Need info about Suspended Substrate lines

Need information about Suspended Substrate lines: design couplers, filters.
I'll glad, if anybody can point, where I can find it.
Thanks!

Do you mean suspended substrate stripline or suspended substrate microstrip, the lines are a bit different. I can upload some IEEE papers on these lines if you can be more specific.

I dont know about difference between these types. In the literature and Ansoft_Serenade8.5 I've found only Suspended Substrate Transmission Lines.
If possible, upload your papers,please.
Thank you.

Suspended substrate microstip is a microstrip that has substrate "lifted" above ground plane. Suspended substrate stripline has conductor sanwiched between two substrates and air separation between both ground planes. Anyway, these are the papers

flyhigh