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传输线端接复杂电路的电磁耦合时域分析方法

叶志红 苟丹 吴小林 周健健

叶志红, 苟丹, 吴小林, 周健健. 传输线端接复杂电路的电磁耦合时域分析方法[J]. 电子与信息学报, 2021, 43(1): 242-248. doi: 10.11999/JEIT191026
引用本文: 叶志红, 苟丹, 吴小林, 周健健. 传输线端接复杂电路的电磁耦合时域分析方法[J]. 电子与信息学报, 2021, 43(1): 242-248. doi: 10.11999/JEIT191026
Zhihong YE, Dan GOU, Xiaolin WU, Jianjian ZHOU. Time Domain Analysis Method for the Coupling Problem of Transmission Lines Terminated with Complex Circuits[J]. Journal of Electronics & Information Technology, 2021, 43(1): 242-248. doi: 10.11999/JEIT191026
Citation: Zhihong YE, Dan GOU, Xiaolin WU, Jianjian ZHOU. Time Domain Analysis Method for the Coupling Problem of Transmission Lines Terminated with Complex Circuits[J]. Journal of Electronics & Information Technology, 2021, 43(1): 242-248. doi: 10.11999/JEIT191026

传输线端接复杂电路的电磁耦合时域分析方法

doi: 10.11999/JEIT191026
基金项目: 国家自然科学基金(61701057),重庆市基础与前沿研究计划项目(cstc2017jcyjAX0345)
详细信息
    作者简介:

    叶志红:男,1988年生,副教授,研究方向为电磁兼容和计算电磁学等

    苟丹:女,1996年生,硕士生,研究方向为电磁兼容等

    吴小林:男,1983年生,讲师,研究方向为电力线通信、智能电网、统计与自适应信号处理和机器学习系统

    周健健:男,1995年生,硕士生,研究方向为电磁兼容等

    通讯作者:

    叶志红 yezh@cqupt.edu.cn

  • 中图分类号: O441

Time Domain Analysis Method for the Coupling Problem of Transmission Lines Terminated with Complex Circuits

Funds: The National Natural Science Foundation of China(61701057), The Chongqing Research Program of Basic Research and Frontier Technology(cstc2017jcyjAX0345)
  • 摘要:

    该文基于时域有限差分(FDTD)方法和传输线方程,结合Ngspice软件,提出一种高效的时域混合算法,能够快速模拟空间电磁场作用传输线端接复杂电路的电磁耦合问题。该算法的优势在于实现了空间电磁场辐射与端接复杂电路瞬态响应的协同计算,且避免了对传输线和复杂电路结构的直接建模。首先,将复杂电路通过传输线的特性阻抗进行等效,采用FDTD方法结合传输线方程,求解得到特性阻抗上的入射电流响应。然后,在每个时间步上,将该电流引入复杂电路作为激励源,联合电路模型建立网表文件。最后,使用Ngspice软件读取网表文件,并仿真得到电路各元件上的瞬态响应。通过相应计算实例的数值模拟,与电磁场仿真软件CST的计算结果以及耗用内存和时间进行对比,验证了算法的正确性和高效性。

  • 图  1  时域混合算法的实施步骤

    图  2  导电板上多导线端接复杂电路的物理模型

    图  3  传输线的FDTD网格划分

    图  4  电路传导干扰的Ngspice仿真过程

    图  5  理想导电板上端接复杂集总电路的多导体传输线模型

    图  6  集总电路中电阻${R_{r2}}$的瞬态电压响应

    图  7  理想导电板上端接复杂非线性电路的多导体传输线模型

    图  8  非线性电路电阻${R_{l2}}$的瞬态电压响应

    图  9  屏蔽腔内端接复杂集总电路的多导体传输线模型

    图  10  屏蔽腔内集总电路电阻${R_{g2}}$的瞬态电压响应

    表  1  两种方法计算所需内存和时间的对比

    方法内存(MB)计算时间(s)
    CST125.8480
    时域混合算法25.5400
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-12-23
  • 修回日期:  2020-10-27
  • 网络出版日期:  2020-11-16
  • 刊出日期:  2021-01-15

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