摘要
采用一维带限Weierstrass分形函数建立了分形土壤面模型.结合土壤的介电特性,运用矩量法研究了一维带限Weierstrass分形土壤面的后向电磁散射特征,数值计算得到了土壤后向电磁散射系数随入射角变化的曲线,分析了土壤面均方根高度、分维数、土壤湿度以及入射波频率对后向电磁散射系数的影响,得到了较完整的后向电磁散射特征.
The model of the fractal soil surface is established by using 1-D band-limited Weierstrass fractal function.Combined with the dielectric characteristics of the soil,the characteristics of electromagnetic backscattering from 1-D band-limited Weierstrass fractal soil surface are studied using the method of moment.The curves of the backscattering coefficient changing with the incident angle are obtained by the numerical calculation.The influences of the height mean square root,the fractal dimension,the soil moisture,the frequency of incident wave on the electromagnetic backscattering coefficient are analyzed,and more complete characteristics of electromagnetic backscattering are obtained.
出处
《河南科学》
2013年第6期780-783,共4页
Henan Science
基金
国家自然科学基金项目(61001020)
延安市科技计划项目(2011kg-12
012kg-10)
榆林市科技计划项目(Gj11-01)
关键词
后向电磁散射
分形土壤表面
矩量法
electromagnetic backscattering
fractal soil surface
method of moment
