Computer modelling of the electron-wave interaction in combined magnetron

The classical magnetron generators are the most-used among the crossed-field tubes. Having high efficiency, low operating voltages as well as low weight, volume and cost the magnetrons are competitive tubes in the aggregate of the given parameters. Upgrading of requirements to the output parameters of the classical magnetrons as well as complication of their operating modes allowed the researchers to design new types of the magnetrons: coaxial and inverted coaxial magnetrons. These tubes have a different constructional features, but the similar mechanism of an electron-wave interaction. The basis of such a mechanism is the interaction a re-entrant electron beam with an electromagnetic field of the resonant delay line (traditional classical crossed-field systems). On the other hand there are electron-wave systems which feature the interaction of two re-entrant electronic beams with the electromagnetic field of a resonant delay line (non-traditional systems). Among the tubes of this type are the combined magnetron. In this paper the theoretical and experimental investigation results of the physical processes in the combined magnetron are discussed.