Hi, Thank you so much for your reply!

I searched for "Finite DDM Wizard". Ansys documentation referring to the unit cell design with domain decomposition. Actually I tried with the master and slave boundary condition to design a finite array. It showing unexpected results. Furthermore, the array antenna I am trying to design has a hexagonal shape as shown below. If you kindly give me a hint that, how can I use the Finite DDM Wizard for the hexagonal shaped finite array? Can you please direct me to the documentation of such design? Again, thanks a lot. It means a lot.