[Arm-netbook] HDMI High-Frequency Layout: Recommendations

[Richard Wilbur]

Be careful in the wiggles if you make a high-frequency trace turn
parallel to itself that those parallel sections are at least separated
by a distance of 4*trace width=20mil.  Otherwise the parallel sections
look like antennae to the high-frequency signals which simply radiate
straight across and bypass the intended delay path.

In other words if the edge of the copper of a trace faces a different
part of the same trace, the electric field will overlap significantly
if they aren't far enough apart and the signal will jump the gap.

I painted the likely problematic edges with red and circled in green
the wiggle you created with a geometry that completely avoids the
problem.
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