Design of E-Band Low-Voltage and High-Efficiency Folded-Waveguide Traveling-Wave Tube

This paper designs a low-voltage and high-efficiency folded-waveguide traveling-wave tube at E-band. Besides optimizing the size and the number of the periods, efficiency increasing methods have also been added into the FW-TWT. Simulation results illustrate that both output power and efficiency can be further increased. In the range of 81-86GHz, output power is over 110 W and the electron efficiency can exceed 9.5%.