Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 48, Issue 45, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0022-3727/48/45/455104
Keywords
wireless power transfer; metamaterials; misalignment; threshold; efficiency; evanescent wave amplification
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Funding
- Mid-career Researcher Program through the National Research Foundation of Korea (NRF) [2015R1A2A2A03004160]
- National Research Foundation of Korea [2015R1A2A2A03004160] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In a wireless power transfer (WPT) system, misalignment between transmitter and receiver coils is one of the key factors affecting efficiency. Recently, metamaterials have shown great potential to enhance electromagnetic propagation in various environments. In this work, we apply a metamaterial to enhance the WPT in a more general environment where misalignment is considered. Using an anisotropic metamaterial, we obtain a significant efficiency enhancement. Therefore, we propose that the metamaterial is an effective means to mitigate the decreased efficiency caused by misalignment. In addition, we investigate the effect of coil misalignment on the threshold distance beyond which the metamaterial enhances the performance of WPT.
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