Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam

ZHAO Xiaoyan; HU Jincheng; ZHANG Haoran; GUO Sidou; FENG Yuming; TANG Lin; ZHANG Kaichun; LIU Diwei

doi:10.23919/cje.2022.00.003

Volume 33 Issue 2

Mar. 2024

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Article Navigation > Chinese Journal of Electronics > 2024 > 33(2): 488-495

Xiaoyan ZHAO, Jincheng HU, Haoran ZHANG, et al., “Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam,” Chinese Journal of Electronics, vol. 33, no. 2, pp. 488–495, 2024 doi: 10.23919/cje.2022.00.003

Citation:

Xiaoyan ZHAO, Jincheng HU, Haoran ZHANG, et al., “Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam,” Chinese Journal of Electronics, vol. 33, no. 2, pp. 488–495, 2024 doi: 10.23919/cje.2022.00.003

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Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam

doi: 10.23919/cje.2022.00.003

1.
THz Center, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
2.
School of Computer Science, Southwest Petroleum University, Chengdu 610500, China

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Author Bio:
Xiaoyan ZHAO received the B.E. degree in School of Physics from University of Electronic Science and Technology of China (UESTC). She is currently studying for the M.S. degree in electronic science and technology in the School of Electronic Science and Engineering at University of Electronic Science and Technology of China, mainly engaged in the basic frontier and applied research of terahertz. (Email: 1374889019@qq.com)

Kaichun ZHANG received the B.S. and M.S. degrees in Sichuan and Ph.D. degree in University of Electronic Science and Technology of China. His research interests inlude terahertz science and technology and its application. (Email: zh.kch@163.com)
Corresponding author: Email: zh.kch@163.com
Received Date: 2022-01-11
Accepted Date: 2022-05-05

Available Online: 2022-09-20

Publish Date: 2024-03-05

Abstract

Abstract

A backward wave oscillator with parallel multiple beams and multi-pin slow-wave structure (SWS) operating at the frequency above 500 GHz is studied. Both the cold-cavity dispersion characteristics and CST Particle Studio simulation results reveal that there are obvious mode competition problems in this kind of terahertz source. Considering that the structure of the multi-pin SWS is similar to that of two-dimensional photonic crystals, we introduce the defects of photonic crystal with the property of filtering into the SWS to suppress high-order modes. Furthermore, a detailed study of the effect of suppressing higher-order modes is carried out in the process of changing location and arrangement pattern of the point defects. The stable, single-mode operation of the terahertz source is realized. The simulation results show that the ratio of the output peak power of the higher-order modes to that of the fundamental mode is less than 1.9%. Also, the source can provide the output peak power of 44.8 mW at the frequency of 502.2 GHz in the case of low beam voltage of 4.7 kV.
- Mode competition,
- Backward wave oscillator,
- Multi-pin slow-wave structure,
- Parallel multiple beams,
- Defects

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References(28)

References

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