Novel Extra-wide Tunnel Rectangular Folded Waveguide Traveling Wave Tube

In this paper, a novel Extra-Wide beam Tunnel rectangular Folded Waveguide (EWT-RFWG) traveling wave tube (TWT) is proposed. The structure not only has a larger electron beam tunnel to accommodate a higher current beam, but also achieves a wider operating bandwidth. The TWT adopting EWT-RFWG SWS can produce more than 5 W of output power in the frequency range of 245 GHz to 254 GHz. This novel SWS is also convenient for parallel connection to further improve the device output power. Integrating two slow wave structure arrays allows the total output power to be enhanced to 14.70 W from 8.19 W at 245 GHz. Meanwhile, the output power of the parallel high-frequency circuit exceeds 10 W in the frequency range of 243 GHz to 251 GHz.