摘要
利用Ｔ矩阵法，通过严格求解Ｎ个粒子的多次散射方程，发展了任意大小、空间分布和取向的多个非球形粒子集合性相干散射的数值计算方法。数值地给出了群聚椭球粒子双站和后向极化散射与粒子的形状、分布和取向等参量之间定量的函数关系。讨论了（１）群聚椭球粒子与等体积球形粒子后向散射的差异；（２）群聚椭球粒子的不同取向对集合性相干散射的影响；（３）多个粒子相干散射与独立散射的差异；（４）群聚粒子多次相干散射对复散射振幅函数值和消光系数的影响。并将数值结果和已有的实验结果进行了比较。
As the scatterer size is comparable with the wavelength, a rigorous solution of T-matrix is used tocalculate scattering from the scatterer. When scatterers are non-uniformly clustered I coherency of collective scattering from scatterers must be taken into account. We employ multiple scattering formlllation of T-matrix method todevelop numerical simulations of polaring chattering from a cluster of spatially-oriented, non-spherical particles. Numerical results present polarized bistatic and back-scattering and functional dependence on the particle shape, spatialdistribution, orientation and other parameters. Numerical results show that (l ) variations of complex scattering amplitude functions and extinction coefficient of clustered particles due to collectively multiple scattering I (2) the scattering difference between clambered non-spherical and spherical particles I (3) difference between collectively coherentand independent scatteringi (4) the effect due to orientation distribution of clustered non-spherical particles. Numerical calculations are also well compared with experimental data of a twosphere cluster.
出处
《电波科学学报》
EI
CSCD
1996年第3期7-13,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金
上海应用物理研究中心资助
关键词
非球形粒子
群聚粒子
极化散射
电波传播
Non-spherical particle, Clustered particle. T--matrix of multiple chattering, Polarization scattering
