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cpw lange

Question asked by mantow on Sep 11, 2006
Latest reply on Sep 20, 2006 by ALEPEREZ

I am trying to use momentum to simulate a CPW lange coupler structure.

As a starting point of the layout, I used a microstrip version, then surround the inputs and coupled sections with "ground" metal as appropriate.

When I try to simulate this with ground references associated with each of the four single-ended ports, momentum gives following error message:

WARNING: Unable to correctly process port XX.
ERROR: Same port assigned to two different segments. Please modify geometry.

The structure simulates fine using single ports with no ground references (as in MS case).