Design of a reentrant double staggered ladder circuit for V-band coupled-cavity traveling-wave tube

doi:10.1088/1674-1056/21/7/074202

Abstract The reentrant double staggered ladder slow-wave structure is employed in a high-power V-band coupled-cavity traveling-wave tube. This structure has a wide bandwidth, a moderate interaction impedance, and excellent thermal dissipation properties, besides the easy fabrication. A well-matched waveguide coupler is proposed for the structure. Combining the design of attenuators, a full-scale three-dimensional circuit model for the V-band coupled-cavity traveling-wave tube is constructed. The electromagnetic characteristics and the beam--wave interaction of this structure are investigated. The beam current is set to be 100 mA, and the cathode voltage is tuned from 16.8 kV to 15.8 kV. The calculation results show that this tube can produce a saturated average output power over 100 W with an instantaneous bandwidth greater than 1.25 GHz in the frequency ranging from 58 GHz to 62 GHz. The corresponding gain and electronic efficiency can reach over 32 dB and 6.5%, respectively.

Keywords: coupled-cavity traveling-wave tube V band reentrant double staggered ladder slow-wave structure

Received: 26 October 2011
Revised: 13 December 2011
Accepted manuscript online:

PACS:	42.60.Da	(Resonators, cavities, amplifiers, arrays, and rings)
	07.57.Hm	(Infrared, submillimeter wave, microwave, and radiowave sources)
	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)

Fund: Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 61125103), the Vacuum Electronics National Lab Foundation, China (Grant No. 9140C050101110C0501), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. ZYGX2009Z003 and ZYGX2010J054).

Corresponding Authors: Gong Yu-Bin
E-mail: ybgong@uestc.edu.cn

Cite this article:

Liu Yang(刘洋), Xu Jin(徐进), Lai Jian-Qiang(赖剑强), Xu Xiong(许雄), Shen Fei(沈飞), Wei Yan-Yu(魏彦玉), Huang Min-Zhi(黄民智), Tang Tao(唐涛), and Gong Yu-Bin(宫玉彬) Design of a reentrant double staggered ladder circuit for V-band coupled-cavity traveling-wave tube 2012 Chin. Phys. B 21 074202

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Design of a reentrant double staggered ladder circuit for V-band coupled-cavity traveling-wave tube

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