I use Altium and therefor I am not all that familiar with Cadence. Do you know what files you are able to import into Cadence? if you know what files you are able to convert into Cadence I would be happy to convert your HFSS design into that file format (My mechanical engineers work with solid works and that seems to be able to convert any format to any other format). I can also convert your balun into a gerber format and send it back to you. Let me know if there is a way I can help or a file format you want it your balun in,
B