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Magnetic superlens-enhanced inductive coupling for wireless power transfer

Publication ,  Journal Article
Huang, D; Urzhumov, Y; Smith, DR; Hoo Teo, K; Zhang, J
Published in: Journal of Applied Physics
March 15, 2012

We investigate numerically the use of a negative-permeability perfect lens for enhancing wireless power transfer between two current carrying coils. The negative permeability slab serves to focus the flux generated in the source coil to the receiver coil, thereby increasing the mutual inductive coupling between the coils. The numerical model is compared with an analytical theory that treats the coils as point dipoles separated by an infinite planar layer of magnetic material Urzhumov, Phys. Rev. B 19, 8312 (2011). In the limit of vanishingly small radius of the coils, and large width of the metamaterial slab, the numerical simulations are in excellent agreement with the analytical model. Both the idealized analytical and realistic numerical models predict similar trends with respect to metamaterial loss and anisotropy. Applying the numerical models, we further analyze the impact of finite coil size and finite width of the slab. We find that, even for these less idealized geometries, the presence of the magnetic slab greatly enhances the coupling between the two coils, including cases where significant loss is present in the slab. We therefore conclude that the integration of a metamaterial slab into a wireless power transfer system holds promise for increasing the overall system performance. © 2012 American Institute of Physics.

Duke Scholars

Published In

Journal of Applied Physics

DOI

ISSN

0021-8979

Publication Date

March 15, 2012

Volume

111

Issue

6

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Huang, D., Urzhumov, Y., Smith, D. R., Hoo Teo, K., & Zhang, J. (2012). Magnetic superlens-enhanced inductive coupling for wireless power transfer. Journal of Applied Physics, 111(6). https://doi.org/10.1063/1.3692757
Huang, D., Y. Urzhumov, D. R. Smith, K. Hoo Teo, and J. Zhang. “Magnetic superlens-enhanced inductive coupling for wireless power transfer.” Journal of Applied Physics 111, no. 6 (March 15, 2012). https://doi.org/10.1063/1.3692757.
Huang D, Urzhumov Y, Smith DR, Hoo Teo K, Zhang J. Magnetic superlens-enhanced inductive coupling for wireless power transfer. Journal of Applied Physics. 2012 Mar 15;111(6).
Huang, D., et al. “Magnetic superlens-enhanced inductive coupling for wireless power transfer.” Journal of Applied Physics, vol. 111, no. 6, Mar. 2012. Scopus, doi:10.1063/1.3692757.
Huang D, Urzhumov Y, Smith DR, Hoo Teo K, Zhang J. Magnetic superlens-enhanced inductive coupling for wireless power transfer. Journal of Applied Physics. 2012 Mar 15;111(6).
Journal cover image

Published In

Journal of Applied Physics

DOI

ISSN

0021-8979

Publication Date

March 15, 2012

Volume

111

Issue

6

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences