Re: Mixer Balun Desig in ADS
Since you are working in Uwave frequencies, your balun should be made by Tlines(Distributed), you can check lange coupler and wilkinson divider topologies for distributed balun designs.
You need lange coupler to create phase difference required between outputs, and wilkinson divider to create 2 outputs with equal amplitude.
Integrated Baluns tend to have active components inside, but that is another topic of interest, mainly for IC designers.
Hope it helps.