Using Active Integrated Antenna (AIA) instead of the conventional sub-system designs of individual components will provide a system designer with more features and enhance performance. This book explains how active integration and co-design between the active components (amplifier, oscillator, mixer, diodes) and the antenna can provide better power transfer, higher gains, increased efficiencies, switched beam patterns and smaller design footprints. As new antenna designs will require closer integration with other radio electronics, AIA are expected to be used in future wireless terminals. The book introduces the fundamental aspects of AIA and discusses in detail the various types of AIA, such as oscillator, amplifier, mixer, transceiver, frequency reconfigurable, on-chip and on package, as well as non-foster AIA covering various frequency bands and wireless standards. It presents co-design procedures for AIA applied to multiple-input-multiple-output (MIMO) front ends as well as examples of narrowband and wideband designs. This is the first book to elaborate on AIA design with detailed step-by-step tutorials and the use of software packages (provided in an accompanying CD). It contains real world cases and illustrations, and is a must-have title for practicing and research engineers.