CST studio Project Designing UHF RFID

I'm working on CST studio. I need to design RFID at 922.5 MHz on FR-4 substrate,so how do I design IC chip for the circuit on cst studio? Is there any way to do this?plz tell me the steps or any video will help or cst file.The chip is NXP UCODE G2XL,which not aavailable online now.