G波段二次谐波准光回旋行波管研究  

Study on a G-band Second-harmonic Quasi-opticalGyrotron Traveling Wave Tube

作　　者：傅文杰[1] 曾震宇 鲁钝 汤文博 鄢扬[1] FU Wen-jie;ZENG Zhen-yu;LU Dun;TANG Wen-bo;YAN Yang(Sichuan Key Laboratory of Terahertz Science and Technology,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太赫兹科学技术四川省重点实验室,四川成都611731

出　　处：《真空电子技术》2024年第4期11-14,25,共5页Vacuum Electronics

基　　金：国家自然科学基金(62371105,61971097,62111530054);四川省科技计划(2023YFH0028);广西无线宽带通信与信号处理重点实验室开放基金项目(GXKL06230201)。

摘　　要：为开展适用于太赫兹频段的大功率回旋放大器研究。对基于准光共焦波导的二次谐波准光回旋行波管进行了研究,理论与仿真结果表明,准光波导具有良好的模型选择性,利用器件的二次谐波工作,其基波与二次谐波的返波振荡可以得到很好的抑制。在理论与仿真研究基础上,设计了一只G波段的二次谐波准光回旋行波管,理论计算结果表明:在65 kV电子束电压、10 A电流、速度横纵比为1、磁场强度为4.19 T时,最大输出功率为90 kW,效率为13.8%,增益为34.8 dB。当输入功率10 W时,-3 dB带宽为2 GHz。To research the high-power gyrotron traveling wave tube(gyro-TWT)suitable for terahertz frequency band,a second-harmonic quasi-optical gyro-TWT based on a quasi-optical confocal waveguide is investigated.The theoretical and simulation results indicate that the quasi-optical waveguide exhibits excellent mode selectivity.By utilizing the second-harmonic operation of the device,the backward wave oscillation of the fundamental wave and the second harmonic can be effectively suppressed.Based on the theoretical and simulation research,a G-band second-harmonic quasi-optical gyro-TWT is designed.The theoretical calculations indicate that,under an electron beam voltage of 65 kV,a current of 10 A,a velocity aspect ratio of 1,and a magnetic field strength of 4.19 T,the maximum output power can reach 90 kW with an efficiency of 13.8%and a saturation gain of 43 dB.When the input power is 10 W,the-3 dB bandwidth is 2 GHz.

关 键 词：回旋行波管 准光 二次谐波 G波段 

分 类 号：TN12[电子电信—物理电子学]