An Improved Z-buffer Accelerated PO Method for EM Scattering from Electrically Large Targets

BAI Jiangfei; YANG Shunchuan; SU Donglin

doi:10.23919/cje.2024.00.025

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Jiangfei BAI, Shunchuan YANG, and Donglin SU, “An Improved Z-buffer Accelerated PO Method for EM Scattering from Electrically Large Targets,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–8, xxxx doi: 10.23919/cje.2024.00.025

Citation:

Jiangfei BAI, Shunchuan YANG, and Donglin SU, “An Improved Z-buffer Accelerated PO Method for EM Scattering from Electrically Large Targets,” Chinese Journal of Electronics, vol. x, no. x, pp. 1–8, xxxx doi: 10.23919/cje.2024.00.025

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An Improved Z-buffer Accelerated PO Method for EM Scattering from Electrically Large Targets

doi: 10.23919/cje.2024.00.025

1.
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
2.
Research Institute for Frontier Science, Beihang University, Beijing 100191, China

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Author Bio:
Jiangfei BAI received the B.S. degree in School of Electronics and Information from Northwestern Polytechnical University, Xi’an, China, in 2016. He is currently pursuing the Ph.D. degree with School of Electronics and Information Engineering, Beihang University. His research interests include computational electromagnetics and electromagnetic compatibility. (Email: buaabdd@buaa.edu.cn)

Shunchuan YANG received the B.S. degree from Sichuan University, Chengdu, China, in 2009, the M.S. degree from Zhejiang University, Hangzhou, China, in 2012, and the Ph.D. degree from Dalhousie Univer-sity, Halifax, NS, Canada, in 2015.After graduation, he continued his research as a Post-Doctoral Fellow at the University of Toronto, Toronto, ON, Canada. He joined Beihang University, Beijing, China, in Septem-ber 2017, where he is currently an Associate Professor. His research interests are the development of advanced numerical methods, including method of moment, finite-difference time-domain method, finite-element method and their applications. (Email: scyang@buaa.edu.cn)

Donglin SU received the B.S., M.S., and Ph.D. degrees in Electrical Engineering from Beihang University (BUAA), Beijing, China, in 1983, 1986, and 1999, respectively. In 1986, she joined the Faculty of School of Electronics and Information Engineering, BUAA, where she was first an Assistant, then a Lecturer, later on an Associate Professor, and is currently a Full Professor. Her research interests include the numerical methods for microwave and millimeter-wave integrated circuits and systematic electromagnetic compatibility design of various aircrafts. (Email: sdl@buaa.edu.cn)
Corresponding author: Email: sdl@buaa.edu.cn
Available Online: 2024-04-25

Abstract

Abstract

The physical optical (PO) method is widely used to solve the electromagnetic scattering problems involved electrically large structures, in which each surface element is required to determine whether it is blocked by others. It may suffer from the computational efficiency issue through elementwise shadowing testing. In this paper, an efficient Z-buffer based shadowing testing method is proposed to accelerate this procedure. In the proposed method, all triangular facets are first mapped to a grid plane as the Z-buffer method, and for each grid cell, all projected triangles intersecting it are recorded. Then, rigorous shadowing testing is made for all facets recorded in the grid where the centroid of each triangle is projected. It can avoid a large number of redundant operations for pairs of triangles with no occlusion relation, which lead to the same accuracy as the traditional rigorous shadowing testing method with significantly efficiency improvement. Three numerical examples are carried out to validate its accuracy and efficiency.
- Electromagnetic scattering,
- physical optical (PO) method,
- shadowing testing,
- Z-buffer

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References(19)

References

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