摘要
对平面梯形结构多间隙谐振腔的模式分布、特性阻抗、耦合系数以及工作稳定性进行了研究.在此基础上给出了W波段高峰值功率扩展互作用速调管高频互作用系统设计,并采用三维粒子模拟(PIC)技术对电子的速度调制、群聚及其与高频场的相互作用和能量转换等物理过程进行了研究,定量给出了放大器的功率、带宽、效率以及增益等关键技术指标.PIC结果显示:在中心频率94.52 GHz以及电压16 k V、电流0.6 A的电子注参数下,最大输出功率达到1.8 k W,相应的增益和电子效率分别为47.7 d B和19.4%;扫频结果显示瞬时3 d B带宽为210 MHz.
The characteristics of the planar ladder-type multi-gap resonant cavity are investigated,including the mode distribution,characteristic impedance( R / Q),coupling coefficient and the operating stability. The high-frequency interaction system for a W-band high-power extended interaction klystron was designed. The nonlinear performances such as the saturated power,gain,efficiency,as well as bandwidth are predicted by using the three-dimension Particle-in-Cell technology. The modulation and bunching of the beam and the physics of the interaction between the beam and the multigap resonant cavity were explored. PIC simulation results showthat the output power is up to 1. 8 k W at the frequency of94. 52 GHz with the voltage of 16 k V and beam current of 0. 6 A. This power corresponds to a gain of 47. 7 d B and an efficiency of 19. 4% respectively. The sweep-frequency simulations with the same drive power showthat the 3-d B bandwidth of 210 M Hz can be achieved.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第3期307-313,共7页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(61222110
60971073)~~
关键词
扩展互作用速调管
多间隙谐振腔
平面梯形电路
电子注电导
三维粒子模拟
extended interaction klystron,multi-gap resonant cavity,planar ladder-type circuit,beam conductance,three-dimension particle-in-