maemo.org - Talk - View Single Post - Nokia prototype recharges batteries with radio waves

attila77	2009-06-16 , 21:57
Posts: 3,319 \| Thanked: 5,610 times \| Joined on Aug 2008 @ Finland	#6

Originally Posted by Lord Raiden

While there's enough EM radiation to make this work well in urban environment, what about rural areas where there's not much of any EM radiation to speak of?

That really depends on the frequency. Even without human sources you will have SOME EM radiation everywhere. Now, if you're not near short-range pesky microwave sources, the ones who might curse you for leeching will be cellular operators, radio stations, terrestrial TV stations, wimax folks, basically anyone who does long-range wireless communications.

PS. The idea is not really lab-tech - I remember making detector/crystal radios when I was a kid, those were simple shortwave receivers that were getting both signal and power through antennas. Cool stuff (even by todays standards), but when harvesting EM waves, you want BIG ANTENNAS

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