4mil GND trace到底有無效果？

no2892215

When PCB  layout area is not enough, we often use 4mil GND trace to shielding RF clock trace with 4mil spacing.
$ x& f# o6 ]3 ]3 t2 c9 k7 GIs this way enough to avoid RF clock signal to couple other signal trace near the 4mil trace?
' y2 c0 E" k, U; x; IThanks

mic29

u r proposed to refer to 3W rule.  
when clock trace is 5 mils, u will need 10 mils spacing.
of course GND trace will help, but PTH through holes with proper interval will do it better.
! z+ [! C& z# a2 R& L. w) p
7 |# B. P, `. ^& y4 ggoogle it for detailed information, please!