Design ARC/Curve microstrip line with given width at CST

I want to reduce insertaion loss of 1:2 Wilkinson cascade divider for freq. 110 GHz...
How can I need to use the arc function at CST to design curve line at given width?
Can someone upload a video of an example?

Hey,
I am designing a radial power combiner and need help with curved microstrip line. Can you help me ?