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Research on Large-Signal Simulation of Helix-Loaded Azimuthally Periodic Circular Waveguide for 140-GHz TWT

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DOI: 10.23977/jeis.2024.090213 | Downloads: 9 | Views: 131

Author(s)

Yang Liu 1, Xuying Zhang 1, Jun Wang 1, Yujiang Zhao 1, Bing Feng 1

Affiliation(s)

1 Science and Technology on Electronic Information Control Laboratory, Chengdu, 610000, China

Corresponding Author

Yang Liu

ABSTRACT

To address the issues of low output power and focusing difficulties encountered by conventional helix traveling wave tube (TWT) in the short millimeter wave band, a novel helix-loaded azimuthally periodic circular waveguide TWT (HLAP-CW TWT) is proposed in this paper. The novel structure consists of helixes that are arranged periodically about the axis of the conventional circular waveguide. And the N helixes share a single electron beam with a large current value in axial. In this paper, the specific design scheme for the HLAP-CW TWT of 140 GHz is proposed. The dispersion characteristics of the HLAP-CW are studied by HFSS in order to determine the operation voltage of the beam-wave interaction. Furthermore, the 3-D particle-in-cell (PIC) simulations are carried out with the electron beam voltage U=3758V and the electron beam current I=0.25A. In the operation frequency range from 120GHz to 154GHz, the output powers of the HLAP-CW TWT all exceeds 55W with the input power maintained 50mW. The maximum corresponding gain and the highest beam-wave interaction efficiency are 25.98dB and 8.43%, respectively. Therefore, the HLAP-CW TWT is a millimeter-wave amplifier with a wide bandwidth and a large output power, which provides a new solution of the current challenges faced by millimeter-wave TWT.

KEYWORDS

Traveling wave tube, dispersion characteristics, beam-wave interaction, 3-D particle-in-cell simulations, millimeter-wave amplifier

CITE THIS PAPER

Yang Liu, Xuying Zhang, Jun Wang, Yujiang Zhao, Bing Feng, Research on Large-Signal Simulation of Helix-Loaded Azimuthally Periodic Circular Waveguide for 140-GHz TWT. Journal of Electronics and Information Science (2024) Vol. 9: 106-113. DOI: http://dx.doi.org/10.23977/10.23977/jeis.2024.090213.

REFERENCES

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