how to check scane angle in HFSS for floquet port ?

Hi to all;

I am using the floquet-port with master-slave boundaries but the confusion that i am facing is how to check angle of incident wave at the floquet port.

While i follow this procedure Slave->Phase-delay-> phi & theta and have change the values in the phase-delay in slave boundaries where i use phi (Φ) as constant=0 and theta (θ) is variable (θ=30,45,60,75,90 degrees) and get some good results in sence of variations in S21 graph.

but what is input phase delay following the same Slave->Phase-delay->input phase delay

Can any one told me what to do with Phi i.e should it be kept constant or variable like theta?

Secondly am i going in the right direction.