How to assign excitation to ports HFSS

I am trying to simulate cpw inductor in HFSS as shown in fig.
Both ground and coil are of Gold material.
I am confused about boundary condition and excitation.

I have assigned ground and signal line as PerfE boundary. Air as Rad as shown in example. When I simulated following error message as has come.


[warning] Warning - Boundary "Rad1' and Boundary 'PerfE1' overlap. (6:36 PM Jun 15, 2011)
[warning] Warning - Boundary 'Rad1' and Boundary 'PerfE2' overlap. (6:36 PM Jun 15, 2011)
[warning] Warning - Boundary 'Rad1' and Boundary 'PerfE3' overlap. (6:36 PM Jun 15, 2011)
[warning] Warning - Boundary 'PerfE1' and Boundary 'PerfE2' overlap. (6:36 PM Jun 15, 2011)
[warning] Warning - Boundary 'PerfE1' and Boundary 'PerfE3' overlap. (6:36 PM Jun 15, 2011)
[warning] Boundary 'Rad1': A radiation boundary face has solid objects with SolveInside on both sides of it. Please check setup, as this could produce incorrect results. (6:36 PM Jun 15, 2011)
[error] Port refinement, process hf3d error: Failure in solving the ports.. (6:38 PM Jun 15, 2011)
[error] Simulation completed with execution error on server: Local Machine. (6:38 PM Jun 15, 2011)



Please give me proper settings in boundary condition and port excitation.

Your error is not due to your port. It is due to the fact that your radiation boundary is intersecting though an object in your model. Make sure your radiation boundaries are only on the outer most faces of an airbox.

Have Fun

Thanks for reply. Yes the problem was "radiation boundary was intersecting though an object". Now I solved it.

But now also I am still confused about assign excitation to cpw kind of inductor.

Is reference conductor means ground?
If so, how to select two grounds as one reference conductor in Lumped port excitation.