currently i doing thesis on patch antenna over EBG, so my lecturer ask me whether EBG still in research or already in the market use like a commercial product in use...
I don't think that there is a product availiable at the moment, besides they are trying to integrate some of MTM structures in some high frequency antennas. Your lecturers should have a better view on that idea...but for sure there are Ph.D students who are publishing on EBGs.As for the patch antenna on the EBG it is sth for which a lot of papers have been published.