基于美特材料中电磁隧穿效应的无线电能传输技术（英文）

Metamaterial-Based Electromagnetic Tunneling Effect for Wireless Energy Transfer

提出利用电磁波在两种单负材料和空气组成的三明治结构中的共振遂穿效应可以有效提高非辐射无线能量传输的距离与效率。理论计算显示,通过调节美特材料电磁参数,遂穿现象能够在数百倍器件厚度的尺度上发生,有效突破了中距离的限制。为了验证数值仿真结果,制备并测试了工作在微波波段的电单负(金属线结构)-空气-磁单负(金属蘑菇状结构)电磁遂穿结构。实验结果表明,基于美特材料三明治结构中共振遂穿效应的无线传能技术,能量传输的距离及效率和之前提出的方案相比均有明显提升。以上这些特性有助于推动非辐射无线能量传输技术在日常环境中的实际应用,同时有利于将美特材料应用于非辐射无线能量传输的理论研究。

In this paper, a sandwich structure composed of two different single negative metamaterial layers separated by air is proposed to improve the efficiency of wireless energy transfer. Numerical analysis reveals that by tuning the metamaterials, electromagnetic tunneling phenomena can occur even through a long distance over several hundred times of device length, which is far beyond mid-range. To verify the above analysis, mesh-like and double-sheet metal structures that play the roles of two different single negative metamaterials are fabricated and measured at microwave range. The experimental results show that the energy transfer efficiency, as well as the transfer distance may be superior to some conventional methods proposed previously. These features will be beneficial to the realistic application of wireless energy transfer.