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.
作者
傅文杰
曾震宇
鲁钝
汤文博
鄢扬
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)
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)。
