microstrip patch antenna array 1X2

hello

i am designing a 1 by 2 array of microstrip patch antenna.Please suggest me some good literature or book on the designing of the array. I am facing problems in designing the microstrip transmission line used to feed power to the antenna elements also known as the power splitter. I hav designed the single elements of the array using HFSS v11.

thanx

apurv

CAD of Microstrip Antennas for Wireless Applications (Artech House Antennas and Propagation Library) by Robert A. Sainati
This is a very practical book. It's out of print but it is worth trying to get it.

Oops
Just googling a bit and it's just there
http://www.iran-eng.com/showthread.php?t=13838