Radio Frequency Identification Engineering Radio frequency identification (RFID) has become an undeniable aspect of modern living, being used from logistics, access control, and electronic payment systems to artificial intelligence, and as a key building block of the internet of things. Presenting a unique coverage of RFID reader design and engineering, this is a valuable resource for engineers and researchers, aiding in their mission of fulfilling current and future demands in the RFID space. Providing a cohesive compilation of technical resources for full-stack engineering of RFID readers, the book includes step-by-step techniques, algorithms, and source code that can be incorporated in custom designs. Readers are invited to explore the design of RFID interrogators based on software-defined radio for flexible, upgradeable solutions as well as low-complexity techniques for engineering low-cost RFID readers. Additionally, the authors provide insight into related topics such as waveform design optimization for improved reading range and novel quadrature backscatter modulation techniques.