In article ,
Tam/WB2TT wrote:

I am curious here. At some point you have to switch from metallic conductors
and antennas to lenses and other optics. Any idea what the highest frequency
RF amplifier works at?

Dunno about an RF amplifier per se.

I do know that there have been some very interesting experiments with
nanotechnology, over the past couple of years, in which tiny carbon
nanotubes have been used as optical-frequency antennas.

http://www.nanowerk.com/spotlight/spotid=1442.php has a brief writeup
on one such.

--
Dave Platt AE6EO
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