Wide-band scattering computation from a randomly rough surface using spectral FDTD algorithm

Author

Kuang, Lei ; Zhu, Shou-Zheng ; Gao, Jian-Jun

Author_Institution

Sch. of Inf. Sci. & Technol., East China Normal Univ., Shanghai, China

fYear

2010

fDate

12-16 April 2010

Firstpage

1470

Lastpage

1473

Abstract

A Spectral Finite-Difference Time-Domain (SFDTD) approach for wide-band electromagnetic scattering from a three-dimensional randomly rough surface is developed. Rough surface is seen as a periodically extensive surface, and the SFDTD method replaces the conventional single-angle incident wave with a constant transverse wave number (CTW) wave. Because the transverse wave numbers are constant, the fields have no delay in the transverse plane and periodic boundary condition (PBC) can be directly implemented in the time domain for both oblique and normal incident pulse waves. The wide-band scattering results from a rough surface obtained in SFDTD method are compared with FDTD method and a good agreement is observed.

Keywords

electromagnetic wave scattering; finite difference time-domain analysis; rough surfaces; FDTD algorithm; constant transverse wave number wave; normal incident pulse waves; oblique pulse waves; periodic boundary condition; randomly rough surface; spectral finite-difference time-domain; transverse plane; wide-band electromagnetic scattering computation; Boundary conditions; Delay effects; Electromagnetic scattering; Finite difference methods; Propagation delay; Rough surfaces; Surface roughness; Surface waves; Time domain analysis; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility (APEMC), 2010 Asia-Pacific Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-5621-5

Type

conf

DOI

10.1109/APEMC.2010.5475512

Filename

5475512