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Study of double-beam folded waveguide back wave oscillator in terahertz band

In this paper, the development of Terahertz multi-beam Back Wave Oscillator (BWO) is investigated. We use folded waveguide slow-wave structure combined with two planar alignment electron beams to enhance the output power of BWO. The stable output power of planar alignment double- beam folded waveguide BWO is 7.03W by particle in cell (PIC) simulations. It is notable that the output power of double-beam BWO folded waveguide is two times higher than single-beam folded waveguide BWO with the same parameters.