Abstract-Excitation of Hybrid Space-Surface Waves in Clinotrons with Non-uniform Grating

E. M. Khutoryan, Yu. S. Kovshov, A. S. Likhachev, S. S. Ponomarenko, S. A. Kishko, K. A. Lukin, V. V. Zavertanniy, T. V. Kudinova, S. A. Vlasenko, A. N. Kuleshov, T. Idehara,

https://link.springer.com/article/10.1007/s10762-017-0453-3

Excitation of surface (slow), space (fast), and hybrid surface-space waves in BWO-clinotron with periodically non-uniform grating has been studied both theoretically and experimentally. It is shown that an interaction of electron beam with hybrid surface-space wave may be more effective than with surface wave because of higher Q-factor, and than with space wave because of higher impedance. The experimental test results of both 100-GHz CW clinotron with non-uniform three-stage grating and of 130-GHz CW clinotron with four-stage grating showed the excitation of radiation with output power more than 1 W and some specific features of electronic frequency tuning.