Disney researchers have created a system for wirelessly transmitting power:
Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer (open, DOI: 10.1371/journal.pone.0169045) (DX)
Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within. A theoretical model of a quasistatic cavity resonator is derived, and field distributions along with power transfer efficiency are validated against measured results. An experimental demonstration shows that a 54 m3 QSCR room can deliver power to small coil receivers in nearly any position with 40% to 95% efficiency. Finally, a detailed safety analysis shows that up to 1900 watts can be transmitted to a coil receiver enabling safe and ubiquitous wireless power.
Also at Disney Research and NBF.
(Score: 0) by Anonymous Coward on Friday February 17 2017, @04:08PM
The authors built and demonstrated their room. If a person formed their arms into a large circle with the fingertips almost touching (this is called a Hertzian resonator after Heinrich Hertz) aligned for strongest coupling to the magnetic field, they could get 100 volts and a small spark between their fingertips.
(Score: 0) by Anonymous Coward on Friday February 17 2017, @04:36PM
Isn't this like being inside a big microwave oven?
How warm will my belt buckle get? (or metal ring on my finger)
Will it trash the RFID chip in my Passport? (this could be a good thing...)
What happens to the input stage for the Wi-Fi or cellular receiver in my laptop or phone??
(Score: 0) by Anonymous Coward on Friday February 17 2017, @05:39PM
This was not in the linked paper. Where do you get this idea?
Also, 100 Volts is not enough to jump much distance at all in air, and the paper did some simulation that indicates poor coupling of the EM fields to human body tissue.