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Via fences, what are the most important parameters for design

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broncoremy

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What is more important for EMI shielding effectiveness with respect to guard traces and via fences, the width of the copper trace that circles around the area or the distance between the vias to ground that connects to the trace and the other ground planes? Are both equally important or is one important and the other not so much?

Any good web resources out there for this?
 

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