GO/PO and PTD With Virtual Divergence Factor for Fast Analysis of Scattering From Concave Complex Targets
GO/PO and PTD With Virtual Divergence Factor for Fast Analysis of Scattering From Concave Complex Targets
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GO/PO 和 PTD 具有虚拟发散因子，可快速分析凹面复杂目标的散射
DOI：
10.1109/tap.2015.2405086
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发表时间：
2015-02
影响因子：
5.7
通讯作者：
Z. P. Nie
中科院分区：
文献类型：
--
作者：
W. F. Huang;Z. Q. Zhao;R. Zhao;J. Ye. Wang;Z. P. Nie
基于光线追踪的几何光学（GO）和物理光学（PO）的混合方法由于简单，已被广泛用于快速散射分析。然而，当用平面对曲面凹目标进行离散化时，发散因子（DF）的损失会降低仿真精度。为了弥补这一损失，提出了一种简单有效的因子，即虚拟发散因子（VDF）来发挥DF的作用。为了证明VDF的有效性，并对凹形复杂目标的散射进行仿真，提出了一种基于GO/PO和物理衍射理论（PTD）的混合方法。在VDF校正的基础上，对s型空腔等几种典型目标进行了仿真。与多电平快速多极子算法（MLFMA）或测量相比较，VDF方法在正则曲面上具有良好的一致性和较好的性能，充分证明了该方法的有效性，同时也显示了该混合方法的高效率和灵活性。此外，本文还首次研究了一个有趣而重要的问题，即场收敛与最大反射次数的关系。
Due to simplicity, hybridization of geometrical optics (GO) and physical optics (PO) based on ray tracing has been widely used for fast scattering analyses. However, when targets of curved concavities are discretized by flat facets, the loss of divergence factor (DF) will degrade the simulation accuracy. To remedy this loss, a simple and efficient factor, entitled virtual divergence factor (VDF), is proposed to play the role of DF. To prove the validity of VDF and simulate the scattering of concave complex targets, a hybrid method of GO/PO and physical theory of diffraction (PTD) is elucidated. With VDF correction, several typical targets, including a S-shape cavity, are simulated by this hybrid method. In comparison to multilevel fast multipole algorithm (MLFMA) or measurements, the validaty of VDF is fully demonstrated by good agreements and the excellent performance relative to DF on canonical surfaces, where the great efficiency and flexibility of this hybrid method are also shown. Moreover, one interesting and important issue, the dependance of field convergence on the maximum number of ray reflections, is also investigated for the first time.
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DOI：
10.1007/bf02846778
发表时间：
1991-12
期刊：
Pramana
影响因子：
--
作者：
P. B. S. Kumar;G. Ranganath
通讯作者：
P. B. S. Kumar;G. Ranganath
DOI：
10.1049/pbew037e
发表时间：
1994-06
期刊：
--
影响因子：
--
作者：
V. Borovikov;B. Kinber
通讯作者：
V. Borovikov;B. Kinber
影响因子：
5.7
作者：
T. Griesser;C. Balanis
通讯作者：
T. Griesser;C. Balanis
影响因子：
5.7
作者：
MICHAELI, A
通讯作者：
MICHAELI, A
影响因子：
5.7
作者：
Zhiqin Zhao;J. West
通讯作者：
Zhiqin Zhao;J. West