Fig. 3From: Inductive coupling for wireless power transfer and near-field communicationMagnetic coupling over distance. \(\rho _1=\rho _2={2.5}\ \mathrm{cm}\), \(N_1=N_2=1\) and \(r_0={0.1} \ \mathrm{mm}\). Top: Mutual inductance. Bottom: Coupling coefficientBack to article page