pso for patch antenna

Good Day everyone, I'm from Malaysia and currently doing a project on:

"Optimization of Microstrip Patch Antenna Using Particle Swarm Optimization"

i have done the literature review on PSO and pratical training, doing exercise on antenna design using IE3D.for IE3D antenna design software i still can handle it, but for PSO optimisation, i'm confusing on it.

Well, PSO is a new thing for me and i also hv not much knowledge on antenna design, but i'm sure i will try my best to do that.

Basically, I'm clear with PSO theory and i'm ready to write the coding on it, but i don't know how to implement the PSO into the antenna design... or simply said, i am confusing on where to start to do my optimisation on the patch antenna...and
how to find the fitness function from my antenna.

so, i'm here kindly seeking for guidance from you all on where to start , or steps to optimise the antenna using PSO ....and i really hope to get any resources or ebooks on PSO on antenna design or others related study items..

Thank you all so much...sorry for poor English.
:D

anyone can help?