高功率脉冲对接地传输线耦合的FDTD方法  

FDTD method for analyzing the transient coupling of the grounded transmission line under high power electromagnetic pulse incidence

作　　者：王一凡 田炜[1] 王云康 WANG Yifan;TIAN Wei;WANG Yunkang(School of Physics and Electronic Information,Yan’an University,Yan’an 716000,China;Institute for Managing Solid Waste,Yu Lin Ecology and Environment Bureau,Yu Lin 719000,China)

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000 [2]榆林市生态环境局固体废物管理中心,陕西榆林719000

出　　处：《延安大学学报（自然科学版）》2023年第2期115-120,共6页Journal of Yan'an University：Natural Science Edition

基　　金：国家自然科学基金地区项目(62061048,61961041);陕西省科技计划项目(2019JM-363);陕西省自然科学基础研究计划项目(2023-JC-YB-539);榆林市科技计划项目(CXY-2022-188)。

摘　　要：为研究高功率(HPEM)脉冲对电子设备连接线的电磁干扰问题,采用时域有限差分(FDTD)法分析了接地多导体传输线的电磁耦合响应。采用反射定律结合傅里叶变换计算了地面的电磁贡献,通过与直接照射场叠加得到了多导体传输线的激励场,运用二阶精度的中心差分方法对传输线方程进行了离散,给出了节点电压与电流的FDTD迭代方程,FDTD计算域截断采用前后向差分结合终端广义戴维南定理来完成。数值计算得到高功率高斯脉冲对多导体传输线接地负载的电压响应,该方法具有观察点可灵活选取的特征,最后通过典型算例分析了入射波照射方向、接地负载对传输线瞬态耦合的影响规律。In order to study on electromagnetic interference of the high power pulses to the connection lines of electronic devices,the electromagnetic coupling response of the multi-conductor transmission line grounded with load was analyzed using the finite difference in time domain(FDTD)method.The electromagnetic contribution from the ground was calculated by reflection law associated with Inverse Fourier transform,which was superposed with the directly incident field to obtain the excitation field of the multi-conductor transmission line.The central difference approach of the second-order accuracy was utilized to discretize transmission line equations to deduce the updating FDTD equation of voltage and current,in which the FDTD domain was truncated by applying the Thevenin’s theorem with the forward-backward difference.The voltage response on the grounded load was numerically calculated through the use of the FDTD method,indicating that this approach has an advantage in flexibly selecting observation point.Finally,the influence of the incident wave irradiation direction and grounded load on the transient coupling was analyzed in detail by the typical calculation examples.

关 键 词：电磁耦合 多导体传输线 时域有限差分方法 瞬态响应 高功率脉冲 

分 类 号：TN011[电子电信—物理电子学]