Ports for Coplanar Waveguide Simulation

Hi,
For defining the ports for coplanar waveguide simulation in HFSS, I followed the ports dimensions as given inHFSS handbook. ie., Port height is atleast 4h and Port width atleast 3-5g and port outline intersects side grounds. I was able to simulate, but I have a question:

Since the waveport is touching the side ground planes, Are the gound planes also excited along with the signal conductor ? and How to make sure that the ground planes are not excited.

Thanks in advance,
sv

I have responded to this question a number of times in the past. Use the search feature to find those responses. Numerous others have also provided guidance on the same subject.

I can suggest you also to see here:

uWaveRF - View topic - cpw design hfss- defining port &assigning boundary?

where is posted a tutorial...about cpw in HFSS