How to preform FEM analysis of CPW line in ADS 2011

Respected all

Can anybody help me out that how to apply ports in ADS 2011 for FEM analysis of a CPW line. The previous version used a different method of making ports as ground reference but ADS2011 does not have the facility to do so.
Please refer to the image shown. I want the central line to be signal and side lines to be ground reference. and i tried to implement the method of slot lines but when i start the FEM analysis it says that magnetic ports are not valid.
PS port 1,2 are input and output (+ve)
and port 3,4,5,6 are (-ve).
As i want the layer connected to port 3,4,5,6 to be ground refference

As already discussed in your other thread:
https://www.edaboard.com/thread315609.html#post1350050

You can't map multiple port references in FEM.

If you insist in using FEM, which makes not much sense, what you can do is to create an underpass (bridge), and then connect the ground port there. But using two references is not possible in FEM in your ADS2011 version, and it is still not possible in the latest version 2014.

Volker Muehlhaus // Agilent Certified Expert EDA

If Sonnet is available, you'd better to use it.Or Momentum..
FEM is not very healthy for planar circuits

Let's say ... it doesn't make much sense if the circuit is strictly planar. More complex math, more complex mesh, more experienced user needed for good results.

The additional difficulty here is that FEM in ADS doesn't accept multiple reference pins for a port, so the model shown above doesn't work as is. Momentum would be the better choice here.

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