Analysis of Streamer Discharge Characteristics of a Frequency Selective Metamaterial under DC Step-up Condition

作者：Zhao, Yushun^*; Zhang, Hua; Cui, Yuhao; Chen, Weijiang; Fu, Zhong

来源：Transactions of China Electrotechnical Society, 2018, 33(20): 4729-4738.

DOI：10.19595/j.cnki.1000-6753.tces.180111

• Charge deposition
• Discharge characteristics
• Electric field distributions
• Electric field strength
• Engineering applications
• Frequency-selective
• Lightning discharge
• Streamer discharges

Frequency selective metamaterial is an ideal radome material, but its lightning shield failure rate is high, which restricts the engineering application of this material. In this paper, two typical frequency selective metamaterials were prepared. Based on the change of electric field near the target during lightning discharge process, the test method of streamer discharge for metamaterials under DC step-up process was designed. Then, the discharge characteristics of these two metamaterials were studied from three aspects of discharge morphology, breakdown voltage and charge deposition. Furthermore, the electric field distributions of these two metamaterials were analyzed. The results show that, the ring resonator-type metamaterial has the highest breakdown voltage, the discharge filaments are darker and denser, and the discharge filaments near the ground are more. Meanwhile, Jerusalem-type metamaterial has the lowest breakdown voltage, the discharge filaments are brighter and sparser. Further analysis shows that the discharge filaments cause the charged particles accumulating on the skin surface to form surface charge. The surface charge density is hundreds of μC/m2, and the electric field of several tens of kV/cm is generated inside the skin in the same direction as the applied electric field. Thus, the electric field strength inside the skin significantly increases, resulting in the breakdown of the skin under double effect of applied voltage and surface charge. The results provide theoretical reference for lightning protection on metamaterials.

• 出版日期2018
• 单位合肥工业大学