Looking for resources about designing patch array with corporate feed network

hi. i m designing a patch array. i have already designed a square patch operating on 6.5 ghz. now i need to design an array with corporate feed network.can anyone please refer me any material from where i can get some idea. i m using ie3d as a simulator.

please also refer me some basic material on patch array design because being a 3rd year engg student.....this all seems some kind of new study.i have reffered ballanis.....but it doesn't help much...i basically need more of formulas so that i can calculate the widths and lengths of feed lines. please help me.please.......