220 GHz周期介质加载波导回旋行波管的理论设计与PIC仿真  

Theoretical study and PIC simulation of a 220 GHz Gyro-TWT with periodic dielectric loaded waveguide

作　　者：陈儒泰 喻胜[1] CHEN Ru-Tai;YU Sheng(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都611731

出　　处：《红外与毫米波学报》2022年第6期1042-1050,共9页Journal of Infrared and Millimeter Waves

摘　　要：通过理论研究和粒子仿真(Particle in Cell,PIC),设计了一支工作在基波TE01模式下,采用周期性介质加载(PDL)波导的220 GHz回旋行波管(gyrotron traveling wave tube,Gyro-TWT)。通过研究寄生振荡的起振阈值和加载介质环,成功抑制了寄生振荡(绝对不稳定性振荡和返波振荡)。分别采用了非线性理论程序与粒子仿真对注波互作用进行研究,对比了两种结果基本一致。PIC仿真结果显示,优化后的回旋行波管,工作在220 GHz时,在输入70 kV和3 A电子注的情况下,饱和输出功率为55.61 kW,对应的效率为26.48%,饱和增益为53.56 dB,-3 dB带宽为12 GHz。In this article,a 220 GHz gyro-TWT operating at fundamental harmonic TE01 mode with periodic dielectric loaded(PDL)waveguide was designed through theoretical study and particle in cell(PIC)simulation.The parasitic oscillations(absolute instability oscillation and backward wave oscillation)have been successfully suppressed by study of start-up thresholds and loading dielectric rings.The beam wave interaction behaviors are compared between nonlinear theory programs and PIC simulation,the results are basically consistent.In PIC simulation,the optimized gyro-TWT was developed with saturated output power of 55.61 kW,corresponding efficiency of 26.48%at 220 GHz with 70 kV and 3A electron beam,the saturated gain is 53.56 dB,and-3dB bandwidth is 12 GHz.

关 键 词：回旋行波管 寄生振荡 周期介质加载 非线性理论 粒子模拟 220 GHz 

分 类 号：O43[机械工程—光学工程]