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.
) |4 i$ r1 v4 R2 o  c, \Is this way enough to avoid RF clock signal to couple other signal trace near the 4mil trace?
& B2 X7 O. \8 G+ @Thanks

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.

$ f/ |& P' h3 F* S: ]3 c0 \google it for detailed information, please!