Analysis of electromagnetic scattering and radiation of targets by MoM-PO/PTD hybrid method based on octree optimization

被引：0
|
作者：
Li H. [1 ]
Guo L. [1 ]
Dong C. [1 ]
Meng X. [1 ]
机构：
[1] School of Physics and Information Optoelectronic Engineering, Xidian University, Xi'an
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2021年 / 43卷 / 11期
关键词：
Hybrid method; Method of moments; Octree; Physical optics; Physical theory of diffraction;
D O I：
10.12305/j.issn.1001-506X.2021.11.01
中图分类号：
学科分类号：
摘要：
In the process of comprehensively using the method of moments(MoM) and physical optics (PO), it is necessary to accurately judge the lit region and the shadow region where the PO position is illuminated by a point light source. Time complexity of shadowing algorithm based on traditional method is O(N2) where N represents to the patch number of the target which increases sharply with the increase of patch number. In this paper, the computational intensity can be decreased from N2 to NlgN by using the octree and backward-ray-tracing accelerating the shadow patches cutting. Since the current in the PO area does not consider the influence of edge diffraction on it, the calculation error is relatively large. Taking into account this, physical diffraction theory is introduced to improve the hybrid method by a modification of the PO current density. Compared with the MoM in FEKO, it shows that the modified hybrid algorithm can effectively improve the calculation accuracy. © 2021, Editorial Office of Systems Engineering and Electronics. All right reserved.
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页码：3033 / 3039
页数：6
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