螺距跳变技术优化行波管电子效率的研究

摘要

行波管采用动态速度渐变(DVT)技术能获得很高的电子互作用效率.这里采用粒子模拟(PIC)技术对Ka波段某螺旋线空间行波管慢波结构进行模拟,分析了采用DVT技术的慢波结构内部各段螺距的大小和长度对行波管电子效率以及增益的影响.对慢波结构进行优化,优化后,电子效率由17.53％提高至27.27％,增益由51.17 dB增加至53.09dB.%High electronic interaction efficiency can be obtained with DVT (dynamic velocity taper) technology for traveling-wave tubes (TWTs). The particle-in-cell (PIC) simulation technology is used to simulate a slow-wave structure of Ka-band helix space TWTs. The effect of the length and pitch of slow-wave structure designed with DVT technology on the electronic effeciency and gain of TWTs is analyzed. The optimization of slow-wave structure makes the electronic efficiency increased from 17. 53% to 27. 27% , and the gain increased from 51. 17 dB to 53. 09 dB.