Sub-THz CW clinotrons with multi-stage gratings

The development of sub-THz CW clinotrons with improved operational parameters is discussed in this paper. The application of multistage gratings is proposed as a way of the high-frequency losses reduction at the sub-THz range and enhancement of the beam-particle interaction efficiency. Three-, four- and five- stage gratings are considered and compared to uniform one. The dispersion analysis of the proposed slow-wave structures is carried out. Numerical simulation of self modes of the cavity resonator with multistage grating was performed.