Investigation of a wideband folded double-ridged waveguide slow-wave system

doi:10.1088/1674-1056/20/5/054102

中国物理B ›› 2011, Vol. 20 ›› Issue (5): 54102-054102.doi: 10.1088/1674-1056/20/5/054102

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇下一篇

Investigation of a wideband folded double-ridged waveguide slow-wave system

何俊, 魏彦玉, 宫玉彬, 王文祥

Vacuum Electronics National Laboratory, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

收稿日期:2010-08-13 修回日期:2010-12-24 出版日期:2011-05-15 发布日期:2011-05-15
基金资助:
Project supported in part by the National Natural Science Foundation of China (Grant No. 60971038) and in part by the Fundamental Research Funds for Central Universities, China (Grant No. ZYGX2009Z003).

Investigation of a wideband folded double-ridged waveguide slow-wave system

He Jun(何俊), Wei Yan-Yu(魏彦玉)^†, Gong Yu-Bin(宫玉彬), and Wang Wen-Xiang(王文祥)

Vacuum Electronics National Laboratory, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2010-08-13 Revised:2010-12-24 Online:2011-05-15 Published:2011-05-15
Supported by:
Project supported in part by the National Natural Science Foundation of China (Grant No. 60971038) and in part by the Fundamental Research Funds for Central Universities, China (Grant No. ZYGX2009Z003).

摘要/Abstract

摘要： The folded double-ridged waveguide structure is presented and its properties used for wide-band traveling-wave tube are investigated. Expressions of dispersion characteristics, normalized phase velocity and interaction impedance of this structure are derived and numerically calculated. The calculated results using our theory agree well with those obtained by using the 3D electromagnetic simulation software HFSS. Influences of the ridge-loaded area and broad-wall dimensions on the high frequency characteristics of the novel slow-wave structure are discussed. It is shown that the folded double-ridged waveguide structure has a much wider relative passband than the folded waveguide slow-wave structure and a relative passband of 67% could be obtained, indicating that this structure can operate in broad-band frequency ranges of beam–wave interaction. The small signal gain property is investigated for ensuring the improvement of bandwidth. Meanwhile, with comparable dispersion characteristics, the transverse section dimension of this novel structure is much smaller than that of conventional one, which indicates an available way to reduce the weight of traveling-wave tube.

Abstract: The folded double-ridged waveguide structure is presented and its properties used for wide-band traveling-wave tube are investigated. Expressions of dispersion characteristics, normalized phase velocity and interaction impedance of this structure are derived and numerically calculated. The calculated results using our theory agree well with those obtained by using the 3D electromagnetic simulation software HFSS. Influences of the ridge-loaded area and broad-wall dimensions on the high frequency characteristics of the novel slow-wave structure are discussed. It is shown that the folded double-ridged waveguide structure has a much wider relative passband than the folded waveguide slow-wave structure and a relative passband of 67% could be obtained, indicating that this structure can operate in broad-band frequency ranges of beam–wave interaction. The small signal gain property is investigated for ensuring the improvement of bandwidth. Meanwhile, with comparable dispersion characteristics, the transverse section dimension of this novel structure is much smaller than that of conventional one, which indicates an available way to reduce the weight of traveling-wave tube.

Key words: millimeter wave traveling-wave tube, slow-wave structure, folded waveguide, high-frequency characteristics

中图分类号: (Electromagnetic wave propagation; radiowave propagation)

41.20.Jb

41.60.Cr (Free-electron lasers)

何俊, 魏彦玉, 宫玉彬, 王文祥. Investigation of a wideband folded double-ridged waveguide slow-wave system[J]. 中国物理B, 2011, 20(5): 54102-054102.

He Jun(何俊), Wei Yan-Yu(魏彦玉), Gong Yu-Bin(宫玉彬), and Wang Wen-Xiang(王文祥). Investigation of a wideband folded double-ridged waveguide slow-wave system[J]. Chin. Phys. B, 2011, 20(5): 54102-054102.

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Investigation of a wideband folded double-ridged waveguide slow-wave system

Investigation of a wideband folded double-ridged waveguide slow-wave system

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