cst simulation for van atta array ?

hi there !

i want to make a 2 & 4 element van atta array in cst, i can make the structure but screwed with the simulation part ..
please dont ignore this its really very important, the link to the paper i am following is http://www.researchgate.net/publicat...ent_Structures

i've got to do the same work for 2.670 GHz.

van atta design imp.pdf