W波段回旋行波管仿真设计与热测实验

Simulation and hot test of a W-band gyro-TWT

通过软件仿真方法分析和设计了W波段回旋行波管的输入输出耦合器、磁控注入式电子枪以及高频互作用电路,根据优化结果加工了实物并进行了热测实验.实验结果表明,电子注电压60 k V,电流6 A,在94 GHz频率获得了最大峰值功率78 k W,增益53.9 d B以及21.7%的效率,峰值功率大于50 k W带宽达到3.8 GHz.PIC粒子模拟和热测实验均表明,设计的W波段回旋行波管能够稳定的工作,从而证明周期加载高频互作用电路在抑制寄生模式以及自激振荡方面具有很大的优势.

This paper has designed the input and output coupler,M agnetron Injection Gun（ M IG） and beam-w ave interaction circuit for a W-band gyrotron traveling tube（ gyro-TWT） w ith softw are simulation. The tube w as manufactured according to the optimized results. The gyro-TWT is driven by a voltage of 60 k V and current of 6 A. Hot test predicts its maximum peak output pow er of 78 k W,21. 7% efficiency at 94 GHz w ith a gain of 53. 9 d B. The bandw idth with peak pow er greater than 50 k W is about 3. 8 GHz. Both the PIC simulation and hot test indicated that the gyro-TWT can w ork stablely. The periodic lossy dielectric loaded circuit is excellent for suppressing potential spurious oscillations and absolute oscillation.