Reflectarray Antenna - CST - Dielectric Resonator

Can anyone help in step by step procedure to carry out Phasing characteristics in the design of DRA based Reflect arrays?
I'm confused with how to implement unit cell problem in Transient solver.

there are many papers about DRA reflectarray
started by Prof.Antar,2000 and followed by new papers from 2009 URSI egypt and you can get them from IEEE