100 antenna array simulation

hi all,
I would like to simulate 100 antenna array (microtrip) using ADS, in 100 GHz.

Do I need to simulate all of the S-parameters (too many!) ?

If not, could you tell me which paramaters should be focus on?

More question, can I simulate antenna array by ADS or should I use another?

Thank you

If the array is in symmetry condition, you can simply the results case by case.

thank you. Could you please tell me in detail ?

for concern on mutual coupling, we just observe one element and the near surrounding 3~4 elements. This concern is based on the mutual impedance calculation in "Analysis and design of coplanar waveguide-fed slot antenna array," IEEE Transactions on AP 1999.
So it's the first step for simplifying the analysis of antenna array.
If you have a uniform array, then you just only pay attention to the "15 ports" by symmetry.
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You can use floquet boundary condition if the array is periodic

thank you to all.

To weiweia: thank you for your kind help. I tried to read the IEEE paper as your comment, but it's quite hard for me to understand.
Could you please help me step by step, or suggest me another easier docments?

In details, I already simulated 3x3 antenna array to find S-parameters, and then what should I do the next? Please, urgent!