this post was submitted on 26 Jul 2024
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Researchers discover battery-free technology which harvests power from radio and Wi-Fi signals for low-powered devices (www.tomshardware.com)
submitted 3 months ago by [email protected] to c/[email protected]
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cross-posted from: https://lemmy.ml/post/18426215

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[–] [email protected] 1 points 3 months ago* (last edited 3 months ago)

https://en.m.wikipedia.org/wiki/Rectenna

What they've done here is use the very old existing rectenna technology and new types of nanoscale rectenna arrays to capture very low energy radio waves without an external antenna. We're taking -20 dBm or 10 μW.

In the end, I welcome any rectenna advances because if we ever build an efficient optical rectenna it'll blow photovoltaics out of the water by efficiency. Optical rectennas are like fusion power in just how revolutionary they would be to our energy economy.