A Numerical Study of Low Grazing Angle Backscattering from Random Rough Surfaces

不規則 粗面에서 저입사각 후방산란에 관한 수치해석

  • Kwang-Yeol Yoon (Department of Electronic Engineering, Keimyung University)
  • Published : 2002.07.01


We have numerically analyzed the electromagnetic wave scattering from randomly rough dielectric surfaces by using the finite volume time domain (FVTD) method. We have then shown that the present method yields a reasonable solution even at low-grazing angle (LGA). It should be noted that the number of sampling points per wavelength should be increased when more accurate numerical results are required, which fact makes the computer simulation impossible at LGA for a stable result. However, when the extrapolation is used for calculating the scattered field, an accurate result can be estimated. If we want to obtain the ratio of backscattering between the horizontal and vertical polarization, we do not need the large number of sampling points. The results are compared with the experimental data.


FVTD Method;Low Crazing Angle;Backscattering Coefficient;Polarization Ratio


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