Study of Low- Voltage Radial Convergent Sheet Electron Optical System

Wang, Shaomeng; Gong, Yubin; Wang, Zhanliang; Wei, Yanyu; Duan, Zhaoyun; Feng, Jinjun; Liu, Qingxiang

doi:10.1109/tps.2014.2328619

IEEE Trans. Plasma Sci.

2014

DOI: 10.1109/tps.2014.2328619

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Study of Low- Voltage Radial Convergent Sheet Electron Optical System

Shaomeng Wang

Yubin Gong

Zhanliang Wang

et al.

Abstract: A new kind of radial convergent sheet beam electron optical system, which can be used in low voltage Ka-band radial electron devices, is studied in this paper, including the beam production, transmission, and focus. A novel radial high perveance electron gun is proposed, and its volt-ampere characteristics are obtained by means of simulation. The focusing system using permanent magnet rings is put forward, by which a radial uniform magnetic field can be obtained. With the electron gun and focusing system, a 16… Show more

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Cited by 9 publications

References 12 publications

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Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

Xu¹,

Wang

et al. 2016

IET Microwaves, Antennas & Propagation

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To improve the efficiency of beam‐wave interaction and the gain of the microstrip angular log‐periodic meander‐line (MALPML) travelling wave tube (TWT), a modified phase velocity tapered MALPML (PVT‐MALPML) with 45° chamfer is proposed in this study. Compared with MALPML slow wave structure (SWS), the PVT‐MALPML SWS has better transmission characteristics. Meanwhile, the beam‐wave interaction simulation results show that a higher gain and electron efficiency can be produced by the PVT‐MALPML TWT. By using the novel PVT‐MALPML SWS, the properties of the radial TWT is further improved to meet the requirements of electronic system to TWTs.

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Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

Xu¹,

Wang

et al. 2016

IET Microwaves, Antennas & Propagation

Self Cite

View full text Add to dashboard Cite

show abstract

Novel low-voltage subterahertz-range radial backward wave oscillator

Chen

Wang

2017

Physics of Plasmas

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To increase the output power of compact low-voltage subterahertz-range vacuum electron devices (VEDs) to hundreds of watts and overcome the difficulties of the fabrication and assembly, a novel low-voltage subterahertz-range radial backward wave oscillator (BWO), in which the electron beam emits radially inward and interacts with the slow wave structures (SWSs) machined on a planar plate, is presented in this paper. Compared to the VEDs where the axial electron beam or planar sheet electron beam is adopted, the dispersion curve of the proposed radial BWO is independent of the radius and azimuthal coordinate. Hence, the power capacity is increased by using the overmoded SWSs, and the azimuthal asymmetrical modes cannot be excited.

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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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Study of Low- Voltage Radial Convergent Sheet Electron Optical System

Cited by 9 publications

References 12 publications

Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

Novel low-voltage subterahertz-range radial backward wave oscillator

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

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