强激光与粒子束, 2015, 27 (8): 083203, 网络出版: 2015-08-25
有耗地面上架空线缆串扰研究等效电路模型
Equivalent circuit for research on crosstalk of transmission lines above lossy ground
有耗地面 架空线缆 电磁脉冲 等效电路 非线性负载 lossy ground transmission line above the ground electromagnetic pulse equivalent circuit nonlinear load
摘要
基于延迟抽取宏模型算法,将有耗地面上架空传输线分成多段求解,每段分成无损和有损部分.通过矢量匹配(VF)法对地阻抗相关参量进行匹配,利用HSPICE中的Laplace变换建立有损部分的等效电路,结合现有的无损传输线等效电路组成每一段的等效电路,然后将每段等效电路串联起来组成整个传输线的等效电路模型.与时域有限差分(FDTD)法进行对比,结果验证了该方法的正确性.同时对端接瞬态抑制二极管的算例进行了分析,证明了提出的等效电路模型能够轻松解决非线性负载问题.
Abstract
To investigate the coupling mechanism between an electromagnetic pulse and a transmission line above the lossy ground,we built an equivalent circuit for the transmission lines above the lossy ground based on the delay extraction-based passive compact transmission-line (DEPACT) macromodeling algorithm.The transmission line above the lossy ground was viewed as a cascade of some transmission line subnetworks.Each transmission line subnetwork was represented by a cascade of lossy and lossless transmission lines.The equivalent circuit for the lossless section existed.The ground impedance was approximated as a rational function by the vector fitting (VF) method,and the equivalent circuit for the lossy section was built by the “Laplace Element” in HSPICE.The simulation results were compared with the results with the finite difference time domain (FDTD) method and good agreement was obtained.Using this approach,the transient response for the transmission lines above the lossy ground with nonlinear terminations could be obtained easily and accurately.
杨清熙, 王庆国, 周星, 赵敏, 张勇强. 有耗地面上架空线缆串扰研究等效电路模型[J]. 强激光与粒子束, 2015, 27(8): 083203. Yang Qingxi, Wang Qingguo, Zhou Xing, Zhao Min, Zhang Yongqiang. Equivalent circuit for research on crosstalk of transmission lines above lossy ground[J]. High Power Laser and Particle Beams, 2015, 27(8): 083203.
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