New experimental results on the gyro-TWT with a helically grooved waveguide

Bratman, V. L.; Денисов, Г. Г.; Мануилов, В. Н.; Kalynova, G. I.; Ofitserov, M. M.; Samsonov, S.V.; Volkov, A.B.

doi:10.1109/icmmt.2002.1187642

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…This characteristic is advantageous for bandwidth extension, and the structure exhibits lower sensi- tivity to velocity spread [5,6]. Many experiments in IAP have proved the main theoretical predictions and advantages of gyro-TWTs with helically corrugated waveguides [4,[7][8][9][10][11][12][13][14][15][16]. In addition to IAP, the University of Strathclyde in the United Kingdom has also been dedicated to research on helically corrugated waveguides [17].…”

Section: Introductionmentioning

confidence: 99%

Research on a Ka‐band large‐orbit gyro‐TWT with periodic dielectric‐loaded structure

Jintao,

Efeng,

Chaojun

et al. 2023

Electronics Letters

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This paper presents a design of a gyro‐TWT operating in the large‐orbit electron beam mode, with the aim of reducing the working magnetic field while ensuring operational efficiency. The periodic dielectric‐loaded structure, which has been successfully applied in the development of small‐orbit devices, is adopted as the high‐frequency interaction circuit. This paper conducts a comprehensive study and analysis of this structure and achieves stable operation in the Ka‐band after the optimization of the tube. This tube works at second harmonic of electron frequency in the mode of large‐orbit electron beam. The required magnetic field is only 5100 gauss, which can be generated using electromagnetic coils instead of superconducting magnets. The operational parameters include voltage of 75 kV, current of 9A, and velocity spread of 3.5%. Under these conditions, the device presents stable operation, with −3 dB bandwidth of 4.3 GHz, and maximum output power of 165 kW. This result meets the expected requirements for magnetic field and operational efficiency, thus validating the feasibility of practical fabrication of large‐orbit gyro‐TWT with periodic dielectric‐loaded structure.

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Section: Introductionmentioning

confidence: 99%

Research on a Ka‐band large‐orbit gyro‐TWT with periodic dielectric‐loaded structure

Jintao,

Efeng,

Chaojun

et al. 2023

Electronics Letters

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“…The setup means the system has three dielectric discs and five dielectric layers. This type of window has been realised throughout the frequency bands from X-band [11], Ka-band [12] up to W-band [13,14].…”

Section: Introductionmentioning

confidence: 99%

Design of a multilayer output window for a 372 GHz gyro-TWA

Donaldson

Zhang

Cross

et al. 2017

2017 Eighteenth International Vacuum Electronics Conference (IVEC)

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“…than 20 dB over 7.5-9.2 GHz [3], Ka-band with reflections lower than 30 dB over 32. GHz [4] and W-band with reflections lower than 20 dB over 80-107 GHz [5]. Previously a multilayer window was reported over the 90-100 GHz range operating with the TE mode as the input microwave signal [6].…”

Section: Introductionmentioning

confidence: 99%

Wide-Band ${\hbox{HE}}_{11}$ Mode Terahertz Wave Windows for Gyro-Amplifiers

Donaldson

McElhinney

Zhang

et al. 2016

IEEE Trans. THz Sci. Technol.

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Broadband HE mode output windows, based on the multilayer concept, are studied for high power gyro-amplifiers operating in the low terahertz region. As the wave power in the hybrid HE mode is concentrated in the center of the circular waveguide, smaller reflection and better coupling to the fundamental free space Gaussian mode can be achieved for the windows. Two windows are designed for optimized performance through simulations for operation in two frequency ranges of 360-400 GHz and 90-100 GHz. The simulated performance, practical constraints in realization and manufacturing methods of the 90-100 GHz window is discussed. This window was constructed and microwave properties measured showing a lower than 27 dB reflection. This result agrees with simulation data which validates the simulation methodology and effectiveness of the design.

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New experimental results on the gyro-TWT with a helically grooved waveguide

Cited by 6 publications

References 5 publications

Research on a Ka‐band large‐orbit gyro‐TWT with periodic dielectric‐loaded structure

Research on a Ka‐band large‐orbit gyro‐TWT with periodic dielectric‐loaded structure

Design of a multilayer output window for a 372 GHz gyro-TWA

Wide-Band ${\hbox{HE}}_{11}$ Mode Terahertz Wave Windows for Gyro-Amplifiers

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