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How do I subtract metal around a via passing through a ground-flood for EM Extraction in Microwave Office?

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Hello all,

If I send a VIA element through a large MLIN, how can I prevent the VIA from contacting the MLIN? 

  • I read about negative layers, but couldn't find anything about +/- layers with EM extraction: does it also work for EM extraction?
  • Are VIA and MLIN the right elements to use for this purpose, or should I use something else for a "ground-flood" or a different VIA element?
  • How can I "easily" place that "ring of dielectric" around the via as it passes through the ground layer defined by the large MLIN---and by "easily" I mean to have the negative ring  "snap" around the via on the ground layer---or some other automatic way of doing this.

Thank you for your help!

-Eric


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