CST Microwave Studio Simulation of Patch Antenna Array

Dear all,

I have design patch antenna array in CST Microwave Studio. I need to obtain accurate acceptable results and my questions are:

1- Do I have to combine the resuts from the transient solver?
2- Do I have to make simultaneous excitation for all the ports?
3- Do you have other ideas or opinions to share with me?

Thank you a lot in advance.