John Doty wrote:
On Mar 26, 2006, at 4:46 PM, DJ Delorie wrote:
AFAIK, a mesh screen is as good as a solid plane if the mesh spacing
is less than the wavelength you're interested in.
Should be quite a bit less. Power leakage goes like the square of the
hole diameter, so for 60 dB of shielding you want holes <0.001
wavelength or so. The details are complicated...
on the topic of shields... it is important to keep in mind that its not
so much the area of a hole in the shield which will get you but rather
the longest dimension. a 1mil x 400 mil slot will probably hurt you
more than a 20 mil x 20 mil hold
-Dan