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Article type: Research Article
Authors: Li, Xiangchaoa; | Ma, Xiaoqia | Xu, Xiaopeia | Cai, Lujina
Affiliations: [a] Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, 210044 Nanjing, Jiangsu, China
Correspondence: [*] Corresponding author: Xiangchao Li, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, 210044 Nanjing, Jiangsu, China. E-mail: 000420@nuist.edu.cn
Abstract: Based on the radiation of the transient electromagnetic fields in lightning discharge channel, we establish the simulated model of lightning channel in the laboratory and analyze the data and waveform, which are received by the low frequency magnetic antenna and the plate capacitance electric field change instrument. Thus we draw some conclusions. In the experiment, the energy of lightning current is mainly concentrated in the low-frequency stage, and the difference of energy between two frequency point decreases with the frequency growth. The waveform of plate capacitance appears after that of magnetic antenna. As the impulse current increasing, the coupling amplitude and energy of the antenna have an increased trend and the growth of the magnetic antenna is more stable. When distance is further, the amplitude and energy of the antenna present a tendency of decrease. And the forepart is steep and the back is flat. The results have some significance on the research of lightning return stroke and lightning electromagnetic fields.
Keywords: Lightning electromagnetic fields, antenna coupling, low-frequency magnetic antenna, plate capacitor
DOI: 10.3233/JAE-180034
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 58, no. 3, pp. 337-345, 2018
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