Wireless charging device
First Claim
Patent Images
1. A wireless charging device comprising a transmitter coupled to at least one transmitting antenna and operable to cause the at least one transmitting antenna to emit electromagnetic radiation;
- a conductive structure adapted to confine the electromagnetic radiation to a charging zone; and
a detector for detecting a degree of impedance mismatch between the transmitter and the at least one transmitting antenna;
wherein the wireless charging device further comprises a controller coupled to the detector so as to receive at least one signal indicating the degree of impedance mismatch from the detector;
wherein the controller is adapted to respond to the degree of impedance mismatch falling below a threshold value by varying a transmission frequency at which the transmitter causes the at least one transmitting antenna to emit electromagnetic radiation over a frequency range and measuring the degree of impedance mismatch at a plurality of frequencies across the frequency range.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless charging device comprises a transmitter coupled to at least one transmitting antenna and operable to cause the at least one transmitting antenna to emit electromagnetic radiation; a conductive structure adapted to confine the electromagnetic radiation to a charging zone; and a detector for detecting a degree of impedance mismatch between the transmitter and the at least one transmitting antenna. A receiver for use with the wireless charging device and a wireless charging system are also disclosed.
-
Citations
20 Claims
-
1. A wireless charging device comprising a transmitter coupled to at least one transmitting antenna and operable to cause the at least one transmitting antenna to emit electromagnetic radiation;
- a conductive structure adapted to confine the electromagnetic radiation to a charging zone; and
a detector for detecting a degree of impedance mismatch between the transmitter and the at least one transmitting antenna;wherein the wireless charging device further comprises a controller coupled to the detector so as to receive at least one signal indicating the degree of impedance mismatch from the detector; wherein the controller is adapted to respond to the degree of impedance mismatch falling below a threshold value by varying a transmission frequency at which the transmitter causes the at least one transmitting antenna to emit electromagnetic radiation over a frequency range and measuring the degree of impedance mismatch at a plurality of frequencies across the frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a conductive structure adapted to confine the electromagnetic radiation to a charging zone; and
-
20. A wireless charging device for charging a chargeable unit, the device comprising a power transmitter coupled to a transmitting antenna for transmitting energy to the chargeable unit, a monitor for monitoring a reflection coefficient S11 of the transmitting antenna, and a controller adapted to respond to the monitored S11 value in at least one of the following ways:
-
a) by varying the power level at which the power transmitter causes the transmitting antenna to transmit energy; b) by varying the frequency at which the power transmitter causes the transmitting antenna to transmit energy; c) by controlling an adaptive impedance matching unit coupled to the power transmitter antenna; and d) by coupling at least one antenna of an antenna array to the power transmitter and/or by adapting the impedance of an adaptive impedance antenna coupled to the power transmitter.
-
Specification