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提出了一种基于矩形交错双光栅的两级串联慢波结构,该高频结构采用双电子注通道和一个聚焦系统,高频信号分别在两段慢波结构中工作在-1和+1空间谐波状态。对该慢波结构的色散特性进行了模拟计算,分析了该器件工作原理。通过设计传输变换结构及两级慢波连接波导组成高频互作用电路,在295~320 GHz频率范围内获得较好的传输特性,反射系数S11<-17 d B,传输系数S21>-12.51 d B。利用三维粒子模拟设计的方法,在单注电流18 m A时,获得14.6 W的299.5 GHz信号输出,电子效率为1.7%。
A two-stage series slow wave structure based on rectangular interleaved dual gratings is proposed. The high-frequency structure uses two electron injection channels and a focusing system. High-frequency signals work in -1 and +1 spaces Harmonic state. The dispersion characteristics of the slow-wave structure are simulated and the working principle of the device is analyzed. By designing transmission transformation structure and two-stage slow wave connecting waveguide, a high-frequency interaction circuit is formed to obtain better transmission characteristics in the frequency range of 295-320 GHz with a reflection coefficient S11 <-17 d B and a transmission coefficient S21> -12.51 d B. Using a three-dimensional particle simulation, a signal of 299.5 GHz at 14.6 W was obtained at a single injection current of 18 mA, with an electron efficiency of 1.7%.