You're almost certainly peering through transparent conductors right now as you read this comment: https://en.wikipedia.org/wiki/Transparent_conducting_film htt

You're almost certainly peering through transparent conductors right now as you read this comment: https://en.wikipedia.org/wiki/Transparent_conducting_film https://en.wikipedia.org/wiki/Transparent_conducting_film The rest of the design is just the usual microwave antenna black magic, but with a different propagation velocity plugged in.