ABSTRACT
This chapter describes the phased-array antenna systems for mobile, stratospheric, and satellite communication systems. A lot of architectures for phased-array antennas have been investigated for use of radar and communication systems because of the attractiveness of beam steering without mechanical elements. The use of array antennas has played an important role in mobile wireless communications as the popularity of personal communication services such as cellular phone has increased and the demand for personal and multimedia services has also increased. The configuration of the array is an important factor determining the characteristics of the beam pattern, and popular configurations are linear, planar, circular, etc. The computer simulations showed that the adaptive beam control for the multiple users in a macrocell system could reduce the blocking rate and the transmission power. The growing demands for wireless high-rate transmission services have been increased.
