I found in the Internet a new tool that can produce kicad layout of microstrip circuits from qucs schematics: https://github.com/thomaslepoix/Qucs-RFlayout
I’ve just started using it and I really like it, so I’d like to let you know that it exist.
This is useful because I don’t need to draw footprints of all the strips from simulation. Just go straight from qucs simulation to kicad footprints.