时变分形曲面的电磁散射

Electromagnetic Scattering from Time-variant Fractal surface

本文提出描述自然地表面的时变分形曲面模型，并采用基尔霍夫解分析时变分形曲面散射场的时域分形特性。理论分析和实验表明散射场的实应两部在时域上都近似为随机分形函数，其分形特征相同且分维值与分形曲面的分维值一致。

The time-variant fractal surface to midel natural earth's surface is proposed and the fractal proper ty of Which is analyzed with Kirchhoff solution in time domain . The theoretical analysis and numerical experiments sbow that both real and image part of scattering field are close to random fractal fimction in the domain,fractal dimension of which is consistent with that of fractal surface .