期刊
JOURNAL OF APPLIED PHYSICS
卷 117, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4919842
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资金
- Economic Development Corporation of State of Michigan [N016508]
- National Science Foundation [EECCS0747623]
- Air Force Office of Scientific Research [FA9550-09-1-0696]
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. (c) 2015 AIP Publishing LLC.
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