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Conductor-backed coplanar waveguide

Question asked by wyxdy on Feb 24, 2004
Latest reply on Feb 25, 2004 by janvh
I am trying to simulate a conductor-backed coplanar waveguide using ADS with coplanar port in slot-layer? But I've got strange propagation mode coming out which should not.

I am thinking the coplanar port is not compatible with an additional "ground" - the conductor-backing?  

Anybody has the experience or suggestion?