摘要Electromagnetic scattering from one-dimensional two-layered rough surfaces is investigated by using finite-difference time-domain algorithm (FDTD). The uniaxial perfectly matched layer (UPML) medium is adopted for truncation of FDTD lattices, in which the finite-difference equations can be used for the total computation domain by properly choosing the uniaxial parameters. The rough surfaces are characterized with Gaussian statistics for the height and the autocorrelation function. The angular distribution of bistatic scattering coefficient from single-layered perfect electric conducting and dielectric rough surface is calculated and it is in good agreement with the numerical result with the conventional method of moments. The influence of the relative permittivity, the incident angle, and the correlative length of two-layered rough surfaces on the bistatic scattering coefficient with different polarizations are presented and discussed in detail.
Abstract：Electromagnetic scattering from one-dimensional two-layered rough surfaces is investigated by using finite-difference time-domain algorithm (FDTD). The uniaxial perfectly matched layer (UPML) medium is adopted for truncation of FDTD lattices, in which the finite-difference equations can be used for the total computation domain by properly choosing the uniaxial parameters. The rough surfaces are characterized with Gaussian statistics for the height and the autocorrelation function. The angular distribution of bistatic scattering coefficient from single-layered perfect electric conducting and dielectric rough surface is calculated and it is in good agreement with the numerical result with the conventional method of moments. The influence of the relative permittivity, the incident angle, and the correlative length of two-layered rough surfaces on the bistatic scattering coefficient with different
[1] Guo L X and Wu Z S 2002 Chin. Phys. Lett. 191617 [2] Ren X C and Guo L X 2008 Chin. Phys. Lett. 25101 [3] Ren Y C and Guo L X 2007 Chin. Phys. Lett. 2497 [4] Duss'eaux R 2001 Progress in ElectromagneticsResearch 34 63 [5] Inan K and Ert\"{urk V B 2006 IEEE Trans. Geosci.Remote Sensing 44 3320 [6]Tabatabaeenejad A and Moghaddam M 2006 IEEE Trans.Geosci. Remote Sensing 44 2102 [7] Kuo C H and Moghaddam M 2006 IEEE Trans. AntennasPropagat. 54 2917 [8] Moss C D et al 2006 IEEE Trans. Antennas Propagat. 54 1006 [9] Kuga Y and Phu P 1996 Progress In ElectromagneticsResearch, PIER 14 37 [10] Gedney S D 1996 IEEE Trans. Antennas Propagat. 44 1630 [11] Gedney S D 1996 Electromagnetics 16 425 [12] Taflove A and Hagness S C 1995 ComputationalElectrodynamics: The Finite-Difference Time-Domain Method(Boston: Artech House) [13] Juntunen J S and Tsiboukis T D 2000 IEEE Trans.Microwave Theory Technol. 58 582 [14] Fung A K et al 1995 IEEE Trans. Geosci. RemoteSensing 32 986 [15] Kong J A 1986 Electromagnetic Wave Theory (NewYork: Wiley) [16]Tsang L et al 2001 Scattering of ElectromagneticWaves (New York: John Wiley {\& Sons. Inc.) [17] Curtis J 1996 Dielectric Properties of Soils:Various Sites in Bosnia (U.S. Army Corp. Eng., Washington, DC,Waterways Experiment, Station Data Rep.)
2009, Vol. 26 
