Simulation of high-efficiency relativistic backward wave oscillator in Q-band with low magnetic field
-
摘要: 为了实现高功率微波源的小型化，提出了一种Q波段低磁场工作的高效率相对论返波管，其结构主要由谐振腔反射器与两段周期性慢波结构组成，慢波结构采用同轴结构，基于同轴结构特性可以选取合适的内径，提高功率容量的同时降低了器件尺寸小带来的空间电荷效应。通过优化仿真，研究了不同的二极管电压、引导磁场对于微波输出功率的影响，同时通过调节阴阳极间距AK获得了最佳电子束阻抗。最终在引导磁场B=0.9 T、二极管电压为400 kV、束流3kA的条件下，获得了470 MW的微波输出功率，效率约为39.1%，微波的中心频率为45 GHz。Abstract: This paper proposes a compact Q-band relativistic backward wave oscillator (RBWO) operating at low magnetic fields, aiming to advance the miniaturization of high-power microwave (HPM) sources. The device consists of a resonant cavity reflector and two sections of periodic slow-wave structures (SWS), designed in a coaxial configuration. By exploiting the inherent characteristics of the coaxial structure, an optimal inner diameter was selected to enhance power handling capacity while mitigating space charge effects induced by the reduced device size. Through comprehensive simulation and optimization, the device achieved a microwave output power of 470 MW with an efficiency of 39.1% under operational conditions of a guiding magnetic field (B = 0.9 T), a diode voltage of 400 kV, and a beam current of 3 kA. The generated microwave signal exhibited a central frequency of 45 GHz.
-
图 5 Q 波段低磁场 RBWO 模拟模型
Figure 5. Q-band low magnetic field high efficiency RBWO simulation model
图 7 输出功率与效率随引导磁场强度的变化
Figure 7. Output power and efficiency change with guide magnetic field
图 8 调制电流分布与电子相空间图
Figure 8. Modulated current distribution and electron phase space plot
-
[1] 王荟达. C波段低磁场高效率相对论返波管研究[D]. 北京: 清华大学, 2021Wang Huida. Research on a C-band high-efficiency relativistic backward-wave oscillator with low-magnetic-field operation[D]. Beijing: Tsinghua University, 2021 [2] 肖仁珍. 相对论返波管研究进展[J]. 现代应用物理, 2022, 13:20101 doi: 10.12061/j.issn.2095-6223.2022.020101Xiao Renzhen. Research progress of relativistic backward wave oscillator[J]. Modern Applied Physics, 2022, 13: 20101 doi: 10.12061/j.issn.2095-6223.2022.020101 [3] 朱俊, 舒挺, 张军, 等. 低磁场过模慢波结构型高功率毫米波发生器的改进[J]. 强激光与粒子束, 2011, 23(11):3051-3054 doi: 10.3788/HPLPB20112311.3051Zhu Jun, Shu Ting, Zhang Jun, et al. Improvement of high power overmoded millimeter-wave generator operating at low magnetic field[J]. High Power Laser and Particle Beams, 2011, 23(11): 3051-3054 doi: 10.3788/HPLPB20112311.3051 [4] 周传明, 刘国治、刘永贵, 等. 高功率微波源[M]. 北京: 原子能出版社, 2007Zhou Chuanming, Liu Guozhi, Liu Yonggui, et al. High-power microwave sources[M]. Beijing: Atomic Energy Press, 2007 [5] Fan Zhiqiang, Sun Jun, Cao Yibing, et al. An oversized Ku-band Cerenkov oscillator with pure TM01 mode output[J]. Physics of Plasmas, 2022, 29: 063103. doi: 10.1063/5.0093129 [6] Ge Xingjun, Zhang Peng, Zhao Chenyu, et al. A high-efficiency L-band coaxial three-period relativistic Cherenkov oscillator[J]. Scientific Reports, 2019, 9: 12244. doi: 10.1038/s41598-019-47496-8 [7] Dang Fangchao, Zhang Xiaoping, Zhong Huihuang, et al. Simulation investigation of a Ku-band radial line oscillator operating at low guiding magnetic field[J]. Physics of Plasma, 2014, 21: 063307. doi: 10.1063/1.4886150 [8] 吴洋, 周自刚. S波段低磁场高效率相对论返波管振荡器研究[J]. 物理学报, 2019, 68:194101 doi: 10.7498/aps.68.20182155Wu Yang, Zhou Zigang. S-band high-efficiency relativistic backward waveoscillator with low magnetic field[J]. Acta Physica Sinica, 2019, 68: 194101 doi: 10.7498/aps.68.20182155 [9] Bai Zhen, Zhang Jun, Zhong Huihuang. A dual-mode operation overmoded coaxial millimeter-wave generator with high power capacity and pure transverse electric and magnetic mode output[J]. Physics of plasmas, 2016, 23: 043109. doi: 10.1063/1.4945645 [10] 邓秉方. 低磁场V波段相对论渡越时间振荡器研究[D]. 长沙: 国防科技大学, 2021Deng Bingfang. Investigation of a V-band relativistic transit-time oscillator with low guiding magnetic field[D]. Changsha: National University of Defense Technology, 2021 [11] Li Xiaoze, Song Wei, Tan Weibing, et al. Simulation of a low magnetic field relativistic backward wave oscillator with single mode structure[J]. Physics of Plasmas, 2016, 23: 023115. doi: 10.1063/1.4942423 [12] Wu Y. Investigation of Tritron as a high power microwave oscillator[J]. Physics of Plasmas, 2017, 24: 073105. doi: 10.1063/1.4990559 [13] Wu Yang. An S-band klystron-like relativistic backward wave oscillator operating at low magnetic field with high conversion efficiency[J]. Physics of Plasmas, 2023, 30: 033101. doi: 10.1063/5.0136622 [14] 左靖凡, 李士锋, 吴洋, 等. 带双腔反射器的X波段低磁场过模相对论返波管振荡器[J]. 强激光与粒子束, 2024, 36:033010 doi: 10.11884/HPLPB202436.230319Zuo Jingfan, Li Shifeng, Wu Yang, et al. Low magnetic field X-band over-mode relativistic backward wave oscillator with dual-cavity reflector[J]. High Power Laser and Particle Beams, 2024, 36: 033010 doi: 10.11884/HPLPB202436.230319 [15] 江佩洁, 李正红, 吴洋. 低磁场S波段相对论返波振荡器的工作特性[J]. 强激光与粒子束, 2019, 31:033001 doi: 10.11884/HPLPB201931.190010Jiang Peijie, Li Zhenghong, Wu Yang. Operating characteristics of an S-band relativistic backward wave oscillator with low magnetic field[J]. High Power Laser and Particle Beams, 2019, 31: 033001 doi: 10.11884/HPLPB201931.190010 -
下载:
点击查看大图
图(9)
计量
- 文章访问数: 24
- HTML全文浏览量: 8
- PDF下载量: 2
- 被引次数: 0
