Patent ID: 9391442
Filing Date: 2016-07-12
CPC Classification: H02H,H02J,H04B

Claim Text:
1. A wireless power transmission device, the device comprising: a transmit antenna; a transmit circuit configured to generate a power transmit signal for powering the transmit antenna to generate a wireless field sufficient for wirelessly charging another device; a switch configured to electrically couple the transmit antenna and the transmit circuit; a detection circuit configured to sense a strength of an electromagnetic field received by the transmit antenna and further configured to generate a sense signal indicating the strength of the electromagnetic field received by the transmit antenna; and a power control circuit configured to receive the sense signal from the detection circuit and control the switch, based at least on the sense signal, to attenuate the electrical coupling between the transmit antenna and the transmit circuit such that the received electromagnetic field is inhibited from damaging at least one of the transmit antenna or the transmit circuit through the electrical coupling.