This is the first book to address in detail the topic of reconfigurable antennas, a rapidly growing specialty field with the promise of bringing more efficient technology to commercial and military products. It gathers the major reconfigurable antenna designs published in the past decade and categorizes them, organizing their design techniques and developing guidelines for future designs. The text also discusses the electronic components that can be incorporated on an antenna to reconfigure its structure, and provides different biasing techniques that can be used to achieve optimum performance. It will benefit professional engineers in communications, managers and system engineers in telecommunications, and telecom designers and managers of the military and NASA.