On Fri, Jun 08, 2007 at 11:43:01AM +0530, Gautam John wrote:
> Ars have a good write-up.
>
> http://arstechnica.com/news.ars/post/20070607-remote-laptop-power-up-not-anytime-soon.html
For some applications (mobile gadget chargers) you don't care about efficiency
(wall warts, ahem), you care about the key feature (lack of wires).
Rectenna arrays already exceed 80% efficiency, I presume it would be
possible to buld 89-90% overall efficiency phased-array radiators/rectenna array
wireless power distribution.
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/9277/29524/01338912.pdf
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