Continuous Wave Operation of a Ka-Band Broadband High-Power Sheet Beam Traveling-Wave Tube

Wang, Jianxun; Wan, Yixin; Li, Xinjie; Liu, Qiang; Li, Hao; Yao, Yelei; Zheng, Qiang; Wu, Zewei; Jiang, Wei; Liu, Guo; Pu, Youlei; Wang, Li; Luo, Yong

doi:10.1109/led.2021.3078484

Cited by 23 publications

(1 citation statement)

References 18 publications

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“…The PCM focused sheet-beam TWT was first demonstrated at Ka band with beam transmission of 93% with a voltage of 24.3 kV [10]. At the same frequency band, a PCMfocused high-power sheet-beam TWT was recently reported [11] with a CW power output of up to 3 kW, along with a transmission of 97% at a voltage of 30.9 kV and a current of 0.82 A. In addition, a W-band PCM-focused sheet-beam extended-interaction oscillator (EIO) was demonstrated with a transport of 94.4% at a high operating voltage of ~47 kV [12].…”

Section: Introductionmentioning

confidence: 99%

Design and Experiments of the Sheet Electron Beam Transport with Periodic Cusped Magnetic Focusing for Terahertz Traveling-Wave Tubes

Zhang¹,

Pan²,

Chen³

et al. 2021

Electronics

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The successful transport of a sheet electron beam under the periodic cusped magnet (PCM) focusing at the terahertz frequencies is reported. The sheet beam with a current density of 285 A/cm2 is intended for the developing G-band sheet-beam traveling-wave tube (TWT) whose operating voltage is nominally 24.5 kV. A beamstick was developed to validate the design of the electron optics system, which is considered as the most challenging part for developing a sheet-beam device. A beam transmission ratio of 81% is achieved over a distance of 37.5 mm at a cathode voltage of −25.0 kV. The total current and the collector current were measured to be 125 and 102 mA, respectively. The experimental results are promising, demonstrating that the PCM scheme is capable of focusing a high-current-density sheet beam and hence can find use in the terahertz TWTs, offering the advantages of compact size and light weight.

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Section: Introductionmentioning

confidence: 99%

Design and Experiments of the Sheet Electron Beam Transport with Periodic Cusped Magnetic Focusing for Terahertz Traveling-Wave Tubes

Zhang¹,

Pan²,

Chen³

et al. 2021

Electronics

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A new approach of using low magnetic field to focus SEB

Yin

Yue

et al. 2021

Physics of Plasmas

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The transport of sheet electron beam (SEB) is of critical importance for the success of a number of high-power millimeter wave and terahertz vacuum devices. In this paper, the condition to achieve the SEB's stable transport in uniform longitudinal magnetic field is studied. Based on this stability condition, a new approach, named sheet electron beam matching focusing magnetic (SEB-MFM) field, which consists of a longitudinal component and a tiny transverse component, is presented. The SEB-MFM field can be generated by adding extra transversely magnetized magnets to the conventional uniform magnetic (UM) system. For demonstrating the effect of the SEB-MFM field, the simulation work of the SEB-MFM field and conventional UM field is carried out for an electron optical system employing a SEB. The simulation results show that the SEB-MFM field effectively eliminates the instabilities, such as distortion and deformation, arising from the longitudinal magnetic field. In addition, comparing with conventional UM field, the SEB-MFM can achieve the stable and long-distance transport of a SEB with a pretty low magnetic field strength. Finally, a new magnetic system generating SEB-MFM field is designed, fabricated, and measured.

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A Staggered Double Vane Slow-wave Structure of 0.34 THz Sheet beam traveling wave tube

Ren

Lin

et al. 2022

2022 Cross Strait Radio Science &Amp; Wireless Technology Conference (CSRSWTC)

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Continuous Wave Operation of a Ka-Band Broadband High-Power Sheet Beam Traveling-Wave Tube

Cited by 23 publications

References 18 publications

Design and Experiments of the Sheet Electron Beam Transport with Periodic Cusped Magnetic Focusing for Terahertz Traveling-Wave Tubes

Design and Experiments of the Sheet Electron Beam Transport with Periodic Cusped Magnetic Focusing for Terahertz Traveling-Wave Tubes

A new approach of using low magnetic field to focus SEB

A Staggered Double Vane Slow-wave Structure of 0.34 THz Sheet beam traveling wave tube

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