Iterative physical optics method based on efficient occlusion judgment with bounding volume hierarchy technology  

作　　者：Yang Su Yu-Mao Wu Jun Hu 

机构地区：[1]Key Laboratory for Information Science of Electromagnetic Waves(MoE),School of Information Science and Technology,Fudan University,Shanghai,200433,China [2]School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu,611731,China

出　　处：《Journal of Electronic Science and Technology》2024年第1期1-12,共12页电子科技学刊（英文版）

基　　金：the National Natural Science Foundation of China under Grants No.62231021 and No.92373201.

摘　　要：This paper builds a binary tree for the target based on the bounding volume hierarchy technology,thereby achieving strict acceleration of the shadow judgment process and reducing the computational complexity from the original O(N^(3))to O(N^(2)logN).Numerical results show that the proposed method is more efficient than the traditional method.It is verified in multiple examples that the proposed method can complete the convergence of the current.Moreover,the proposed method avoids the error of judging the lit-shadow relationship based on the normal vector,which is beneficial to current iteration and convergence.Compared with the brute force method,the current method can improve the simulation efficiency by 2 orders of magnitude.The proposed method is more suitable for scattering problems in electrically large cavities and complex scenarios.

关 键 词：Bounding volume hierarchy Cavity scattering Iterative physical optics(IPO) 

分 类 号：TH744.3[机械工程—光学工程]