Patent ID: 7812608

Claim:
A method, comprising: calculating a first mutual coupling between a transmitter of an induction array and a receiver of the induction array in the absence of a first bucking coil of the induction array and in the absence of a second bucking coil of the induction array; configuring the first bucking coil to eliminate the first mutual coupling; applying an alternating current to the transmitter in the presence of the first bucking coil and in the absence of the second bucking coil; measuring a second mutual coupling between the transmitter and the receiver in the presence of the first bucking coil and in the absence of the second bucking coil; and configuring the second bucking coil to eliminate the second mutual coupling; wherein the receiver is disposed between the transmitter and the second bucking coil; wherein the first bucking coil is disposed between the transmitter and the receiver; wherein configuring the second bucking coil eliminates mutual coupling between the transmitter and receiver not eliminated by the first bucking coil but existing as a result of manufacturing tolerances; wherein configuring the second bucking coil comprises configuring a location of the second bucking coil based on a magnitude of the measured second mutual coupling; and wherein configuring the second bucking coil comprises configuring a number of turns of the second bucking coil based on a magnitude of the measured second mutual coupling.