Formation of Multi-Wave Coherent Radiation by Relativistic Electronic Flows in Oversize Electrodynamic Structures

The paper presents an overview of the achievements in the field of relativistic high-current electronics. Specific features of the functioning of devices using high-current relativistic fluxes of charged particles are indicated. Various mechanisms for the generation of microwave radiation are discussed and, based on the synchronism condition, their generality is shown. On the example of a multiwave Cherenkov generator, the features of the operation of high-current relativistic electronics are analyzed.