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Magnetic superlens-enhanced inductive coupling for wireless power transfer
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Two-coil coupling system; (b) two-coil coupling system with MM lens; (c) 3D system configuration with MM slab and its equivalent axisymmetric 2D model in COMSOL; (d) ratio between the numerically calculated and analytically predicted mutual inductance in the configuration shown in (a).

Image of FIG. 2.
FIG. 2.

(Color online) (a) The ratio of simulated L 21 to the theoretical L 21 calculated in the point-dipole limit, as a function of coil radius R normalized to the wavelength (coil retardation parameter); (b) mutual inductance enhancement as a function of the MM lens width W; (c) mutual inductance enhancement vs lens thickness for a fixed intercoil distance, where L 0 = D/2 is the optimum lens thickness; (d) magnetic loss effect on mutual inductance enhancement.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Mutual coupling enhancement factor dependence on the anisotropy factor (same as lens compression factor). System configuration and magnetic field profile when (b) a = 0.6, (c) a = 1, (d) a = 2.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Enhancement factor ρ depends on the anisotropic MM lens’s material loss tangent ρ = 0.1, 0.1/a, 0.1/a 2; (b) mutual enhancement reduction with an increase in the material loss tangent from σ = 0.1/a 2 to σ = 1/a 2.

Image of FIG. 5.
FIG. 5.

(Color online) Indefinite-permeability lens: coupling enhancement as a function of b = Re(−μz).

Image of FIG. 6.
FIG. 6.

(Color online) The summary of enhancement ratio obtained with isotropic MM lens, anisotropic MM lens, and indefinite lens when the lens radius changes. Isotropic lens has μ = −1−0.1j and L = D/2 in which D = 0.5 m; Anisotropic lens has [μ x , μ x , μ x ] = [−2−0.05j, −2−0.05j, −0.5−0.0125j] and L = D/4; indefinite lens with b = 1 has [μ x , μ y , μ z ] = [−1−0.1j, 1, 1] and L = D/2; indefinite lens with b = 2 has [μ x , μ y , μ z ] = [−2−0.2j, 1, 1] and L = D/2.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic superlens-enhanced inductive coupling for wireless power transfer