Create/Modify Substrate ADS

Hi folks
I am working in Aperture coupled Micro strip Antenna design in ADS.
I am using ADS Momentum for stimulation purpose. There will be three layers in the design
PATCH SUBSTRATE
GROUND(APERTURE)
FEED LINE SUBSTRATE

I don't know how to use the create modify/substrate for implementing the same in ADS.
I have previously used create /modify substrate for stimulating a narrow band patch antenna but that had only one substrate(patch)
Freespace
substrate
gnd

申明：网友回复良莠不齐，仅供参考。如需专业帮助，请学习易迪拓培训专家讲授的ADS视频培训课程。