Had trouble with crosstalk on a mass of video signals. Cured with a
multilayer board where each signal was 'boxed in' by ground plane to the
sides, above and below. Sort of square coax.
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Boxed ! the wavelength is far greater than
your dimensions , thus higher modes can not
exist , thus you do NOT need sides .
When you reach 10 Ghz , then maybe
you need sides in ur boxed "coax" .
But the big joke , is in the real world ,
they use cheap PCB to xmit 2.5 Ghz .
No strip line , no microstrip , nada ..
It works well , so quit arguing reality .
BTW , i saw some novice , trying to
use juice cans to launch WiFi .
He figured the more cans , the more
gain . He had 3 cans , T'd .
to divide the power .
Gain is not in cans , its in size of
the dish .
Another book worm said all i needed
was $26 for 100 meters of blah blah
coax at 2.5 Ghz ..
10 times that price !
and 1.8" dia hard line !
At these wavelengths , its lower loss
to send it TEM and thru the air ,
not thru a coax .
This is goin to FPGA ? Do those relics
still exist ?! Oh well , i supose ya gotta
try to "protect" your firmware by reinventing
the CPU !