S-shaped microstrip meander-line slow-wave structure for W-band traveling-wave tube

S-type microstrip meander-line slow wave structure was designed and simulated. The effects of different structural parameters on the new structure were analyzed. The simulation results show that this microstrip meander-line slow wave structure has a similar dispersion characteristic with the traditional structure, and the center frequency expands to the higher frequency. The transmission loss and coupling impedance is greatly improved in high frequency range.