Hi,
I was following some KiCon talks and I have noticed this nice one:
"Effective RF And Microwave Design With KiCad" - Seth Hillbrand (KiCon 2019)
At time 3m39s there are some interesting notes on rounded tracks:
Then @Seth_h, thanks for sharing this interesting talk 
This is useful to know. In my case I need rounded tracks for flex PCBs which means there can be quite a bit of variation and I’m not sure using custom footprints would work very well when there are so many different cases I need to consider.
From now it is clear that round tracks would be useful for KiCAD both for RF design and for other user’s cases …
@Seth_h may I ask you if is there a short plan to implement round tracks in KiCAD v6?
From the official roadmap http://docs.kicad.org/doxygen/v6_road_map.html#v6_pcbnew
I cannot find anything about implementing round tracks, apart something related to pad shapes:
Microwave tools to be added as parameterized shapes generated by Python scripts.
Thanks in advance for any insight,
Maurice
Work in progress [1]. Groundwork is basically complete. The last hurdle is pushing the arcs around in the router. Should be in merge review sometime next month.
[1] https://code.launchpad.net/~sethh/kicad/+git/kicad/+ref/curved_tracks
Thanks a lot! This will place Kicad a step forward in RF designing arena.
I fully agree that it will be good for kicad.
What i really like is that this is data driven instead of “everyone says it is that way”. (Which also gives us a way to “counter” (lack of better word) some requests for this feature with “what frequency are you working on?” Allowing us to defuse discussions about this in the future. Well the fact that this feature is near to be added also makes it easier to avoid such discussions by pointing users who really need it towards nightlies of course with the massive disclaimers about their instability.)
For microwave RF, tapered tracks become important
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