The BCGS-FFT Method Combined With an Improved Discrete Complex Image Method for EM Scattering From Electrically Large Objects in Multilayered Media

Author

Zhuang, Lei ; He, Siyuan ; Ye, Xingbin ; Hu, Weidong ; Yu, Wenxian ; Zhu, Guoqiang

Author_Institution

Sch. of Electron. Inf., Wuhan Univ., Wuhan, China

Volume

48

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

1180

Lastpage

1185

Abstract

This paper presents an efficient algorithm combining the stabilized biconjugate gradient fast Fourier transform (BCGS-FFT) method with an improved discrete complex image method (DCIM) for electromagnetic scattering from electrically large objects in both lossless and lossy multilayered media. The required spatial Green´s functions obtained by the improved DCIM are accurate both in the near- and far-field regions without any quasi-static and surface-wave extraction. Then, the scattering by buried objects is considered using the BCGS-FFT method combined with the improved DCIM. Numerical results show the improved DCIM can save tremendous CPU time in scattering involving buried objects.

Keywords

Green´s function methods; fast Fourier transforms; geophysical techniques; BCGS-FFT method; CPU time; DCIM; EM Scattering; Sommerfeld integrals; buried objects; discrete complex image method; electrically large objects; electromagnetic scattering; far-field region; lossy multilayered media; near-field region; spatial Green functions; stabilized biconjugate gradient fast Fourier transform method; surface-wave extraction; Discrete complex image method (DCIM); Sommerfeld integrals (SIs); electrically large objects; electromagnetic (EM) scattering; stabilized biconjugate gradient fast Fourier transform (BCGS-FFT);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2009.2031106

Filename

5299217