| 目标电磁散射的面中心立方体网格FDTD方法 |
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| 引用本文： | 杨利霞,汪刘丰,陈伟,薄勇.目标电磁散射的面中心立方体网格FDTD方法[J].系统工程与电子技术,2021,43(10):2718-2724. |
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| 作者姓名： | 杨利霞 汪刘丰 陈伟 薄勇 |
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| 作者单位： | 1. 安徽大学电子信息工程学院, 安徽 合肥 2306012. 目标探测与特征提取安徽省重点实验室, 安徽 六安 237000 |
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| 基金项目： | 国家自然科学基金(62071003);国家自然科学基金(41874174);国家自然科学基金(61901004);电磁散射重点实验室基金(61424090107);安徽省自然科学基金(2008085MF186);安徽省重点科研平台协同创新项目(GXXT-2020-050);安徽省高校协同创新计划项目(GXXT-2021-028);国家国防科工局基础研究重点项目(稳定支持项目) |
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| 摘 要： | 基于面中心立方体(face-centered cube, FCC)网格的空间结构, 由麦克斯韦方程出发, 推导了基于FCC网格的单轴各向异性介质完全匹配层(uniaxial anisotropic media perfectly matched layer, UPML)吸收边界条件以及近-远场外推边界条件的三维迭代式。通过典型算例, 先后验证了基于面中心立方体网格的时域有限差分(FCC-finite difference time domain, FCC-FDTD)方法的UPML吸收边界条件和近远场外推边界条件的正确性。最后通过计算金属球的后向雷达散射截面(radar cross section, RCS)比较了FCC-FDTD方法与传统FDTD方法的计算精度, 结果显示FCC-FDTD方法具有更高的计算精度。
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| 关 键 词： | 面中心立方体网格 时域有限差分方法 各向异性介质完全匹配层 近远场外推 雷达散射截面 |
| 收稿时间： | 2021-05-17 |
FDTD method of face-centered cube grid for electromagnetic scatteringcharacteristics of object |
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| Lixia YANG,Liufeng WANG,Wei CHEN,Yong BO.FDTD method of face-centered cube grid for electromagnetic scatteringcharacteristics of object[J].System Engineering and Electronics,2021,43(10):2718-2724. |
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| Authors: | Lixia YANG Liufeng WANG Wei CHEN Yong BO |
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| Affiliation: | 1. School of Electronic Information Engineering, Anhui University, Hefei 230601, China2. Key Laboratory of Target Detection and Feature Extraction of Anhui Province, Lu'an 237000, China |
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| Abstract: | Based on the spatial structure of the face-centered cube (FCC), starting from Maxwell's equation, derived the 3-D iterative formulas for the absorption boundary conditions of the uniaxial anisotropic media perfectly matched layer (UPML) and near-to-far field extrapolation boundary conditions based on the FCC grid. Through typical calculation examples, the correctness of UPML absorption boundary conditions and near-to-far field extrapolation boundary conditions based on finite difference time domain method of FCC (FCC-FDTD) are successively verified. Finally, the calculation accuracy of the FCC-FDTD method and the traditional FDTD method is compared by calculating the backward radar cross section (RCS) of the metal ball. The results show that the FCC-FDTD method has higher calculation accuracy. |
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| Keywords: | face-centered cube grid (FCC) finite-difference time-domain method uniaxial perfectly matched layer (UPML) near-to-far field extrapolation radar cross section (RCS) |
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