运动介质球的瑞利散射特性研究  

Investigation of Rayleigh Scattering for Moving Dielectric Spheres

作　　者：李瑾[1] 李应乐[2] 

机构地区：[1]西安电子科技大学理学院,西安710071 [2]咸阳师范学院电波传播与散射研究所,陕西咸阳712000

出　　处：《重庆理工大学学报（自然科学）》2011年第3期123-126,共4页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(60971079);陕西省自然科学基金资助项目(2009JM8020);陕西省教育厅自然科学基金资助项目(09JK800)

摘　　要：基于电磁场的多尺度理论和相对论理论,得到了高速运动目标散射场的表达式。以各向同性介质球、单轴介质球为例,研究了微分散射随目标运动速度、电磁参数张量的变化。结果表明:前向散射随速度的增大而增大,后向散射则相反;对单轴介质目标而言,非光轴方向的介电常数、光轴方向上的磁导率对散射有着较大的影响,光轴方向的介电常数、非光轴方向的磁导率对散射的影响不大。Based on the scales theory of electromagnetic field and the relativistic theory,the analytical expression of the targets moving in high speed was researched.Taking the isotropic dielectric sphere and the mono-axial dielectric sphere as examples,the changes of differential scattering cross section versus the speed,electromagnetic parameter tensors were presented.Results show that the forward scattering is stronger and the backward scattering is smaller as the moving speed being big.For the mono-axial dielectric target,the dielectric constant in non-optical axis direction and the permeability in optical axis direction have big contributions in scattering.However the dielectric constant and permeability respectively in optic axis and non-optical axis directions have not a great influence.

关 键 词：运动目标 电磁张量 电磁散射 

分 类 号：O45[理学—无线电物理] O44[理学—物理]