Research of edge-aligned staggered double-vane traveling-wave tube at G-band

In this paper, the complete designed scheme of the G-band edge-aligned staggered double vane traveling wave tube (EASDV-TWT) under the excitation of single pencil electron beam (PEB) has been proposed. Considering the current research status, this paper first carries out the theoretical research to analyze why the EASDV-TWT can strengthen the beam–wave interaction. Then, a unit cell of the novel structure has been designed and optimized; dispersion and transmission results initially demonstrate the performance potential of power amplification. At the same time, a large compression ratio single PEB electron optical system (EOS), which matches the requirement of the above unit cell, has been designed; a driven voltage of 22.2 kV and a beam current of 0.1 A have been set as design targets, and a stable transmission distance of 100 mm can be realized. Sensitivity analysis of the EOS has also been carried out, which fully shows the fabricating feasibility of the designed scheme. Finally, a beam–wave interaction system has been researched in detail. Results show that under the optimization of the efficiency improving methods of the TWT, a considerable power output can be realized. In the range of 220–240 GHz, the output power can be over 75 W, and the peak power can reach 100 W with the electron efficiency of 4.64%. Considering the complexity in the fabricating process, the designed scheme proposed in this paper is very likely to be realized in practical applications, which is expected to further develop the terahertz band radiation source and application industry in the future.