Wireless Charging Start-Up Claims 30-Foot Radius 242
Lucas123 writes "At Disrupt this week, Ossia Inc. demonstrated for the first time its wireless charging technology that founder Hatem Zeine said has a 30-foot radius and, like WiFi, can charge through walls and 'around corners.' The technology, still in prototype phase, uses the same spectrum as other wireless standards, such as WiFi and Bluetooth. The Cota wireless charging system includes a charger and a receiver — either a dongle device or chip-tech integrated into a product, such as a smartphone or battery. While it has yet to be miniaturized, Zeine said the wireless technology will eventually be small enough to fit into a AAA battery or any portable electronic device. While the technology has wider industrial implications, as a consumer product, a charging unit will likely sell for around $100, he said."
Re:Holy EMF Batman? (Score:5, Interesting)
Well many homes already posess a 2.4GHz ISM band field generator, a few minor modification to the door interlock any you have just saved yourself $100.....
The trouble with shrinking this sort of thing is that it moves you from a near field situation, where coupling is largely magnetic, to a far field one where coupling is electromagnetic (Yes I know they both are really electromagnetic, bear with me), and that raises interesting questions of physics, and also of local power density close to the transmitter.
Now, there is also the health physics questions which for a non ionising EM field at 2.4Ghz come down to considering thermal effects. At 2.4Ghz this largely comes down to thermal effects in the skin and other surface layers (2.4GHz is used in microwave ovens for a reason, water has an absorbtion band there), the surface layer that **REALLY** matters in this is the eye! A few watts per square metre power flux density is probably not too much of a problem, much more might be.
I smell a startup about to try for some more funding!
73 M0HCN.
Re:Supercharging the cells with ions ! (Score:4, Interesting)
there are evidences of plants under WIFI frequency bombardments having retarded growth
Links or it didn't happen.
Links ! (Score:3, Interesting)
there are evidences of plants under WIFI frequency bombardments having retarded growth
Links or it didn't happen
Links, with pictures
http://abcnews.go.com/blogs/technology/2013/05/can-wifi-signals-stunt-plant-growth/ [go.com]
http://www.mnn.com/health/healthy-spaces/blogs/student-science-experiment-finds-plants-wont-grow-near-wi-fi-router [mnn.com]
Now, satisfied ?