HFSS waveport sizing guidelines for a Co-planar stripline?

Hello All,

I have been working on a project in HFSS which requires me to use a coplanar stripline. A diagrammatic representation of a coplanar stripline is shown in the attachment to avoid any confusion with a stripline or a coplanar waveguide, the waveport sizing guidelines of which are very clear.

I came across some threads as shown below which made an attempt to answer the question but the answers were not satisfactory as the questions were either misconstrued or left unanswered.
https://www.edaboard.com/thread223170.html
https://www.edaboard.com/thread220525.html

I would really appreciate if someone could guide me to model the waveport for a coplanar stripline through documents or explanations.

Thanks,

Vivek