designing a 2x1 dipole antenna array for WLAN application of 2.45GHz

Hi. i am currently designing a 2x1 dipole antenna array for WLAN application of 2.45GHz for my FYP using CST. i need help. can anyone tell me where i can find the calculations needed? i also need help from anyone who are able to tell me how to design a 2x1 dipole using CST from scratch. i seriously need help. urgently.