Dear Thorsten,
It's advertisement time!
I wrote the Qucs-RFlayout tool to export microstrip Qucs schematics to PCB layout tools such as KiCad PcbNew and I just add an interface to export OpenEMS scripts.
It produces the whole script with its own command line interface to be as user friendly as possible. Plus I tried to embed quite complete and general postprocessing capabilities. (I also created two new Octave functions based on plotRefl.m and plotFF3D.m, I will do a PR soon.)
Here is the development version :
https://github.com/thomaslepoix/Qucs-RFlayout/tree/dev
And there is a tutorial :
https://github.com/thomaslepoix/Qucs-RF ... openems.md
Waiting for your feedback

Best regards,
PS : To jcyrax from pcbmodelgen, matthuszagh from pyems, michal777 from openems_wizard_draft. If you read this, please contact me, I think we should work together to make our tools converge to a coherent user experience. thomas.lepoix@protonmail.ch