Coaxial foilless diode

Kong, Long; Liu, QingXiang; Li, XiangQiang; Wang, ShaoMeng

doi:10.1063/1.4874641

Cited by 3 publications

References 9 publications

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Electron motion analysis of a radial-radiated electron beam in a radial-line drift tube with finite magnetic field conducted

2017

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Radial-radiated electron beam is widely employed in radial-line structure microwave devices. The quality of the electron beam has a crucial effect on the operating performance of these devices. This paper analyzes theoretically this electron motion in a radial-line drift tube with finite magnetic field conducted. The beam width, spatial period, and fluctuation amplitude are quantitatively analyzed with different beam current parameters. By the particle-in-cell simulation, we examine the theoretical analysis under the condition of a designed realistic coil configuration. It indicates that the derived beam envelope function is capable of predicting the radial-radiated beam trajectory approximately. Meanwhile, it is found that the off-axial z-direction magnetic field, in spite of its greatly slight amplitude, is also one necessary consideration for the propagation characteristic of the radial-radiated electron beam. Furthermore, the presented electron motion analysis may be instructive for the design of the electronic optical system of the radial-line structure microwave devices.

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Electron motion analysis of a radial-radiated electron beam in a radial-line drift tube with finite magnetic field conducted

2017

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Dispersion characteristics of V-band radial-line backward-wave oscillators with arbitrary periodic shallow rectangular grooves

2018

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The dispersion characteristics of radial-line slow wave structures with shallow rectangular grooves are examined using the Borgins's potential function method. The whole structure is considered as one region with grooves that satisfy the Rayleigh criterion. In this region, an appropriate Fourier expansion of traveling waves is applicable. By applying suitable boundary conditions, the dispersion equations of an infinite system are obtained, which are solved numerically by calculation and simulation. Comparisons of analytic and numerical results with calculation and simulation show excellent agreement and justify a high degree of confidence in the validity of the theory. The Q-factor and coupling impedance of TM02 mode are higher than that of TM01 mode and that of the quasi-TEM mode with special parameters, while the starting current of TM02 mode is lower than that of TM01 and quasi-TEM modes, which makes the TM02 mode dominate over the start-up of the oscillation. Structural parameters, including period length, corrugation depth, and tube width as well as original radius are considered in detail to choose the exact operating frequency and modes of V-band radial-line backward-wave oscillators (BWOs). More importantly, the presented new dispersion equations can provide a theoretical guidance for the design of V-band radial-line BWOs.

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Analysis and simulation of radial electron beam transmission under non-immersed magnetic field

Kong

Liu

Wang

et al. 2016

2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Coaxial foilless diode

Cited by 3 publications

References 9 publications

Electron motion analysis of a radial-radiated electron beam in a radial-line drift tube with finite magnetic field conducted

Electron motion analysis of a radial-radiated electron beam in a radial-line drift tube with finite magnetic field conducted

Dispersion characteristics of V-band radial-line backward-wave oscillators with arbitrary periodic shallow rectangular grooves

Analysis and simulation of radial electron beam transmission under non-immersed magnetic field

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