Hybrid Bulk-Surface Modes Excited in the THz Cherenkov Oscillator with the Double Grating

Eduard Khutoryan,Sergey Vlasenko,Alexei Kuleshov,Sergiy Ponomarenko, Kostyantyn Lukin,Yoshinori Tatematsu,Masahiko Tani

2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)（2022）

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摘要

The operation of the THz Cherenkov vacuum electron devices with nonuniform double gratings supporting the hybrid bulk-surface modes has been considered for an increase of a thickness of a sheet electron beam and its coupling with RF field. It is shown that advantages of a double grating configuration may comprise the increase of up to 3 times of a coupling impedance as well as a widening of the operation frequency range in comparison with the single grating configuration.

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关键词

double grating,backward wave oscillator,THz radiation,hybrid bulk-surface mode,Cherenkov VED,nonuniform grating,sheet electron beam

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