Author Archives: muehlhaus

Open Source EM: New user friendly openEMS workflow for SG13G2

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At FSiC 2025, I presented a new user friendly openEMS workflow, with many improvements over using native openEMS, e.g. automatic meshing.

Conference slides
Github download

The files provided here enable openEMS EM simulation with layouts created for the IHP SG13G2 RFIC technology.

The difference to the workflow available at https://github.com/IHP-GmbH/IHP-Open-PDK/tree/main/ihp-sg13g2/libs.tech/openems is that we now have an additional layer of abstraction, to simplify the re-use of model code and enable this new functionality:

  • Automatic mesh generation
  • The model code can load files directly from GDSII
  • Ports (in-plane or via port) are defined in GDSII file on special layers
  • The technology stackup is read from an XML file
  • Merging of via arrays is supported
  • Touchstone SnP file output is supported

Overall, models in this new workflow looks much cleaner because most “routine” stuff is moved into external libraries.