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Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer

Publication ,  Journal Article
Urzhumov, Y; Smith, DR
Published in: Physical Review B - Condensed Matter and Materials Physics
May 18, 2011

Nonradiative coupling between conductive coils is a candidate mechanism for wireless energy transfer applications. In this paper we propose a power relay system based on a near-field metamaterial superlens and present a thorough theoretical analysis of this system. We use time-harmonic circuit formalism to describe all interactions between two coils attached to external circuits and a slab of anisotropic medium with homogeneous permittivity and permeability. The fields of the coils are found in the point-dipole approximation using Sommerfeld integrals which are reduced to standard special functions in the long-wavelength limit. We show that, even with a realistic magnetic loss tangent of order 0.1, the power transfer efficiency with the slab can be an order of magnitude greater than free-space efficiency when the load resistance exceeds a certain threshold value. We also find that the volume occupied by the metamaterial between the coils can be greatly compressed by employing magnetic permeability with a large anisotropy ratio. © 2011 American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

May 18, 2011

Volume

83

Issue

20

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Urzhumov, Y., & Smith, D. R. (2011). Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer. Physical Review B - Condensed Matter and Materials Physics, 83(20). https://doi.org/10.1103/PhysRevB.83.205114
Urzhumov, Y., and D. R. Smith. “Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer.” Physical Review B - Condensed Matter and Materials Physics 83, no. 20 (May 18, 2011). https://doi.org/10.1103/PhysRevB.83.205114.
Urzhumov Y, Smith DR. Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer. Physical Review B - Condensed Matter and Materials Physics. 2011 May 18;83(20).
Urzhumov, Y., and D. R. Smith. “Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer.” Physical Review B - Condensed Matter and Materials Physics, vol. 83, no. 20, May 2011. Scopus, doi:10.1103/PhysRevB.83.205114.
Urzhumov Y, Smith DR. Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer. Physical Review B - Condensed Matter and Materials Physics. 2011 May 18;83(20).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

May 18, 2011

Volume

83

Issue

20

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences