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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 2 — Jan. 17, 2011
  • pp: 1091–1100

Investigation on wide-band scattering of a 2-D target above 1-D randomly rough surface by FDTD method

Juan Li, Li-Xin Guo, Yong-Chang Jiao, and Ke Li  »View Author Affiliations


Optics Express, Vol. 19, Issue 2, pp. 1091-1100 (2011)
http://dx.doi.org/10.1364/OE.19.001091


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Abstract

Finite-difference time-domain (FDTD) algorithm with a pulse wave excitation is used to investigate the wide-band composite scattering from a two-dimensional(2-D) infinitely long target with arbitrary cross section located above a one-dimensional(1-D) randomly rough surface. The FDTD calculation is performed with a pulse wave incidence, and the 2-D representative time-domain scattered field in the far zone is obtained directly by extrapolating the currently calculated data on the output boundary. Then the 2-D wide-band scattering result is acquired by transforming the representative time-domain field to the frequency domain with a Fourier transform. Taking the composite scattering of an infinitely long cylinder above rough surface as an example, the wide-band response in the far zone by FDTD with the pulsed excitation is computed and it shows a good agreement with the numerical result by FDTD with the sinusoidal illumination. Finally, the normalized radar cross section (NRCS) from a 2-D target above 1-D rough surface versus the incident frequency, and the representative scattered fields in the far zone versus the time are analyzed in detail.

© 2011 OSA

OCIS Codes
(290.5880) Scattering : Scattering, rough surfaces

ToC Category:
Scattering

History
Original Manuscript: November 12, 2010
Revised Manuscript: December 18, 2010
Manuscript Accepted: December 20, 2010
Published: January 10, 2011

Citation
Juan Li, Li-Xin Guo, Yong-Chang Jiao, and Ke Li, "Investigation on wide-band scattering of a 2-D target above 1-D randomly rough 
surface by FDTD method," Opt. Express 19, 1091-1100 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-2-1091


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