Study on the ridge loaded azimuthal supported angular log-periodic strip meander line slow wave structure

The ridge loaded azimuthal supported angular log-periodic strip meander line slow wave structure (SWS) is presented in this paper. The dispersion characteristics and coupling impedance of the SWS are calculated. According to the simulation results of beam wave interaction, the planar travelling wave tube(TWT) with SWS can give the output power of 136.3W, the electron efficiency and gain approach 5.6% and 9.6dB, respectively, at 39GHz under a single fan-shaped radial sheet beam voltage of5250Vand current of 0.46A.