I do not exactly get your point. Are you trying to excite the structure using several ports and you want to assign to each one of them different amplitude and phase ?
I am also tryijg to specify the angle of Excitation.
@zrym2005...have u got the answer of your question? if yes please also inform me about this.
@adel_48...I want to use a single port and excite it on a spcified angle...Right now my waveguide port is at the top of my structure and the angle of excitation is 90 degree (I believe).