Figure 11.

Mutual inductance between coil a of Figure 8a, and transmitter coil 7 of the field generator, as defined in Figure 10a. Experimental values are compared to those predicted by the analytical model of Section 2. (a) Test points at 10 $\mathrm{cm}$ from the planar field generator, pitch angle $\theta =0^{\circ }$. (b) Test points at 10 $\mathrm{cm}$ from the planar field generator, pitch angle $\theta ={30}^{\circ }$.