrays with arbitrary boundaries. Both the computational complexity and storage requirements of this approach are O(N{sub}(tot)) (N{sub}(tot) is the total number of unknowns). The numerical results for both printed and freestanding dipole arrays with circular and/or elliptical boundaries are presented to validate the efficiency and accuracy of this approach.