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Cold-Test Experimental Research of an S-Band Broadband High Power CCTWT

Chinese Physics C 2008年第Z1期32卷 178-180页

作者：李文君许州林郁正沈旭明刘婕陈亚男黎明杨兴繁中国工程物理研究院应用电子学研究所绵阳621900 清华大学工程物理系加速器实验室北京100084

Cold-test experiment of an S-band broadband high power coupled-cavity traveling-wave tube(CCTWT)is introduced in this *** dispersion characteristic,the synchronous voltage and the interaction impedance of this S-band ... 详细信息

关键词： coupled-cavity traveling-wave tube cold-test dispersion characteristic interaction impedance synchronous voltage

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Accurate analysis of arbitrarily-shaped helical groove waveguide

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Chinese Physics B 2006年第9期15卷 2114-2119页

作者：刘洪涛魏彦玉宫玉彬岳玲娜王文祥 National Key Laboratory of High Power Vacuum Electronics School of Physical Electronics University of Electronic Science and Technology of China Chengdu 610054

This paper presents a theory on accurately analysing the dispersion relation and the interaction impedance of electromagnetic waves propagating through a helical groove waveguide with arbitrary groove shape, in which the complex groove profile is synthesized by a series of rectangular steps. By introducing the influence of high-order evanescent modes on the connection of any two neighbouring steps by an equivalent susceptance under a modified admittance matching condition, the assumption of the neglecting discontinuity capacitance in previously published analysis is avoided, and the accurate dispersion equation is obtained by means of a combination of field-matching method and admittancematching technique. The validity of this theory is proved by comparison between the measurements and the numerical calculations for two kinds of helical groove waveguides with different groove shapes.

关键词： helical groove waveguide dispersion characteristic interaction impedance travelling wave tube

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Research on the Characteristic of the Disk-Loaded Waveguide, Rib-Loaded Disk-Loaded Waveguide and Helix Slow-Wave Structures

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Journal of Electronic Science and Technology of China 2005年第2期3卷 188-189页

作者： ZHANGYong SchoolofPhysicalElectronicsUniversityofElectronicScienceandTechnologyofChinaChengdu610054China

The fast development of modern electronic warfare, broadband high power array radar system, high power jammer and microwave directional power weapon imposes high demand on high power microwave resource. With such features as high power, broadband, multi-mode, etc., traveling wave tubes (TWTs) play an important role in the high power microwave amplifiers. Since the slow-wave system is the core of beam-wave interaction in TWTs, the function and performance of it directly determine the capability of the TWTs.

关键词： traveling wave tube disk-loaded waveguide helix slow-wave structure dispersion characteristics interaction impedance plasma filled computer simulation rib-loaded hybrid mode

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Ka-band Folded Waveguide Traveling-Wave Tube Experiment

Ka-band Folded Waveguide Traveling-Wave Tube Experiment

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2002 3rd International Conference on Microwave and Millimeter Wave Technology

作者： Seong-Tae Han Jung-Il Kim Baofu Jia Gun-Sik Park Suk-Sang Chang School of Physics Seoul National University 151-742SeoulKorea Pohang University of Science and Technology(POSTECH)790-784 PohangKyungbukKorea

ISBN: (纸本)078037486X

＜正＞The method to synthesize the main parameters of folded waveguide traveling tube（FWTWT） is studied and used for designing Ka-band *** estimate the synthesis,cold and hot characteristics such as phase velocity,interaction impedance and growth rate,are calculated and compared with those obtained by the simulation using HFSS and MAGIC.A Ka-band folded waveguide TWT using 12 kV,120 mA electron beam is designed from the synthesis and *** and experimental details will be *** addition, 2n-mode stop band due to fabrication error studied and LIGA fabrication as an alternative method to overcome this phenomenon is considered.

关键词： travelling wave tubes millimetre wave tubes LIGA dispersion (wave) simulation Ka-band TWT folded waveguide TWT phase velocity interaction impedance growth rate HFSS MAGIC simulation electron beam synthesis 2/spl Pi/-mode stop band fabrication error LIGA fabrication 12 kV 120 mA

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Effect of Helical Slow-wave structure Parameter Variations on TWT Cold-Test Characteristics

Effect of Helical Slow-wave structure Parameter Variations o...

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The 5th International Vacuum Electron Sources Conference(IVESC2004)

作者： Li Shi Liu Wei Su Xiao-bao Yin He-jun Institute of Electronics Chinese Academy of Sciences P.R.China P.O.Box2652 Beijing 100080 P.R.China

In this paper, the quasi-periodic boundary conditions in the computer code MAFIA is used to determine the effect on dispersion and on-axis interaction impedance of helical slow-wave structure and the Finite Element Method software-ANSYS is used to simulate the helix pressure distortion. The result is that, with the variations of axial width and height of the helical tape, only a slight effect in the phase velocity, but more effect in the interaction impedance. There is a best point on both axial width and height of the helical tape for the interaction impedance. Both dispersion and on-axis interaction impedance are increased with helix deformation, in which the radial relative deformation is less then 1%. While radial relative deformation is more then 1%, the on-axis interaction impedance will be decreased.

关键词： traveling-wave tube helical slow-wave structure dispersion interaction impedance

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