A magneto-inductive wave wireless power transfer device

Stevens Christopher J.; Stevens Christopher J.

doi:10.1017/wpt.2015.3

2015 Volume 2

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A magneto-inductive wave wireless power transfer device

Stevens Christopher J.^,

Department of Engineering Science, The University of Oxford, Parks Road, Oxford OX1 3PJ, UK. Phone: +44 1865 283272

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Author Bio:
Christopher J. Stevens read physics at the University of Oxford, UK, graduating in 1990 with first class honours and prizes for practical physics and received his D. Phil. degree in condensed matter physics in 1994 following a 3-year doctoral program at the same university. Subsequently he worked in Uiversita Degli Studidi Lecce after which he held a Royal Academy of Engineering fellowship at St. Hugh's College, Oxford. He now holds an engineering faculty position at the University of Oxford and is a Fellow of St. Hugh's College, Oxford. His current research activities include ultrawideband communications, metamaterials, ultrafast nanoelectronics, and high-speed electromagnetics
Corresponding author: C. J. Stevens Email: chris.stevens@eng.ox.ac.uk

Wireless Power Transfer 2015, 2(1): 51-59 | Cite this article

Abstract

Magneto-inductive waves are a form of propagation which only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. We present an investigation of their potential as contactless power transfer devices capable of carrying power along a surface between suitably prepared terminals while simultaneously offering a broadband data channel. Input impedances and their matching conditions are explored with a view to offering a simple power system design. A device with 75% peak and 40% minimum efficiency is demonstrated and designs with potential for better than 70% mean and 90% peak are reported. The product of planar magnetic coupling and metamaterial cell Q factor is determined to be a key optimization parameter for high efficiency.
- Metamaterial,
- Induction,
- NFC

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Stevens CJ. 2015. A magneto-inductive wave wireless power transfer device. Wireless Power Transfer 2(1): 51-59 doi: 10.1017/wpt.2015.3

Stevens CJ. 2015. A magneto-inductive wave wireless power transfer device. Wireless Power Transfer 2(1): 51-59 doi: 10.1017/wpt.2015.3

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A magneto-inductive wave wireless power transfer device

Stevens Christopher J.^,

Department of Engineering Science, The University of Oxford, Parks Road, Oxford OX1 3PJ, UK. Phone: +44 1865 283272

Author Bio:
Christopher J. Stevens read physics at the University of Oxford, UK, graduating in 1990 with first class honours and prizes for practical physics and received his D. Phil. degree in condensed matter physics in 1994 following a 3-year doctoral program at the same university. Subsequently he worked in Uiversita Degli Studidi Lecce after which he held a Royal Academy of Engineering fellowship at St. Hugh's College, Oxford. He now holds an engineering faculty position at the University of Oxford and is a Fellow of St. Hugh's College, Oxford. His current research activities include ultrawideband communications, metamaterials, ultrafast nanoelectronics, and high-speed electromagnetics
Corresponding author: C. J. Stevens Email: chris.stevens@eng.ox.ac.uk

Wireless Power Transfer 2, Article number: 10.1017/wpt.2015.3 (2015) | Cite this article

Abstract: Magneto-inductive waves are a form of propagation which only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. We present an investigation of their potential as contactless power transfer devices capable of carrying power along a surface between suitably prepared terminals while simultaneously offering a broadband data channel. Input impedances and their matching conditions are explored with a view to offering a simple power system design. A device with 75% peak and 40% minimum efficiency is demonstrated and designs with potential for better than 70% mean and 90% peak are reported. The product of planar magnetic coupling and metamaterial cell Q factor is determined to be a key optimization parameter for high efficiency.

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