CHARACTERIZATION OF THE VALIDITY REGION OF THE EXTENDED T-MATRIX METHOD FOR SCATTERING FROM DIELECTRIC CYLINDERS WITH FINITE LENGTH
CHARACTERIZATION OF THE VALIDITY REGION OF THE EXTENDED T-MATRIX METHOD FOR SCATTERING FROM DIELECTRIC CYLINDERS WITH FINITE LENGTH
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DOI：
10.2528/pier09083101
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发表时间：
2009
影响因子：
6.7
通讯作者：
W. Yan;Yang Du;Zeng-yuan Li;E. Chen;Jian Shi
中科院分区：
文献类型：
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作者：
W. Yan;Yang Du;Zeng-yuan Li;E. Chen;Jian Shi
T矩阵方法是分析薄片散射体电磁散射的有效方法。然而，对于具有极端几何形状的散射体，这种方法可能会失败。一个例子是它无法分析散射介质柱与大的纵横比。为了解决这一问题，最近我们提出了一种基于T矩阵方法的扩展方法，将长圆柱体假设地划分为一组相同的子圆柱体，对每个子圆柱体都可以稳定地计算T矩阵。特别注意满足任意两个相邻子柱假设表面的边界条件。所得的耦合方程不同于多散射体理论的耦合方程。模型计算结果与文献中已有的实验数据吻合较好。然而，所提出的方法的有效性区域没有得到充分的表征。现在，我们已经开发并验证了矩量法（MoM）代码，并且能够执行以下任务：
The T-matrix approach is efiective in analyzing electro- magnetic scattering from flnite scatterers. Yet for scatterers with ex- treme geometry, this approach may fail. One example is its inability to analyze scattering from dielectric cylinders with large aspect ratios. To deal with such di-culty, recently we proposed a method based on an extension of the T-matrix approach, where a long cylinder is hy- pothetically divided into a cluster of identical sub-cylinders, for each the T matrix can be numerically stably calculated. Special care was paid to fulflll the boundary conditions at the hypothetic surface of any two neighboring sub-cylinders. The resultant coupled equations are difierent from that of multi-scatterer theory. The model results were in good agreement with experiment data available in the liter- ature. However, the validity region of the proposed method was not fully characterized. Now we have developed and validated a method of moment (MoM) code, and are in a position to carry on the task of