Fig. 3
From: Experimental verification of position sensing for a magnetic coil via Fano resonance

Distributions of the z-component magnetic field |Hz| in the four receiving coils of Fig. 1 at f0 = 9.79 MHz in the xy plane (z = -lc/2), which are obtained by using Altair FEKO. The transmitting coil is positioned at R = 1 m, θ = 30º, and φ = 30º, corresponding to the top right direction in the figure, and is not presented in the figure. The gap distances between receiving coils are selected at (a) g = 0.2 m (proposed) and (b) g = 1 m (conventional), respectively. Fano resonance occurs in (a), where the furthest coil (j = 4) has the strongest magnetic field excitation.