Designing some types of couplers using ADS (Advanced System Design) or any preferable software.

I am an electrical engineer working on a research project dealing with multi port networks. I have some designs of couplers ( branch line and ring) with the required parameters for each, I need to perform a little bit of adjustments and modifications to reach the optimized results. If you have any experience with this software please contact me to show you the designs that need to be implemented in ADS. and from there we will negotiate the expenses rate and the handover of the project.