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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › 180 Degree Phase Shift When Measuring S21 › Reply To: 180 Degree Phase Shift When Measuring S21

October 4, 2024 at 8:03 am
David Prestaux
Ansys Employee

Hello, radiation boundary for the whole structure or around each of the horn? it will only work for the whole structure.

I think maybe you see some difference because you are not maintaining the same distance between the antenna as you rotate. Have you tried it with short or small distance? at short distance, this may not be obvious to define the rotation around the phase center of the antenna which would be close to the center. In summary, I don't see any reason why the results you're getting should be wrong and given that you created the integration line and converged well....you can check the convergence of the S21 phase to see its variation...you are getting the correct result.