Differential pair - Unable to tune skew/phase


When i set the differential pair gap lower then 0.18 mm i can’t tune the skew/phase (include track length). Tuning differential pair length works OK.

I checked the design rules and everything looks good.

kicad version: 53204e097 - x86_64

Any ideas?


There is a separate setting for differential routing that’s not in the design rules section.


And where i can find it?


dimensions -> differential pair.
Not sure if this exists in stable.


Nope, this is only the basic setup of differntial pair… There is no other options to change some limits?


I fear this is everything that exists in the current software. Maybe there are some specialized builds out there that have better support for such things. I think there is a RF build somewhere.