A Wearable Metasurface for High Efficiency, Free-Positioning Omnidirectional Wireless Power Transfer.
A Wearable Metasurface for High Efficiency, Free-Positioning Omnidirectional Wireless Power Transfer.
复制标题
用于高效、自由定位全向无线功率传输的可穿戴超表面。
DOI：
10.1088/1367-2630/ac304a
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发表时间：
2021
影响因子：
3.3
通讯作者：
Zhao,Yang
中科院分区：
文献类型：
--
作者：
Wang,Hanwei;Chen,Yun-Sheng;Zhao,Yang
我们介绍了一种亚表面的设计原理，该亚表面可以形成任何所需的磁场分布，用于以200 kHz为中心的高效无线能量传输，可以用于对植入的医疗设备进行高效充电。与没有这种变形表面的情况相比，这种变形表面可以将单用户和多用户情况下的电能传输效率提高十倍以上。我们的设计实现了发射和接收线圈位置的强健场分布，以及变形表面本身的几何扭曲，证明了其作为可穿戴设备的可行性。通过我们的设计，可以很容易地控制多个用户之间的场分配和随后的功率分配，从均匀分配到任何选择的用户(S)。在亚表面引入三维单胞的情况下，我们从理论上论证了场定向的全方位控制，从而实现了多用户的高效无线能量传输。
We introduce a design principle of metasurfaces that can form any desired distribution of magnetic field for high-efficiency wireless power transfer centered at 200 kHz, which can be used to efficiently charge implanted medical devices. This metasurface can improve the power transfer efficiency for both single-user and multi-user cases by over tenfold compared to those without the metasurface. Our design enables a robust field distribution to the positions of the transmitting and receiving coils, as well as the geometric distortions of the metasurface itself, demonstrating its feasibility as a wearable device. With our design, the field distribution and subsequent power division among the multiple users can be readily controlled from equal distribution to any selective user (s). When incorporating a three-dimensional unit cell of the metasurface, we theoretically demonstrate an omnidirectional control of the field orientation to achieve a high-efficiency wireless power transfer for multiple users.