Study on phase velocity tapered microstrip angular log-periodic meander line travelling wave tube

摘要

To improve the efficiency of beam-wave interaction and the gain of the microstrip angular log-periodic meander-line (MALPML) travelling wave tube (TWT), a modified phase velocity tapered MALPML (PVT-MALPML) with 45° chamfer is proposed in this study. Compared with MALPML slow wave structure (SWS), the PVT-MALPML SWS has better transmission characteristics. Meanwhile, the beam-wave interaction simulation results show that a higher gain and electron efficiency can be produced by the PVT-MALPML TWT. By using the novel PVT-MALPML SWS, the properties of the radial TWT is further improved to meet the requirements of electronic system to TWTs.