Antenna Design Optimization Simulation

I am in need of an expert familiar with High Frequency Structure Simulator (HFSS) software who can assist me in optimizing an antenna design. The purpose of this simulation is to tweak the design for optimal performance. While I did not specify the key performance parameters needing optimization, proficiency in parameters such as gain, bandwidth, and the radiation pattern will be highly beneficial. If you have an in-depth understanding of antenna design principles and have a hands-on approach with HFSS, I'd love to hear from you.