Fig. 1
From: Experimental verification of position sensing for a magnetic coil via Fano resonance

Configuration of a system consisting of one transmitting coil (j = 1) and four receiving coils (j = 2 to 5). The position of the transmitting coil is able to be predicted from wave-amplitudes in the four receiving coils using Fano resonance. Dimensions of the identical coils are presented in Table 1. A gap distance of g = 0.2 m between receiving coils is selected unless otherwise mentioned.