This book offers engineers and researchers in the fields of antenna, microwave, and electromagnetic, with an up-to-date guide to reflectarray antenna design and analysis techniques. Furthermore, the book will provide readers with an overview of reflectarray antenna research history, including various implementations and state-of-the-art, enabling the reader to develop their knowledge of the basic theories for design and analysis of reflectarray antennas. In addition a wealth of design examples along with numerical and experimental results are presented, which serves as a reference for researchers to verify their own developed programs. The book also includes detailed design procedures for a wide range of diversified applications, such as broadband designs, multi-band operation, multi-beam performance, contour-beams, beam-scanning systems, and conformal reflectarray antennas, along with illustrative examples for each design.