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.
, C9 S) V. g' O1 h, u" gIs this way enough to avoid RF clock signal to couple other signal trace near the 4mil trace?
Thanks

mic29

u r proposed to refer to 3W rule.  
when clock trace is 5 mils, u will need 10 mils spacing.
' P: ]' |, n& |: {+ o5 rof course GND trace will help, but PTH through holes with proper interval will do it better.
1 j6 d2 A5 x1 n5 o2 n
' X% u# B. p, \google it for detailed information, please!