Unidirectional wireless power transfer using near-field plates
Unidirectional wireless power transfer using near-field plates
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DOI：
10.1063/1.4919842
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发表时间：
2015-05
影响因子：
3.2
通讯作者：
M. Imani;A. Grbic
中科院分区：
文献类型：
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作者：
M. Imani;A. Grbic
阻碍无线电力传输变得无处不在的障碍之一是它们的漏电：高幅电磁场可能会干扰其他电子设备，增加健康问题，或阻碍电能计量。在本文中，我们提出了近场极板(NFP)作为一种新的方法来定制无线能量传输系统产生的电磁场，同时保持高效率。NFP是为形成规定的近场图案而设计的调制阵列或表面。本文提出的NFP由加载环路阵列组成，这些加载环路被设计成将谐振发射环路的电磁场限制在期望的方向(接收环路)，同时抑制其他方向的场。介绍了该装置的设计步骤。设计了两个NFP，并在全波仿真中进行了验证。它们的性能与设计预测非常吻合，从而验证了所提出的设计和运行。还制作了一个NFP，并进行了实验验证，形成了一条高效率的单向无线功率传输链路。
One of the obstacles preventing wireless power transfer from becoming ubiquitous is their leakage of power: high-amplitude electromagnetic fields that can interfere with other electronic devices, increase health concerns, or hinder power metering. In this paper, we present near-field plates (NFPs) as a novel method to tailor the electromagnetic fields generated by a wireless power transfer system while maintaining high efficiency. NFPs are modulated arrays or surfaces designed to form prescribed near-field patterns. The NFP proposed in this paper consists of an array of loaded loops that are designed to confine the electromagnetic fields of a resonant transmitting loop to the desired direction (receiving loop) while suppressing fields in other directions. The step-by-step design procedure for this device is outlined. Two NFPs are designed and examined in full-wave simulation. Their performance is shown to be in close agreement with the design predictions, thereby verifying the proposed design and operation. A NFP is also fabricated and experimentally shown to form a unidirectional wireless power transfer link with high efficiency.