【摘要】 本文研究了一种W波段返波管,该返波管可以工作在高次谐波和低电压的状态下,采用梯形线作为该返波管的高频结构。运用仿真软件CST进行冷腔模拟,探讨和分析了梯形线的色散特性及耦合阻抗的影响;经过优化后,选取合适的结构参数,运用PIC粒子模拟软件进行热腔仿真,研究了该返波管的注波互作用过程,在高次谐波的状态下分析了工作电压变化对返波管输出效率及功率的影响。通过仿真的结果可以得到当工作频率为104.5～107.8GHz,工作电压在5.8～7.2kV之间时,返波管的输出功率在5～55mW之间,且注波互作用点在高次谐波2.2π～2.5π范围内。更多还原

【Abstract】 A W-band backward wave oscillator(BWO)is studied,which can work in higher harmonics statewithlow voltage.Aladder line is used as the high-frequency structure of the BWO.CST software is first adopted to analyze the cold-cavity of the structure,including the dispersion characteristics and coupling impedance related to thecavity,and appropriate structure parameters are selected.Then,the PIC particle simulation software is used to study the process of beam-wave interaction and to analyze the influence of the working voltage on the output efficiency and power under higher harmonicscondition.The simulation results show that the BWO can supply 5～55 mW output power in the frequency range of 101～105 GHz with a voltage of 5.8～7.2 kV,and the beam-wave interaction point is inhigher harmonicsrange of 2.2～2.5.更多还原