The application of antenna arrays has been suggested in recent years for mobile communication systems to overcome the problem of limited channel bandwidth, thereby satisfying an ever growing demand for a large number of high bit rate mobiles on communication channels. It has been shown by many studies that when an array is appropriately used in a mobile communication system, it helps in improving the system performance by increasing channel capacity and spectrum efficiency. It also extends the range of coverage, reduces multipath fading, and co-channel interference. These benefits are achieved by adjusting the antenna radiation pattern for a given wireless environment. This book aims at developing novel analytical and simulation models for assessing the performance of a steered-beam adaptive antenna array with an arbitrary number of variably spaced dipole elements operating with incident narrow-band signals of various bandwidths and powers.