  We present an omnidirectional wireless power transfer (WPT) system capable of
automatic power flow control using three orthogonal transmitter (Tx)-repeater
(Rp) pairs. The power drawn from each transmitter is automatically adjusted
depending on the mutual inductance between the receiver and the Tx-Rp pair. The
proposed approach enables the receiver to harvest almost uniform power with
high efficiency (90\%) regardless of its position.
