hfss measure s21
Hi Shahid,
You don't need dipoles if you want to simulate the S21 properties of an EBG surface.
In HFSS you can put an EBG design (more than 3 cells/mushrooms) at the bottom of a rectangular box. Then you define a PEC BC below the mushrooms (as ground plane), PMC BC in the laterals of the mushrooms (to produce a periodicity) and radiation BC at the top of the EBG cells (you have to design the simulation box with a height much higher than the thickness/height of the mushrooms/cells). Finally, you can use two Waveports at the remaining two faces of the rectangular simulation box. Then, when you simulate, you can easily plot the S11 and S21 parameters between the two Ports when crossing/passing through the EBG cells.
Bye,
Pere