A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz

doi:10.1088/1674-1056/24/7/079402

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 79402-079402.doi: 10.1088/1674-1056/24/7/079402

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇

A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz

张开春^{a b}, 漆中阔^{a b}, 杨召龙^{a b}

a THz Center, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
b Cooperative Innovation Center of THz Science, University of Electronic Science and Technology of China, Chengdu 610054, China

收稿日期:2014-11-15 修回日期:2015-01-30 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2014CB339801) and the National High Technology Research and Development Program of China (Grant No. G060104012AA8122007B).

A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz

Zhang Kai-Chun (张开春)^{a b}, Qi Zhong-Kuo (漆中阔)^{a b}, Yang Zhao-Long (杨召龙)^{a b}

a THz Center, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
b Cooperative Innovation Center of THz Science, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2014-11-15 Revised:2015-01-30 Online:2015-07-05 Published:2015-07-05
Contact: Zhang Kai-Chun E-mail:zh.kch@163.com
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2014CB339801) and the National High Technology Research and Development Program of China (Grant No. G060104012AA8122007B).

摘要/Abstract

摘要： A backward wave amplifier (BWA) in a terahertz regime with a novel slow-wave structure (SWS) composed of multi parallel grating pins inside a rectangular waveguide is analyzed. The multi-pin rectangular waveguide SWS possesses good performance and is compatible with micro-fabrication technologies. The dispersion and interaction impedance of the multi-pin SWS are presented. The stopbands of the modes cling together in a Brillouim zone. The SWS has a high interaction impedance that is suitable for the interaction of multi cylindrical beams. The design, which is based on three parallel pins supporting the wave–beam interaction with four cylindrical beams, is verified by three-dimensional particle-in-cell simulations. A BWA with the central frequency at 340 GHz is demonstrated, and the output power is more than 100 mW. A tuning frequency range of 15 GHz (333–348 GHz) is obtained with a gain of more than 20 dB.

关键词: backward wave amplifier (BWA), multi-pin structure, slow-wave structure (SWS), terahertz

Abstract: A backward wave amplifier (BWA) in a terahertz regime with a novel slow-wave structure (SWS) composed of multi parallel grating pins inside a rectangular waveguide is analyzed. The multi-pin rectangular waveguide SWS possesses good performance and is compatible with micro-fabrication technologies. The dispersion and interaction impedance of the multi-pin SWS are presented. The stopbands of the modes cling together in a Brillouim zone. The SWS has a high interaction impedance that is suitable for the interaction of multi cylindrical beams. The design, which is based on three parallel pins supporting the wave–beam interaction with four cylindrical beams, is verified by three-dimensional particle-in-cell simulations. A BWA with the central frequency at 340 GHz is demonstrated, and the output power is more than 100 mW. A tuning frequency range of 15 GHz (333–348 GHz) is obtained with a gain of more than 20 dB.

Key words: backward wave amplifier (BWA), multi-pin structure, slow-wave structure (SWS), terahertz

中图分类号: (Wave/wave, wave/particle interactions)

94.05.Pt

41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 41.60.-m (Radiation by moving charges) 84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))

张开春, 漆中阔, 杨召龙. A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz[J]. 中国物理B, 2015, 24(7): 79402-079402.

Zhang Kai-Chun (张开春), Qi Zhong-Kuo (漆中阔), Yang Zhao-Long (杨召龙). A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz[J]. Chin. Phys. B, 2015, 24(7): 79402-079402.

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A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz

A novel multi-pin rectangular waveguide slow-wave structure based backward wave amplifier at 340 GHz

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