This book describes the physical basis of microwave electronics and related topics, such as microwave vacuum and microwave semiconductor devices.

It comprehensively discusses the main types of microwave vacuum and microwave semiconductor devices, their principles of action, theory, parameters and characteristics, as well as ways of increasing the frequency limit of various devices up to the terahertz frequency band. Further, it applies a unified approach to describe charged particle interaction within electromagnetic fields and the motion laws of charged particles in various media.

 The book is intended as a manual for researchers and engineers, as well as advanced undergraduate and graduate students.

Andrey D. Grigoriev graduated from Leningrad Electrotechnical Institute (LETI) in 1960 as electronics engineer. He received the PhD degree in Microwave electronics in 1967 and the Doctor of technical science degree in 1985. A.D. Grigoriev is working in LETI as assistant professor and professor, delivering lectures on electrodynamics, microwave technique and microwave electronics. He works also at Svetlana JSC as a consultant. Professor Grigoriev is the author of more than 150 publications, including 4 monographies: Microwave cavities and slow-wave structures (1984), Electrodynamics and microwave technique, Methods of computational electrodynamics (2012) and Microwave electronics (2016). He is a member of the editorial board of several Russian and international magazines.

Vyacheslav A. Ivanov graduated from  St Petersburg Electrotechnical University ("LETI") in 1970. He became Associate Professor in 1980. his scientific interest is  in the field of computer modeling of microwave tubes, In 1981-1982  he had a scientific research stay in Sweden.  His activities concern microwave transistors and development of industrial microwave plants. Since 1970 he lectures on Microwave Electronics. He wrote 15 textbooks and has 23 patents of the Russian Federation.

Sergey I. Molokovsky graduated from LETI in 1953. He received the PhD and Doctor degrees in the field of microwave electronics. He is professor of Radio electronics department of the LETI. He is author of the book Intense electron and ion beams. Professor Molokovsky was UNESCO expert. He authored about 150 scientific papers and  5 scientific monographs.

Preface.- Part 1. Physical bases of microwave electronics.- History of microwave electronics.- Basic laws of microwave electronics.- Oscillations and waves in charged particles beams.- Charged particle interaction with alternating electromagnetic field.- Microwave device as an element of a microwave circuit.- Part 2. Vacuum electron devices.- Power grid tubes.- O-type microwave devices.- M-type microwave devices.- Gyro-resonance devices.- Relativistic devices.- Part 3. Solid-state microwave devices.- Main functional elements of solid state devices.- Diodes with positive dynamic impedance.- Diodes with negative dynamic impedance.- Microwave transistors.