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- W2137196654 abstract "Non-radiative 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." @default.
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- W2137196654 date "2011-05-18" @default.
- W2137196654 modified "2023-10-05" @default.
- W2137196654 title "Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer" @default.
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- W2137196654 doi "https://doi.org/10.1103/physrevb.83.205114" @default.
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