I was surprised to learn the rectenna was invented as recently as the 1960s: https://en.m.wikipedia.org/wiki/Rectenna https://en.m.wikipedia.org/wiki/Rectenna

I was surprised to learn the rectenna was invented as recently as the 1960s: https://en.m.wikipedia.org/wiki/Rectenna https://en.m.wikipedia.org/wiki/Rectenna And in 2015, the optical rectenna: https://www.me.gatech.edu/featured_colarectenna https://www.me.gatech.edu/featured_colarectenna