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Via Fencing Clearance for CPW Structure

rayansyd

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Hi everyone,

I'm a beginner in PCB design, and I've been working on a coplanar waveguide (CPW) structure for an RF signal on my PCB. Here are the details of my design:

  • Signal Trace Width: 1 mm
  • Clearance for 50 Ohm Impedance Matching: 0.2 mm
  • Board Length: 50 mm

I'm currently at the stage of adding via fencing to this CPW structure and need some advice. Specifically, how much clearance should I maintain between the vias and the edge of the RF signal trace to ensure effective shielding and optimal performance?

Any guidance or tips would be greatly appreciated
 

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