This idea has been floating around in my head before, and sure enough, it's a pretty hot topic of study right now. Here's a small introduction to what it is.
http://www.gizmag.com/scavenging-ambient-electromagnetic-energy/19163/
My question is, what happens when a lot of these devices are being used? The stations that generate the signals powering scavenging devices would have to up their power output in order to reach the same range they do today, wouldn't they?
And from another perspective: This is a form of energy robbery. I wonder if there would be any legal implications with using scavenging devices?
http://www.gizmag.com/scavenging-ambient-electromagnetic-energy/19163/
My question is, what happens when a lot of these devices are being used? The stations that generate the signals powering scavenging devices would have to up their power output in order to reach the same range they do today, wouldn't they?
And from another perspective: This is a form of energy robbery. I wonder if there would be any legal implications with using scavenging devices?