电工技术学报2017，Vol.32Issue(20)：10-19,10.DOI:10.19595/j.cnki.1000-6753.tces.170138
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
Analysis of Surface Discharge Characteristics of a Frequency Selective Metamaterial Based on Epoxy Resin under Lightning Pulse Voltage
摘要
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.关键词
雷达罩/超材料/雷电冲击电压/放电特性Key words
Radome/metamaterial/lightning pulse voltage/discharge characteristic分类
信息技术与安全科学引用本文复制引用
赵玉顺,张桦,陈维江,杨熙,杜斌..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[J].电工技术学报,2017,32(20):10-19,10.基金项目
国家自然科学基金资助项目(51677048). （51677048）
