摘要
采用二维归一化带限Brown分形函数来模拟二维分形粗糙面 ,主要利用基尔霍夫近似给出了该导体粗糙面的电磁散射场 .导出了平均散射场、平均散射系数和散射强度方差的计算公式 .讨论了散射场分布与分维的关系 ,获得了散射场波峰拟合线的斜率与分维D满足线性关系这一重要结论 .
A normalized two\|dimensional band\|limited Brown fractal function is presented for modelling the rough surface. An analytic solution of electromagnetic scattering field from this conducting band\|limited Brown fractal surface is given based on Kirchhoff approximation. The average scattering field, the average scattering coefficient and the average intensity of scattering field are derived with emphasis on examining the relation of fractal dimension with the scattering pattern. The important conclusion is obtained that the diffracted envelope slopes of scattering pattern can be approximated to a slope of linear equation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第6期1064-1069,共6页
Acta Physica Sinica
基金
国防科技预研基金!(批准号 :98J3 .2 .4DZ0 1)资助的课题&&
