Optimizing the spatial-harmonic millimeter-wave magnetron.

A particle simulation has been carried out for an 8 mm nonrelativistic magnetron operating at the first backward spatial harmonic of a cavity eigenmode in order to study the effect of geometrical parameters of the slow-wave anode structure with sector-shaped vanes and resonators on the output characteristics. It is shown that an optimum value of the resonator opening, which corresponds to maximum output power, can be predicted from the electromagnetic characteristics of the cavity, at least if the dc voltage is close to its threshold value. The corresponding procedure is proposed. The optimum does not exist if the loaded Q factor is too large. [ABSTRACT FROM AUTHOR]