To enable the output signal frequency of surface wave magnetrons to be controlled within a pulse length with no power consumption in the control circuit, we suggest that the lens optic facilities with no metal obstacles to the electron movement should be applied. It is shown that using the electrostatic lenses one can regulate the geometric and electric parameters of that electron cloud part which is responsible for the effective interaction between the particles and the high-frequency field of a slow-wave structure. By investigating the electron lens behavior in the crossed electric and magnetic fields, we determine and explore the ways of using such facilities for the non-power control of the surface wave magnetrons (SWM) output signal frequency without transit-time effects.
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