摘要
提出了一种圆极化TE_(11)输出模式旋向可在线切换的相对论磁控管。该器件互作用区结构采用同腔型磁控管结构,输出结构采用全腔提取结构,励磁系统采用Helmholtz线圈磁场系统。本文利用全腔提取结构的模式激励理论对该器件的输出模式成分进行了理论分析,利用粒子模拟软件对该器件的工作性能进行了模拟研究。粒子模拟结果表明:在外加电压770 kV和外加轴向磁场0.2 T(方向与微波轴向输出方向同向)的条件下,该器件的工作模式为5π/6模,工作频率为2.35 GHz,输出功率为3.86 GW,功率效率达到55.5%,输出模式为右旋圆极化TE_(11)模式且模式纯度达到99%以上;当外加轴向磁场与微波轴向输出方向反向时,该器件的输出模式即可在线切换为左旋圆极化TE11模式,而其他输出性能基本保持不变。
A relativistic magnetron with online switchable rotation direction of a circularly polarized TE_(11) output mode is proposed.In the device,the same cavity magnetron is adopted as the beam-wave interaction structure,the all-cavity extraction structure is adopted as the output structure,and the Helmholtz coils system is adopted as the magnetic system.In this paper,the output mode components of the device are theoretically analyzed by the mode excitation theory of all-cavity extraction structure,and the performance of the device is investigated by Particle in Cell simulation.Simulation results show that when the applied voltage is 770 kV and the applied magnetic field that has the same direction with the output microwave is 0.2 T,the device that operates at 5π/6 mode can output a right circularly polarized TE_(11) mode with the mode purity of more than 99%,the operating frequency of 2.35 GHz and the output power of 3.86 GW,corresponding to the power conversion efficiencyof 55.5%.When the direction of the applied magnetic field is reversed,the rotation direction of the right circularly polarized TE_(11) mode can be online switched to the left in the condition of keeping other performance of the device.
作者
史迪夫
钱宝良
Shi Difu;Qian Baoliang(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2021年第7期47-52,共6页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(61901484)。
关键词
高功率微波
相对论磁控管
全腔提取
圆极化TE_(11)模式
输出模式旋向在线切换
high power microwave
relativistic magnetron
all-cavity extraction
circularly polarized TE_(11)mode
online switchable rotation direction of output mode
