Posted by Snoshoe on Apr 21, 2010; 7:06am
URL: https://www.es-forum.com/RADAR-HELP-tp1553465p1553629.html

Radar has a number of types, and a huge range of frequencies:

P-Band – 30 - 100 cm (1 - 0.3 GHz)
L-Band – 15 - 30 cm (2 - 1 GHz)
S-Band – 8 - 15 cm (4 - 2 GHz)
C-Band – 4 - 8 cm (8 - 4 GHz)
X-Band – 2.5 - 4 cm (12 - 8 GHz)
K-Band – Ku: 1.7 - 2.5 cm (18 - 12 GHz); Ka: 0.75 - 1.2 cm (40 - 27 GHz).
http://en.wikipedia.org/wiki/History_of_radar#United_States

Also Ka 33.4 - 36.0 GHz and IR -- Infrared 332 THz 904 nm Laser Radar
http://www.copradar.com/preview/chapt6/ch6d1.html

So it's going to depend on the part of the spectrum it's in, infrared, microwave, etc., on what you are going to need to shield it with. Whatever is the most multipurpose you can find is probably the best idea.

~ Snoshoe

--- In [hidden email], S Andreason <sandreas41@...> wrote:
>
> K wrote:
> > I was educated yesterday by the lessemf.com guys that radar is at 77 ghz.
>