2x2 array antenna at imt 2000 band...

hello..

could anyone plzz help me in designing this 2x2 array antenna for imt 2000..

how about the feeding techniques..i used to design a rectangular patch..

my plan is using FR4 board..or any suggestion with RT duroid..

do you guys have any ebooks or thesis that can help me in design this..?

plz...