Other articles on this:<p><a href="https://news.ycombinator.com/item?id=10308511" rel="nofollow">https://news.ycombinator.com/item?id=10308511</a><p><a href="https://news.ycombinator.com/item?id=10306293" rel="nofollow">https://news.ycombinator.com/item?id=10306293</a><p><a href="https://news.ycombinator.com/item?id=10304387" rel="nofollow">https://news.ycombinator.com/item?id=10304387</a>
<i>We asked Lord Drayson if there were any limits on the number of Freevolt harvesters in a given area, or if there was a critical number of harvesters that would then impact cellular or Wi-Fi signal reception. He said "no" in both cases.</i><p>Both these answers are simply wrong - they are absorbing power from the RF spectrum. Of course there will be some impact.
This technique was already used in the 1930s by people living close to the powerful AM transmitters in Berlin and Hamburg to run electric lights. It was outlawed, though.