Abstract: Low-cost，higher frequency and scalability are the main impetuses to the development of phased array antennas integration technology. In this paper, the progresses in architecture of phased array antennas (brick-type and tile-type building blocks) and RF circuit integration technology (chips with multi-function and RF-wafer scale integration) are reviewed. Finally,it is pointed out that development of chips performing multi-function is an important way to develop millimeter-wave phased array antennas.