Title :
A quadrature-sampled precorrected FFT method for the electromagnetic scattering from inhomogeneous objects
Author :
Zhu, Aiming ; Gedney, Stephen D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Kentucky Univ., Lexington, KY, USA
fDate :
6/25/1905 12:00:00 AM
Abstract :
A fast iterative solution for the electromagnetic scattering from inhomogeneous objects computed via the quadrature sampled precorrected fast Fourier transform (QSPCFFT) algorithm is presented. The method is based on a locally corrected Nystrom solution of the volume electric field integral equation. The discontinuous FFT is applied to accelerate the computation of all far interactions. The method preserves the high-order properties of the Nystrom solution, and has a complexity that can scale as O(N log N) and memory that scales as O(N), where N is the number of unknowns.
Keywords :
computational complexity; electric field integral equations; electromagnetic wave scattering; fast Fourier transforms; inhomogeneous media; iterative methods; sampling methods; Nystrom solution; complexity; discontinuous FFT; electromagnetic scattering; inhomogeneous objects; iterative solution; quadrature sampled precorrected fast Fourier transform algorithm; quadrature-sampled precorrected FFT method; volume electric field integral equation; Acceleration; Electromagnetic heating; Electromagnetic scattering; Fast Fourier transforms; Integral equations; Iterative algorithms; Iterative methods; Linear systems; Moment methods; Nonuniform electric fields;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2003.812244
