Controlling field distribution of a wireless power transmitter

摘要

Exemplary embodiments are directed to control of field distribution of a wireless power transmitter. A transmitter may include a transmit antenna configured to generate a field. The transmitter may further include least one parasitic antenna proximate the transmit antenna and configured to modify a distribution of the generated field.

主权项

1. A transmitter for wirelessly transferring power to a receiver device, comprising:
a transmit antenna configured to generate a first magnetic field for wirelessly transferring power to the receiver device, the transmit antenna comprising a first resonant circuit configured to resonate at a first frequency corresponding to an operating frequency; at least one parasitic antenna comprising a second resonant circuit configured to resonate at a second frequency different than the operating frequency; and a controller configured to activate the at least one parasitic antenna that is configured to steer the first magnetic field generated by the transmit antenna to a charging region when activated.