二维fBm随机分形界面的电磁散射特性

The scattering of EM waves from two-dimensional fBm random fractal surfaces

应用二维 f Bm(分形布朗运动 )模拟了这种既非完全周期的也非完全随机的实际粗糙界面 ,用 Kirchhoff方法计算了电磁波在随机分形界面的散射特性。数值结果表明随着分形维数的增加 ,散射场中非相关分量逐渐增大 。

Two dimensional fBm (fractional Brownian motion) with fractal characteristics is applied to modeling rough surfaces, which are neither periodic nor random, and Kirchhoff approach is used to analyze the EM scattering from fractal surfaces. Numerical results show the incoherent part of scattered field increases and the sidelobes increase and broaden near specular direction with the increase of fractal dimension.