CST stacked patch simulation problem

hey guys, can you please tell me what i did wrong in my simulation..
i am simulating a stacked patch antenna and i am getting horrible s11 parameter values..
i've read papers and i believe i am doing good in terms of the theory part and so i think it must be with the simulation..
the antenna is for Wi-Fi (2.45GHz) and i used stacked patch so that i can increase the bandwidth of a single patch antenna..
i've attached my simulation file

here is my attached file: stackedpatch.zip

hi
1-if u attach u simulation it more possible for other to help u
2-your simulation dont have horrible S
3-its may related to your antenna feed and port which u define for this

there is an attached file below the figure named stackedpatch.zip you can just click it to download it

hi
your CST version is higher than mine i cant open it

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