Title :
Moderate conjugate gradient FFT method for rapid convergence in analysing finite FSSs (frequency selective surfaces)
Author :
Stylianou, A. ; Vardaxoglou, J.C.
Author_Institution :
Dept. of Electron. & Electr. Eng., Loughborough Univ. of Technol., UK
Abstract :
A technique to improve the convergence rate of the conjugate gradient fast Fourier transform (CG-FFT) iterative method is presented. Rooftop basis functions are used to expand the surface current and pulse testing functions to weight the tangential fields. Numerical results are shown for a finite dipole array and compared with a conventional formulation using delta basis and testing functions.
Keywords :
antenna arrays; antenna theory; convergence of numerical methods; dipole antennas; fast Fourier transforms; iterative methods; conjugate gradient FFT method; convergence rate; fast Fourier transform; finite dipole array; frequency selective surfaces; iterative method; pulse testing functions; rapid convergence; rooftop basis functions; surface current; tangential fields;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920319
