Dear SIlisters,
I did some quick sims sweeping different gaps b/w the stitching ground vias
and tline (Note here the gap refers to the spacing b/w the via and the
tline, not two adjacent ground vias for which I set to twentith lambda)
using 2.5D tool and the results are almost the same. Does anyone have this
experience, such as whether I need to do the sim in 3D, or what distance is
recommended? I saw some implementations put the via at the distance of
merely 4mil while the others do it w/ 20mil. So how on earth is the impact?
--
Best Regards,
Tramp
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