The topic is misplaced: you should put it not in the "Digital Communication" forum, but in "RF, Microwave, Antennas and Optics".
Try to look at the bibliography about phased array antennas, e.g. Hansen or Mailloux books about Phased Arrays.
Regards
Try to look for:
R. Hansen: Phased Array Antennas, Second Edition - Wiley Series in Microwave and Optical Engineering, 2009
R. Mailloux: Phased Array Antenna Handbook, Second Edition - Artech, 2005