Development of transverse-wave type microwave tubes

New types of high-quality vacuum microwave devices were successfully developed in Russia last year. Their operating principle is based on transverse grouping of homogeneous (non-bunched) electron beam in circularly polarised electromagnetic fields of slow-wave structures and resonant cavities. The use of transverse (cyclotron and synchronous) waves of electron beams gives the possibility to realise efficient energy exchange mechanisms with HF fields, to achieve perfect wave selection and to minimise nonlinear influence of space charge fields on output characteristics. These advantages help to realize various high-quality operating characteristics of transverse-wave microwave vacuum devices.