Copanar Strips OR Coplanar Strip lines

Hi

I mixed up about coplanar transmission lines!

for a single line we have :

microstip line ---> One line on a substrate
strip line ---> one line sandwiched between two dielectrics

about coplanars

two line sandwiched between two dielectrics are called coplanar stripline in all references

but for two line on a substrate (the upper side is air) are called coplanar stripline in some references, coplanar strips in other and even coplanar microstrips in some cases, and I read somewhere that there is no coplanar microstrip name!

Please help me!

What are the right names ?

Two parallel lines in same plane is co-planar transmission lines.
If these transmission line is microstrip nature then it is co-planer microstrip transmission line and the same is applicable to strip line.
Hope this make you better understand.

Thanks for your answer

Yes I think so and with your answer 2 line on a substrate is a coplanar microstip but in papers I see they name it coplanar strips or even coplanar striplines in some cases!

I too need info on this. I have a project where I have differential inputs/outputs, and i want to run coplanar strips on the top surface of the board, but underneath the dielectric is a ground plane also. What is this called? "Coplanar strips with ground plane", "coplanar microstrip"? There is no ground plane on the top surface, only below the dielectric.

If you have access to MWO you find a model named SS2CLIN (Symmetric Edge Coupled Stripline) which is a two-edge coupled stripline on a single layer substrate elevated over the ground plane (with no ground on the surface).
I think is available on ADS too, but when I speak about transmission line models I trust more AWR.