Development of G-Band Continuous-Wave Folded Waveguide Traveling-Wave Tube

A detailed development of a G-band continuous-wave (CW) traveling-wave tube (TWT) with a 160-GHzmiddotW product of bandwidth power is reported in the present work, in which the electron optics system (EOS), the tapered phase velocity folded waveguide (TPVFW) slow wave structure (SWS), the modified pill-box window (MPBW), and experimental results are described. The prototype of the proposed TWT is fabricated with optimized structural parameters obtained by particle-in-cell (PIC) simulations. Moreover, the experimental results show that TWT with 27-W output power at the frequency of 220 GHz at 100% duty cycle is obtained at the operation voltage of 17.1 kV and the current of 62 mA. The proposed G-band TWT will have broad applications in far-distance high-resolution imaging and large communications capacity.

Automated summary

This paper presents a detailed development of a G-band continuous-wave (CW) traveling-wave tube (TWT) with a 160-GHz·W product of bandwidth power. The key components, including the electron optics system, the tapered phase velocity folded waveguide slow wave structure, the modified pill-box window, and experimental results, are described. The prototype of the proposed TWT is fabricated with optimized structural parameters obtained by particle-in-cell simulations. The experimental results demonstrate that the TWT achieves 27-W output power at the frequency of 220 GHz with a 100% duty cycle at an operation voltage of 17.1 kV and a current of 62 mA. The proposed G-band TWT has significant potential in far-distance high-resolution imaging and large communications capacity.