Phased array antennas in HFSS

Hello. I have designed a conformal antenna for my theses. I am feeding it with coaxial cable. [actually an SMA]. The exciatation right now is a wave port. I have to place more antennas around the body [biomedical application] and these must have phase shifted excitation. I have looked the things I can define in "wave port" excitation but I havent managed to find a way to "put" this phase shift.

Does anyone know how could I perhaps do it through HFSS? [I am currently working in version 10]

Thank you very much in advance...