This article presents a design and systems level implementation of a magnetic resonance-based wireless power transfer system with a novel metasurface layer. This layer shapes the magnetic field through it that results in “MetaResonance.” This phenomenon is key in transforming an existing surface into an intelligent wireless charger for the following: 1) reconfigurable and on-demand energy shaping that can customizable energy hologram; and 2) beamforming to charge multiple devices. The advantages of MetaResonance over conventional methods such as inductive and magnetic resonance charging, distributed RF and magnetic beamforming, and energy hopping lie in its ability to provide high-power delivery with safety guarantees, high end-to-end efficiency, and customized power distribution profile in three dimensions over the surface. From a systems implementation viewpoint, we achieve this through a power distribution layer at the bottom and the MetaResonance cell array layer at top. We have simulated, fabricated, and built an experimental setup of the proposed MetaResonance wireless power transfer system. Performance results demonstrate the reconfigurability in the power and energy fields over the whole surface with fine granularity. Specifically, the magnetic field can be blocked within 2 cm with more than 95% efficiency while the power transfer efficiency can be improved up to 92.8% by beamforming. We have demonstrated various real-world charging applications concerning consumer electronics, industrial tools, battery packs, and medical device wireless charging.

中文翻译：

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MetaResonance——用于全息无线功率传输的可重构表面


本文介绍了具有新型超表面层的基于磁共振的无线电力传输系统的设计和系统级实现。该层通过它塑造磁场，从而产生“元共振”。这种现象是将现有表面转变为智能无线充电器的关键，具有以下功能：1）可重新配置和按需能量整形，可定制能量全息图； 2) 波束成形为多个设备充电。与感应式和磁共振充电、分布式射频和磁波束形成以及能量跳跃等传统方法相比，MetaResonance 的优势在于其能够提供安全保证的高功率传输、高端到端效率和定制功率分配表面上的三维轮廓。从系统实现的角度来看，我们通过底部的电源分配层和顶部的 MetaResonance 单元阵列层来实现这一点。我们模拟、制造并构建了所提出的 MetaResonance 无线功率传输系统的实验装置。性能结果证明了整个表面上功率和能量场的细粒度可重构性。具体来说，磁场可以在2厘米内被阻挡，效率超过95%，而通过波束成形可以将功率传输效率提高至92.8%。我们展示了涉及消费电子产品、工业工具、电池组和医疗设备无线充电的各种实际充电应用。