0.22THz Traveling-Wave Tube Based on a V-Shaped Rectangular Groove Staggered Double Grating Waveguide Slow-Wave Structure

A 0.22THz traveling-wave tube (TWT) based on a V-shaped rectangular groove staggered double grating waveguide (V-RG-SDGW) slow-wave structure (SWS) is proposed. This SWS has the advantages of higher interaction impedance and broadband bandwidth. The high frequency characteristics of the SWS have been studied by CST. The particle-in-cell (PIC) simulation results show that the output power reaches 45.6W at 225GHz under the condition of beam voltage of 21.75kV, beam current of 150mA and input power of 10mW, and corresponding gain and electron efficiency are 36.59dB and 1.4%, respectively.