W波段二次谐波回旋行波管放大器  

W-band second-harmonic gyrotron TWT amplifier

作　　者：李志良[1] 冯进军[1] 刘本田[1] 王峨锋[1] 曾旭[1] 张杨[1] 

机构地区：[1]中国电子科技集团公司第12研究所大功率微波电真空器件技术国防科技重点实验室,北京100015

出　　处：《太赫兹科学与电子信息学报》2015年第3期365-368,共4页Journal of Terahertz Science and Electronic Information Technology

基　　金：科技部项目--国家磁约束核聚变能发展研究专项(2013GB110003)

摘　　要：采用谐波工作的回旋管互作用磁场比基波磁场降低了1/s,可降低整管磁场设计难度,具有较大的应用前景。通过对W波段二次谐波回旋行波管高频介质加载结构、模式竞争和注波互作用研究,确定了该放大器的工作参数。非线性模拟表明,当应用100 k V,20 A,α=1.2的电子注时,该回旋管可在91 GHz频率处产生465 k W的输出功率和49 d B的增益结果。并且,基于耦合波理论,讨论了一个轴对称半径微扰的TE02~TE01输出模式变换器,效率在95%以上时,其带宽达到4 GHz。Harmonic operation is of special significance due to its low magnetic field operation, and the magnetic field of the sth harmonics gyrotron at a given frequency is reduced by a factor of s for operation. By using an interaction circuit with dielectric loaded, the operating parameters of the W band TE02 mode second harmonic gyrotron Traveling-Wave Tube(gyro-TWT) amplifier are determined by analysis of dielectric loaded, mode competition and interaction between electron beam and wave. Nonlinear analysis shows that the amplifier can generate a saturated peak power of 465 k W with a gain of 49 d B at 91 GHz when utilizing a 100 k V, 20 A, α=1.2 electron beam. Based on coupled mode theory, a TE02-TE01 mode converter within a tapered waveguide radius is discussed and a bandwidth about 4 GHz is obtained when the conversion efficiency exceeds 95%.

关 键 词：回旋行波管放大器 W波段 二次谐波 模式变换器 

分 类 号：TN124[电子电信—物理电子学]