A Highly Overmoded Structure for Hundred-Kilowatt-Class <italic>Ka</italic>-Band Extended Interaction Klystron

Yifan Zu; Xuesong Yuan; Xiaotao Xu; Hailong Li; Qingyun Chen; Matthew Thomas Cole; Lin Meng; Yang Yan

doi:10.1109/TED.2023.3305952

A Highly Overmoded Structure for Hundred-Kilowatt-Class <italic>Ka</italic>-Band Extended Interaction Klystron

Yifan Zu, Xuesong Yuan, Xiaotao Xu, Hailong Li, Qingyun Chen, Matthew Thomas Cole, Lin Meng, Yang Yan

University of Electronic Science and Technology of China

Research output: Contribution to journal › Article › peer-review

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Abstract

Here, we report on the development of highly overmoded structure for a millimeter-wave (MMW) extended interaction klystron (EIK). To enhance electron beam loading, a new method for designing an oversized beam tunnel in a large cavity by concentrating the axial field is demonstrated. The transmission and oscillation characteristics of the interaction circuit operating in the quasi-TM04 mode are tested by the developed mode conversion circuit. Results suggest that a five-cavity EIK based on this highly overmoded structure can achieve an output power of 289 kW at 32.92 GHz with a saturated gain of 51.6 dB by injecting a 3.3-mm-diameter electron beam with a current of 18 A. The output power exceeds 100 kW at a bandwidth of 100 MHz.

Original language	English
Number of pages	7
Journal	IEEE Transactions on Electron Devices
Early online date	29 Aug 2023
DOIs	https://doi.org/10.1109/TED.2023.3305952
Publication status	Published - 14 Sept 2023

Keywords

Circular waveguides
Couplings
Electric fields
Electromagnetic waveguides
Electron beams
Extended interaction klystron (EIK)
highly overmoded structure
Ka-band
Periodic structures
Rectangular waveguides
vacuum electronics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TED.2023.3305952

overmoded_structure_for_megawatt-class_Ka-band_extended_interaction_klystron0610
© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Y. Zu et al., "A Highly Overmoded Structure for Hundred-Kilowatt-Class Ka-Band Extended Interaction Klystron," in IEEE Transactions on Electron Devices, doi: 10.1109/TED.2023.3305952. https://ieeexplore.ieee.org/document/10233238
Accepted author manuscript, 1.63 MB

Cite this

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abstract = "Here, we report on the development of highly overmoded structure for a millimeter-wave (MMW) extended interaction klystron (EIK). To enhance electron beam loading, a new method for designing an oversized beam tunnel in a large cavity by concentrating the axial field is demonstrated. The transmission and oscillation characteristics of the interaction circuit operating in the quasi-TM04 mode are tested by the developed mode conversion circuit. Results suggest that a five-cavity EIK based on this highly overmoded structure can achieve an output power of 289 kW at 32.92 GHz with a saturated gain of 51.6 dB by injecting a 3.3-mm-diameter electron beam with a current of 18 A. The output power exceeds 100 kW at a bandwidth of 100 MHz.",

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AU - Xu, Xiaotao

AU - Li, Hailong

AU - Chen, Qingyun

AU - Cole, Matthew Thomas

AU - Meng, Lin

AU - Yan, Yang

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AB - Here, we report on the development of highly overmoded structure for a millimeter-wave (MMW) extended interaction klystron (EIK). To enhance electron beam loading, a new method for designing an oversized beam tunnel in a large cavity by concentrating the axial field is demonstrated. The transmission and oscillation characteristics of the interaction circuit operating in the quasi-TM04 mode are tested by the developed mode conversion circuit. Results suggest that a five-cavity EIK based on this highly overmoded structure can achieve an output power of 289 kW at 32.92 GHz with a saturated gain of 51.6 dB by injecting a 3.3-mm-diameter electron beam with a current of 18 A. The output power exceeds 100 kW at a bandwidth of 100 MHz.

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A Highly Overmoded Structure for Hundred-Kilowatt-Class <italic>Ka</italic>-Band Extended Interaction Klystron

Abstract

Keywords

ASJC Scopus subject areas

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