This book serves as a handbook for radar active jamming system designers, in which design principles and methods are introduced in detail. The book starts from the basic concept and then discusses requirements analysis, type selection, key indicators description, and design methods of radar active jamming system and each subsystem step by step. The content is expressed in an intelligible way, and hence, it is easy to follow even for beginners in this area. Since the authors of this book are all experts and have designed plenty of real systems, their book certainly helps new engineers deal with different kinds of problems encountered while designing a radar active jamming system.