Increasing information content is an important scientific problem in modern observation systems development. Radar@ or microwave@ imaging@ a technique which combines radar techniques with digital or optical information processing@ can be used for this purpose. Drawing on their own research@ the authors provide an overview of the field and explain why a unified approach based on wave field processing techniques@ including holographic and tomographic approaches@ is necessary in high resolution radar design. Such techniques use the complex field incident on an observation surface to produce a hologram@ which can be used to reconstruct an image of the object or to restore some of its physical parameters. This makes it possible to extract the size@ coordinates and radar cross-section of individual scattering centres. The book focuses on holography and tomography for quasimonochromatic and broadband signals@ and gives detailed coverage of the basic physical methods@ inverse problems and mathematical principles. It also contains discussion of new areas in imaging radar theory@ holographic radar@ the questions of estimation and improving radar image quality@ and finally various practical applications in the fields of space@ airborne radar@ air traffic control@ medical diagnostics and remote sensing. Author(s) A. Pasmurov@ J. Zinoviev