Hi!
I am not an expert in antenna design, but I have some experience, mainly with microstrip and patch antennas.
I am familiar with the use of Feko (MoM), ADS and Quqs, but if you prefer I can work in Comsol.
In my portfolio I have an example of a patch antenna that I calculated, simulated, built and measured. This one worked great!
If you want I can help you. Thanks!!