This book deals exclusively with active electronic countermeaures used against advanced radars in today's defense systems. The book discusses various methods used by defense radars to measure target position parameters, the vulnerabilities accompanying these methods, and the jamming techniques used to exploit these weaknesses. Supplemented with 61 equations, 7 tables, and over 100 illustrations, this book focuses on elements of radar systems that are vulnerable to ECM, which include the jamming-to-signal ratio and the effective radiated power (ERP). The book exposes the conflict between radar and active ECM designers concerning the fate of a vehicle penetrating radar-defended territories, uses generic systems to illustrate the range and angle measurement functions of typical search and tracking radars - providing comprehensive EW material you can apply to specific system threats.