用动力学理论分析了三次谐波复合腔回旋管中的注 波互作用 ,选取了工作点 ;建立了突变复合腔回旋管的自洽非线性理论模型 ,该模型既考虑了电子和高频场的自洽相互作用又考虑了复合腔过渡部分模式的耦合 ,基于该理论模型 ,对一只三次谐波 35GHz突变结构复合腔回旋管中电子注与H61 H62 高频场互作用进行了数值模拟 ,当电流 2 0A ,磁场为 0 44 2T时 ,互作用效率为 2 4% ,输出功率为 2 10kW . The dynamical theory was used to analyze the wave injection interaction in the third harmonic gyrator tube, and the working point was selected. A self-consistent nonlinear model of the gyration tube was established. The model considers both the electronic and high frequency fields Based on this theoretical model, the numerical simulation of the interaction between the electron injection and the H61 H62 high-frequency field in a gyroscope of a 35 GHz triplet structure was carried out. When the current is 20 A and the magnetic field is 0 44 2 T, the interaction efficiency is 24% and the output power is 210kW.