Passive radar systems encompass a class of radar systems that detect and track objects by processing reflections from non-cooperative sources of illumination in the environment, such as commercial broadcast and communications signals. In the early 1950s, some interesting properties of the scattered radar energy in bistatic radar systems were considered, which contributed the development of passive radar technology. Since 1980s, the passive radar systems aroused more and more research attentions from academia and industry. Several advantages can be obtained by passive radar, such as lower cost of procurement, operation and maintenance, physically small and flexible deployment, high capabilities against stealth aircraft, jamming and anti-radiation. This is a comprehensive book on passive radar and bistatic technology, introducing the basic principles and the key technologies of performance prediction, detection and tracking of passive radar, and the future developments and applications and the latest technical progress in recent years. In particular, the core technology of bistatic radars discussed and compared, which provides a good overview and coverage of adaptive and block processing schemes, and interference suppression approaches for passive radar system. In addition, this book also introduces the application of bistatic passive radar system paradigm, including kinds of illuminators and various processing cases, which will provide an important technical support and reference for the design and processing of the novel passive radar system. The book will most help the readers to obtain a solid foundation in the fundamental properties and a comprehensive understanding of the basic principles of passive radar system, high capabilities to solve the practical problems in passive radar application. This monograph can be a powerful reference for relative researchers from academia and industry to develop practical applications or exploit the academic essence of passive radar system.