基于八叉树优化的MoM-PO/PTD混合算法分析目标电磁散射及辐射问题

doi:10.12305/j.issn.1001-506X.2021.11.01

Abstract

Abstract:

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.

Key words: method of moments, physical optics, octree, physical theory of diffraction, hybrid method

CLC Number:

TN014

Hongzu LI, Lixin GUO, Chunlei DONG, Xiao MENG. Analysis of electromagnetic scattering and radiation of targets byMoM-PO/PTD hybrid method based on octree optimization[J]. Systems Engineering and Electronics, 2021, 43(11): 3033-3039.

Figures/Tables 16

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算例	算法
算例	MoM-PO/s	基于八叉树 MoM-PO/PTD/s	加速比
1	9.5	1.3	7.3
2	21	2.7	7.7
3	5.3	0.82	6.5
4	4.7	0.76	6.2
5	35.6	4.87	7.5

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

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