Scanning arrays present the radar or communications engineer with the ultimate in antenna flexibility. They also present a multitude of new opportunities and new challenges that need to be addressed. In order to describe the needs for scanned array development, this book begins with a brief discussion of the history that led to present array antennas. This text is a compact but comprehensive treatment of the scanned array, from the underlying basis for array pattern behavior to the engineering choices leading to successful design. The book describes the scanned array in terms of radiation from apertures and wire antennas and introduces the effects resulting directly from scanning, including beam broadening, impedance mismatch and gain reduction and pattern squint and those effects of array periodicity including grating and quantization lobes and array blindness. The text also presents the engineering tools for improving pattern control and array efficiency including lattice selection, subarrray technology and pattern synthesis. Equations and figurers quantify the phenomena being described and provide the reader with the tools to tradeoff various performance features. The discussions proceed beyond the introductory material and to the state of the art in modern array design. Contents: Basic Principles and Applications of Array Antennas / Element Coupling Effects in Array Antennas / Array Pattern Synthesis / Subarray Techniques for Limited Field of View and Wide Band Applications

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Robert J. Mailloux received the BS degree in electrical engineering from Northeastern University, Boston, MA in 1961 and the SM and Ph.D degrees at Harvard University, Cambridge MA in 1962 and 1965 respectively. Currently he is a Research Professor at the University of Massachusetts, Amherst MA, and a member of the staff of Photonic Systems Inc.. He is a retired Senior Scientist at the Sensors Directorate, Air Force Research Laboratory, Hanscom Air Force Base, MA, and now working with University of Massachusetts on a research contract with the Air Force Research Laboratory. He has served as the Chief of the Antennas and Components Division, Rome Laboratory and as a physicist at the Air Force Cambridge Research Laboratory. He is the author or co-author of numerous journal articles, book chapters, 13 patents and the book Phased Array Handbook (Norwood MA; Artech House 1994) and co-editor of the book History of Wireless, with colleagues T. Sarkar, A. Oliner, M. Salazar-Palma and D. Gupta. His research interests are in the area of periodic structures and antenna arrays. He is a Life Fellow of the IEEE. Dr. Mailloux was President of the Antennas and Propagation Society in 1983, and in 1992 he received the IEEE Harry Diamond Memorial Award. He received two IEEE AP-S Honorable Mention Best Paper Awards and recently received the IEEE Third Millennium Medal and received the AP-S Distinguished Technical Achievement Award in 2005. He is a member of Tau Beta Pi, Eta Kappa Nu, Sigma Xi, and Commission B of the International Scientific Radio Union. He has received four Air Force Research Laboratory "Best Paper" awards, the "Engineer of the Year" award, and is an AFRL Fellow. He has been a distinguished Lecturer for the Antenna and Propagation Society and is currently chairman of the AP-S/IEEE Press Liaison Committee.