With the "new" implementation of WattUp power transmitters (http://www.energous.com/transmitters/) the 5.8Ghz band for RC control is going to get a lot more congested...
Very interesting stuff... phased array antennas etc.. but a lot more "noise" on 5.8Ghz :-(
WattUp™ transmitters, or power routers, deliver power within a 15-foot radius of where they are installed, creating a 30-foot envelope of wire-free charging space...
The system delivers an average of 2W to 4 devices simultaneously within this 15-foot radius (30 foot span). Proximity to the transmitter impacts power delivery as follows:
4W delivered to 4 devices simultaneously within 0-5 feet
2W delivered to 4 devices simultaneously within 5-10 feet
1W delivered to 4 devices simultaneously within 10-15 feet
Very interesting stuff... phased array antennas etc.. but a lot more "noise" on 5.8Ghz :-(