Improvement of power output for efficient wireless power transfer by using a stacked coil array

This paper introduces a decoupling method to increase the power output for the realization of efficient wireless power transfer (WPT) by using a linearly stacked coil array as the receiver (Rx). The design of the Rx coil array and the emphasis on how to remove the mutual coupling effects among the coil elements in this array are both described in a simulated WPT system including the transmitter/receiver (Tx/Rx) coils. By utilizing the proposed linear coil array and employing the effective decoupling method, the improvement of the transfer efficiency as defined is demonstrated by simulation results.