A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator

Xuesong Yuan; Qingyun Chen; Xiaotao Xu; Matthew Cole; Yu Zhang; Zexiang Chen; Yang Yan

doi:10.1109/TED.2021.3066144

A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator

Xuesong Yuan, Qingyun Chen, Xiaotao Xu, Matthew Cole, Yu Zhang, Zexiang Chen, Yang Yan

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6 Citations (SciVal)

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Abstract

Carbon nanotube (CNT) cold-cathodes hold much promise in a variety of millimeter-wave and terahertz vacuum electronic radiation devices due to their inherent near instantaneous temporal turn-on and near-ideal ideal field electron emission performance. Here we report on the development of a CNT cold-cathode Ka -band backward-wave oscillator (BWO). Using a novel beam compression stage, theoretical studies, simulation results, and empirical findings collectively demonstrate that this device affords an unprecedentedly high output power of 230 W at a technologically important operating frequency of 33.65 GHz. The developed magnetic injection electron gun achieves a high emission current of 265.5 mA (emission current density of 188.3 mA/cm 2 ) and a high focused beam current density of 18.5 A/cm 2 , which our studies suggest, is essential to the BWOs high output power.

Original language	English
Article number	9388792
Pages (from-to)	2467 - 2472
Number of pages	6
Journal	IEEE Transactions on Electron Devices
Volume	68
Issue number	5
Early online date	29 Mar 2021
DOIs	https://doi.org/10.1109/TED.2021.3066144
Publication status	Published - 31 May 2021

Funding

This work was supported in part by the National Key Research and Development Program of China under Grant 2019YFA0210202, in part by the National Natural Science Foundation of China under Grant 61771096, in part by the Sichuan Science and Technology Program under Grant 2021YJ0096, and in part by the Fundamental Research Funds for the Central Universities under Grant ZYGX2019J012. The review of this article was arranged by Editor R. Letizia. (Xuesong Yuan and Qingyun Chen are co-first authors.) (Corresponding author: Xuesong Yuan.) Xuesong Yuan, Qingyun Chen, Xiaotao Xu, and Yang Yan are with the School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China (e-mail: [email protected]; [email protected]).

Keywords

Backward wave oscillator (BWO)
carbon nanotube (CNT)
cold cathode
field emission (FE)
high power
millimeter-wave (MMW) radiation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TED.2021.3066144

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Cite this

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abstract = "Carbon nanotube (CNT) cold-cathodes hold much promise in a variety of millimeter-wave and terahertz vacuum electronic radiation devices due to their inherent near instantaneous temporal turn-on and near-ideal ideal field electron emission performance. Here we report on the development of a CNT cold-cathode Ka -band backward-wave oscillator (BWO). Using a novel beam compression stage, theoretical studies, simulation results, and empirical findings collectively demonstrate that this device affords an unprecedentedly high output power of 230 W at a technologically important operating frequency of 33.65 GHz. The developed magnetic injection electron gun achieves a high emission current of 265.5 mA (emission current density of 188.3 mA/cm 2 ) and a high focused beam current density of 18.5 A/cm 2 , which our studies suggest, is essential to the BWOs high output power.",

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AU - Zhang, Yu

AU - Chen, Zexiang

AU - Yan, Yang

PY - 2021/5/31

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KW - field emission (FE)

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A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator

Abstract

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Keywords

ASJC Scopus subject areas

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