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Magnetic metamaterial superlens for increased range wireless power transfer.

dc.contributor.author Lipworth, Guy
dc.contributor.author Ensworth, Joshua
dc.contributor.author Seetharam, Kushal
dc.contributor.author Huang, Da
dc.contributor.author Lee, Jae Seung
dc.contributor.author Schmalenberg, Paul
dc.contributor.author Nomura, Tsuyoshi
dc.contributor.author Reynolds, Matthew S
dc.contributor.author Smith, David R
dc.contributor.author Urzhumov, Yaroslav
dc.coverage.spatial England
dc.date.accessioned 2014-01-16T15:14:13Z
dc.date.issued 2014-01-10
dc.identifier http://www.ncbi.nlm.nih.gov/pubmed/24407490
dc.identifier srep03642
dc.identifier.uri https://hdl.handle.net/10161/8312
dc.description.abstract The ability to wirelessly power electrical devices is becoming of greater urgency as a component of energy conservation and sustainability efforts. Due to health and safety concerns, most wireless power transfer (WPT) schemes utilize very low frequency, quasi-static, magnetic fields; power transfer occurs via magneto-inductive (MI) coupling between conducting loops serving as transmitter and receiver. At the "long range" regime - referring to distances larger than the diameter of the largest loop - WPT efficiency in free space falls off as (1/d)(6); power loss quickly approaches 100% and limits practical implementations of WPT to relatively tight distances between power source and device. A "superlens", however, can concentrate the magnetic near fields of a source. Here, we demonstrate the impact of a magnetic metamaterial (MM) superlens on long-range near-field WPT, quantitatively confirming in simulation and measurement at 13-16 MHz the conditions under which the superlens can enhance power transfer efficiency compared to the lens-less free-space system.
dc.language eng
dc.publisher Springer Science and Business Media LLC
dc.relation.ispartof Sci Rep
dc.relation.isversionof 10.1038/srep03642
dc.title Magnetic metamaterial superlens for increased range wireless power transfer.
dc.type Journal article
duke.contributor.id Reynolds, Matthew S|0457286
duke.contributor.id Smith, David R|0332562
duke.contributor.id Urzhumov, Yaroslav|0517923
pubs.author-url http://www.ncbi.nlm.nih.gov/pubmed/24407490
pubs.begin-page 3642
pubs.organisational-group Duke
pubs.organisational-group Electrical and Computer Engineering
pubs.organisational-group Faculty
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published online
pubs.volume 4
dc.identifier.eissn 2045-2322


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