Patent ID: 8965461
Filing Date: 2015-02-24
Classification: G06K,H01F,H01Q,H02J,H04B

Abstract:
1. A wireless power receiver, comprising: a resonant receive antenna circuit configured to wirelessly receive power via an electromagnetic field generated by a wireless power transmit antenna, the received power at a level sufficient to charge or power a load, the resonant receive antenna circuit further configured to resonate at a frequency of the electromagnetic field generated by the wireless power transmit antenna; and a switching circuit operably coupled to the resonant receive antenna circuit, the switching circuit configured to change a resonant frequency of the resonant receive antenna circuit when the switching circuit is in a first state and configured to enable the resonant receive antenna circuit to resonate at the frequency of the electromagnetic field when the switching circuit is in a second state, the switching circuit configured to switch between the first state and the second state based on signaling values generated for sending information to the wireless power transmit antenna.