雷电冲击电压下环氧树脂基频率选择超材料沿面放电特性

doi:10.19595/j.cnki.1000-6753.tces.170138

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Abstract Frequency selective metamaterial is an ideal enclosure material for stealth radomes. Owing a large number of periodic metal superstructure units in the material, the conventional lightning shielding method cannot protect metamaterial effectively. In this paper, firstly, a frequency selective metamaterial based on the epoxy resin substrate was prepared and morphology characteristics of discharge channels under lightning pulsed voltage were studied. Meanwhile, the parameter of angle factor was proposed and 50% surface flashover voltage was measured. Secondly, the regulation of surface discharge voltage to deviation angle was obtained using angle factor to evaluate insulation characteristics of metamaterial. The results show that the development of discharge channels is broken line and consist of two types of discharge paths. The first type of path is parallel to the periodic direction of the superstructure units, while the second type of path is along the direction at an angle of 45° between the path and the periodic direction of superstructure units. Further analysis shows that main channels of the metamaterial surface discharge occur along the path with the shortest total length of the insulation gap. As the angle between the periodic direction of superstructure units and the connecting line of high-low electrodes increases, surface flashover voltage first increases and then decreases. When the deviation angle is 0° or 45°, surface flashover voltage is lower, while when the deviation angle is 22.5°, the 50% surface flashover voltage is higher. The research results provide theoretical reference for lightning protection on metamaterial stealth radomes.

Key words： Radome metamaterial lightning pulse voltage discharge characteristic

Received: 14 February 2017 Published: 30 October 2017

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TM866

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	Zhao Yushun
	Zhang Hua
	Chen Weijiang
	Yang Xi
	Du Bin

Cite this article:

Zhao Yushun,Zhang Hua,Chen Weijiang等. Analysis of Surface Discharge Characteristics of a Frequency Selective Metamaterial Based on Epoxy Resin under Lightning Pulse Voltage[J]. Transactions of China Electrotechnical Society, 2017, 32(20): 10-19.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170138 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I20/10

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