Study on amplitude consistency control methods for a 2.45 GHz magnetron array phase-locked system

Li Wenlong; Li Hailong; Qin Yu; Hou Wanshan; Wang Licun; Liu Haixia; Bi Liangjie; Wang Bin; Yin Yong; Meng Lin

doi:10.11884/HPLPB202638.250312

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Li Wenlong, Li Hailong, Qin Yu, et al. Study on amplitude consistency control methods for a 2.45 GHz magnetron array phase-locked system[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250312

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Li Wenlong, Li Hailong, Qin Yu, et al. Study on amplitude consistency control methods for a 2.45 GHz magnetron array phase-locked system[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250312

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Study on amplitude consistency control methods for a 2.45 GHz magnetron array phase-locked system

doi: 10.11884/HPLPB202638.250312

School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received Date: 2025-09-24
Accepted Date: 2026-02-11
Rev Recd Date: 2026-02-20

Available Online: 2026-03-11

Abstract

Abstract

Background
Owing to their simple configuration, stable operating behavior, and high electronic efficiency, magnetrons have been extensively employed in high-power microwave applications. Nevertheless, the output capability of a single microwave source is inherently constrained, making it difficult to satisfy the increasing demands of high-power applications. Magnetron array configurations offer an effective approach for enhancing the peak power of microwave systems.
Purpose
To address the demand for frequency controllability and output consistency in large-scale magnetron arrays, this work integrates the advantages of injection locking and mutual coupling locking and proposes an injection-locking-based amplitude consistency control scheme for coupled magnetron arrays.
Methods
Five magnetrons are interconnected through directional couplers and coaxial lines to form a cascaded mutually coupled structure, in which an external signal is injected solely into the central magnetron to pull and control the operating frequency of the entire array via coupling paths. High-power experimental measurements were performed to systematically collect and analyze the output signals under five operating conditions, including free-running operation, mutual coupling only, and external injection at frequencies of 2.466 GHz, 2.465 GHz, and 2.464 GHz.
Results
The experimental results indicate that introducing an external injection signal under the mutually phase-locked condition modifies the overall frequency characteristics of the cascaded magnetron array, thereby affecting the amplitude distribution of the array output signals. Moreover, effective regulation of the output amplitude of the magnetron array can be realized by tuning the frequency and power of the injected signal. The dispersion of output amplitudes under different conditions is quantitatively characterized using the sample variance of the power spectral density peak of the output signal, and the results show that, at an injection power of 100 W, the variance decreases from 1.868 to 0.446, indicating a significant improvement in amplitude consistency.
Conclusions
This approach offers strong scalability and practical applicability and is well suited for coherent power combining and phase-scanning applications in large-scale magnetron array systems.
- injection locking,
- S-band mutual coupling magnetron array,
- amplitude consistency,
- frequency characteristics,
- high-power microwave

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References(25)

References

[1]	Benford J, Swegle J A, Schamiloglu E. High power microwaves[M]. 2nd ed. Boca Raton: CRC Press, 2007: 43-108.
[2]	Qin Yu, Yin Yong, Song Minsheng, et al. Particle-in-cell simulations of relativistic magnetron with axial symmetrical split output[J]. IEEE Transactions on Plasma Science, 2023, 51(7): 1880-1884. doi: 10.1109/TPS.2023.3276922
[3]	Bi Liangjie, Jiang Xinyu, Li Hailong, et al. Design of the integrated interaction circuits for a 200-kW Ka-band klystron with two output ports[J]. Journal of Infrared and Millimeter Waves, 2023, 42(6): 772-779.
[4]	电子管设计手册编辑委员会. 磁控管设计手册[M]. 北京: 国防工业出版社, 1979 Electronic Tube Design Handbook Editorial Committee. Magnetron design handbook[M]. Beijing: National Defense Industry Press, 1979
[5]	Benford J. History and future of high power microwaves[J]. IEEE Transactions on Plasma Science, 2024, 52(4): 1137-1144. doi: 10.1109/TPS.2024.3391732
[6]	Shibuya S, Adachi K, Morikawa H, et al. Microwave power transmission using a signal-to-leakage-and-noise ratio to protect wireless communication devices[J]. IEICE Communications Express, 2024, 13(2): 39-42. doi: 10.23919/comex.2023XBL0138
[7]	Wang Lihan, Wang Xiangchuan, Pan Shilong. Microwave photonics empowered integrated sensing and communication for 6G[J]. IEEE Transactions on Microwave Theory and Techniques, 2025, 73(8): 5295-5315. doi: 10.1109/TMTT.2025.3532810
[8]	Whitehurst L N, Lee M C, Pradipta R. Solar-powered microwave transmission for remote sensing and communications[J]. IEEE Transactions on Plasma Science, 2013, 41(3): 606-612. doi: 10.1109/TPS.2013.2244101
[9]	Yoshida S, Hasegawa N, Kawasaki S. Experimental demonstration of microwave power transmission and wireless communication within a prototype reusable spacecraft[J]. IEEE Microwave and Wireless Components Letters, 2015, 25(8): 556-558. doi: 10.1109/LMWC.2015.2441294
[10]	He Zhili, Lin Xianqi, Yang Xinmi, et al. A flexible microwave ablation antenna for lung cancer treatment[J]. IEEE Antennas and Wireless Propagation Letters, 2023, 22(12): 3147-3151. doi: 10.1109/LAWP.2023.3312147
[11]	Andreev A D. Computer simulations of frequency- and phase-locking of cavity magnetrons[J]. Journal of Electromagnetic Waves and Applications, 2018, 32(12): 1501-1518. doi: 10.1080/09205071.2018.1452636
[12]	郑琼, 毕亮杰, 沈大贵, 等. S波段MW级高效互耦磁控管模式分布调控[J]. 强激光与粒子束, 2024, 36: 083007 doi: 10.11884/HPLPB202436.240109 Zheng Qiong, Bi Liangjie, Shen Dagui, et al. Mode distribution control of S-band MW-level high-efficiency mutual coupling magnetron[J]. High Power Laser and Particle Beams, 2024, 36: 083007 doi: 10.11884/HPLPB202436.240109
[13]	Trew R J. High-frequency solid-state electronic devices[J]. IEEE Transactions on Electron Devices, 2005, 52(5): 638-649. doi: 10.1109/TED.2005.845862
[14]	Li Wenlong, Li Hailong, Qin Yu, et al. Particle-in-cell simulations of injection locking for S-band oven magnetron using ultralow energy[J]. IEEE Transactions on Plasma Science, 2025, 53(2): 245-251. doi: 10.1109/TPS.2025.3532985
[15]	Li Wenlong, Li Hailong, Qin Yu, et al. Phase control demonstration of S-band hybrid phase-locking magnetrons for array applications[J]. IEEE Transactions on Microwave Theory and Techniques, 2025, 73(8): 4699-4708. doi: 10.1109/TMTT.2025.3536474
[16]	Cruz E J, Hoff B W, Pengvanich P, et al. Experiments on peer-to-peer locking of magnetrons[J]. Applied Physics Letters, 2009, 95(19): 191503. doi: 10.1063/1.3262970
[17]	Song Minsheng, Bi Liangjie, Meng Lin, et al. High-efficiency phase-locking of millimeter-wave magnetron for high-power array applications[J]. IEEE Electron Device Letters, 2021, 42(11): 1658-1661. doi: 10.1109/LED.2021.3112563
[18]	Liu Jiayang, Zha Hao, Shi Jiaru, et al. First demonstration and performance of X-band high-power magnetron with parallel cathodes[J]. IEEE Transactions on Electron Devices, 2022, 69(7): 3960-3965. doi: 10.1109/TED.2022.3177390
[19]	秦雨, 刘海霞, 殷勇, 等. 锁相磁控管模块化设计与仿真验证[J]. 强激光与粒子束, 2025, 37: 043004 doi: 10.11884/HPLPB202537.240300 Qin Yu, Liu Haixia, Yin Yong, et al. Modular design and simulation validation of phase-locked magnetrons[J]. High Power Laser and Particle Beams, 2025, 37: 043004 doi: 10.11884/HPLPB202537.240300
[20]	Zhou Hao, Hu Jijun, Shi Jun, et al. Cascaded relativistic magnetron with phase-locked multiport extraction[J]. IEEE Transactions on Electron Devices, 2023, 70(9): 4854-4859. doi: 10.1109/TED.2023.3294455
[21]	谢文楷, 刘盛纲. 微波毫米波功率合成中的锁频和锁相[J]. 电子科学学刊, 1994, 16(4): 416-422 Xie Wenkai, Liu Shenggang. Phase and frequency locking of microwave and millimeter wave power combining[J]. Journal of Electronics, 1994, 16(4): 416-422
[22]	Fu Wenjie, Yan Yang, Li Xiaoyun. Investigation of magnetron injection locking and cascaded locking by solid-state microwave power source[J]. Journal of Microwave Power and Electromagnetic Energy, 2019, 53(3): 171-183. doi: 10.1080/08327823.2019.1643653
[23]	Adler R. A study of locking phenomena in oscillators[J]. Proceedings of the IRE, 1946, 34(6): 351-357. doi: 10.1109/JRPROC.1946.229930
[24]	Tahir I, Dexter A, Carter R. Frequency and phase modulation performance of an injection-locked CW magnetron[J]. IEEE Transactions on Electron Devices, 2006, 53(7): 1721-1729. doi: 10.1109/TED.2006.876268
[25]	Chen Xiaojie, Yu Ze, Lin Hang, et al. Improvements in a 20-kW phase-locked magnetron by anode voltage ripple suppression[J]. IEEE Transactions on Plasma Science, 2020, 48(6): 1879-1885. doi: 10.1109/TPS.2019.2956868