Magnetoinductive waves for wireless power transfer: challenges and solutions

Inhalt:
We present how travelling magnetoinductive waves through a 1-dimensional array of inductive-capacitive resonators can be applied in a wireless power transfer system to power up a receiver device located 5 mm away of the transmitter array with an optimized efficiency of up to 60%. Although using magnetoinductive waves permits to extend the transmission range in the horizontal direction, for example, for a movable target, the energy transmission is subjected to standing waves resulting in spots along the length of the array with zero available energy. In this work, we show how this problem can be corrected in real-time with simple circuitry and the execution of a comparison algorithm.