Wave Propagation Speed and Equivalent Impedance of Dielectric-Coated Conductor Representing Lightning Return-Stroke Channel
Wave Propagation Speed and Equivalent Impedance of Dielectric-Coated Conductor Representing Lightning Return-Stroke Channel
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DOI：
10.1109/temc.2023.3235385
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发表时间：
2023-04
影响因子：
2.1
通讯作者：
Koki Kutsuna;S. Koike;N. Nagaoka;Y. Baba;V. Rakov
中科院分区：
文献类型：
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作者：
Koki Kutsuna;S. Koike;N. Nagaoka;Y. Baba;V. Rakov
在雷电回击的电磁模型中，采用通道导体的介质涂层来调节电流波的传播速度。在这封信中，我们研究了速度和通道等效阻抗对这种涂层的电介电常数和磁导率的依赖关系。随着磁导率的增大，电流波的传播速度减小，等效阻抗显著增大。相反，介电常数的增加对这些参数的影响不大。用传输线理论解释了产生这种差异的原因。
In electromagnetic models of lightning return stroke, dielectric coating of channel-representing conductor is used to adjust the current wave propagation speed. In this letter, we examine dependences of both the speed and channel equivalent impedance on the electric permittivity and magnetic permeability of such coating. With increasing the permeability, the propagation speed of current wave decreases and the equivalent impedance increases significantly. In contrast, these parameters are not much influenced by the increase of permittivity. The reason for the difference has been explained in terms of the transmission-line theory.