[ASK] how to fabrication the dielectric layer setting like this on AWR MWO

dear all

I'm initially design an UWB microstrip antenna using MWO, at first I use 2 layers, layer 1 for air, and layer 2 for substrate. to achieve a target (S11 <-10) I had intended to use a groundplane by adding third layer with setting like on image. But without forming the ground patch on layer 3, there was a significant change and I got approach achieved goal. In other word I still use 1 patch on layer 2 but with 3 layers setting.

I want to ask how the antenna structure to be fabricated on RT/Duroid 5880 board, can anyone show example a fabricated MSA like that setting

thank before