Title :
An accurate conjugate gradient fast Fourier transform method for electromagnetic scattering
Author :
Millard, Xuemin ; Liu, Qing Huo ; Harrell, Dale
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of West Florida, Pensacola, FL, USA
Abstract :
An accurate conjugate gradient fast Fourier transform (CG-FFT) for solving electromagnetic scattering problems is developed by improving the accuracy of estimating the spectrum of the Green´s function. Compared to the traditional CG-FFT algorithm, this new approach reduces the relative error by a factor of 5 to 20 for one-dimensional electromagnetic scattering models while maintaining the computational cost in terms of CPU time and memory requirement.
Keywords :
Green´s function methods; conjugate gradient methods; electromagnetic wave scattering; fast Fourier transforms; CG-FFT; CPU time; Green function; conjugate gradient; electromagnetic scattering; fast Fourier transform; memory requirement; spectrum estimation; Computational efficiency; Computer errors; Convolution; Electromagnetic modeling; Electromagnetic scattering; Fast Fourier transforms; Green´s function methods; Integral equations; Iterative methods; Permittivity;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552469
