| 基于INBC的周期结构FDTD方法 |
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| 引用本文： | 熊瑛,李小健,王天楠,赵晓凡.基于INBC的周期结构FDTD方法[J].北京航空航天大学学报,2021,47(1):31-37. |
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| 作者姓名： | 熊瑛 李小健 王天楠 赵晓凡 |
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| 作者单位： | 中国北方车辆研究所 电磁兼容试验室, 北京 100074 |
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| 摘 要： | 针对周期结构电磁特性参数求解问题，介绍了一种基于网络分析法、矢量拟合法，用来快速求解低剖面周期结构电磁特性参数的内部阻抗边界条件（INBC）与时域有限差分（FDTD）结合的INBC-FDTD计算方法。该方法将金属层的二端口频域阻抗参数曲线先通过矢量拟合法进行有理分式拟合，再对其进行时域变换后嵌入FDTD公式完成对电场、磁场的更新工作。所提方法完整地考虑了在金属层传输的电磁场，其二端口网络阻抗参数全面地考虑了端口之间的互耦问题。
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| 关 键 词： | 频率选择表面(FSS) 矢量拟合法 内部阻抗边界条件(INBC) 周期结构 时域有限差分(FDTD) |
| 收稿时间： | 2020-01-03 |
FDTD method for periodic structure based on INBC |
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| XIONG Ying,LI Xiaojian,WANG Tiannan,ZHAO Xiaofan.FDTD method for periodic structure based on INBC[J].Journal of Beijing University of Aeronautics and Astronautics,2021,47(1):31-37. |
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| Authors: | XIONG Ying LI Xiaojian WANG Tiannan ZHAO Xiaofan |
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| Institution: | EMC Laboratory, China North Vehicle Research Institute, Beijing 100074, China |
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| Abstract: | In order to solve the problem of electromagnetic characteristic parameters of periodic structures, an INBC-FDTD calculation method based on network analysis method and vector fitting method is:introduced in this paper, which can be used to quickly solve the electromagnetic characteristic parameters of low-profile periodic structures.In this method, the two-port frequency domain impedance parameter curve of the metal layer is firstly fitted with rational fractions by the vector fitting method, and then the time domain transform is carried out to embed the FDTD formula to complete the update of the electric field and the magnetic field. The proposed method fully considers electro-magnetic fields transmitted in the metal layer, and its two-port network impedance parameter fully considers the mutual coupling between the ports. |
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