WIRELESS POWER TRANSMISSION

Wireless power transmission.

One embodiment provides an apparatus for wireless power transmission, comprising: a resonator comprising: a three dimensional structure; and an energy storage mechanism operatively coupled to the three dimensional structure; wherein the three dimensional structure and energy storage mechanism produce standing electromagnetic waves upon driving the resonator. Other systems, methods, apparatuses, and products are described and claimed.

BACKGROUND

Wireless power transfer (WPT) includes wireless techniques for providing power to electrical systems, for example, charging batteries, charging battery powered devices, powering electrical devices, and the like. Known WPT techniques require close proximity between the source providing the electrical power and the device being powered. For example, near-field manetoquasistatic (MQS) WPT and inductive charging are capable of charging a device (e.g., smartphone, tablet, toy, or other device having an electrical circuit) by bringing the device within close proximity to a charging source. Common examples of include charging an electric toothbrush in a charging stand, using a power transfer mat to charge a cell phone, and the like. However, these WPT methods require close receiver to transmitter separation as well as precise receiver orientation to accomplish WPT with high efficiency.

Other WPT methods include far-field techniques which can provide power to receivers over longer distances. For example, broadcast far-field WPT is capable of transferring power at greater distances, e.g., to a radio frequency identification (RFID) tag. However, this broadcast technique is not efficient in that commonly less than 0.1% of the source power is provided to the target device. Additionally, regulations (which vary by jurisdiction) limit the amount of power that can be transferred using such techniques. While point-to-point far-field WPT systems maintain higher end-to-e