salam

az floque port ehtemalan batad estefade konid. 

hi dear.

fleqetport exactly used planar-periodic structures

thanks compatriot.just shz

Can you explain how you've set up your model, or how you intend to model your reflectarray? What boundary conditions have you already set up for your model? If the structure in your image is finite you could use a plane wave excitation.

My simulation based on paper.how can consider boundry condidtion with excition?

I recommend you using CST 2015 and above, because it Gaphene material, and you can assign it to every surfaces you want and just giving Gaphene parameters.

So you does not need define boundary condition for it, and you can behave with that, like other antennas.