What is the name of microstrip antenna with two substrates?

I have designed a microstrip antenna which have two substrates (ground plane>PTFE Substrate>air gap> PTFE Substrate>patch.What is the name of this microstrip antenna tell me

If there is only one patch on the top of multiple substartes, the antenna name is still ?patch antenna?.

If there are multiple patches on the top of each other, having different or the same type of substrate between them, the name is ?stacked patch antenna?.
http://www.uni-duisburg.de/FB9/HFT/I....2_Sevskiy.PDF

or also,
electromagnetic coupled patch antenna.