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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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
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

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title = "A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator",

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.",

author = "Xuesong Yuan and Qingyun Chen and Xiaotao Xu and Matthew Cole and Yu Zhang and Zexiang Chen and Yang Yan",

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doi = "10.1109/TED.2021.3066144",

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T1 - A Carbon Nanotube-based Hundred Watt-level Ka-band Backward Wave Oscillator

AU - Yuan, Xuesong

AU - Chen, Qingyun

AU - Xu, Xiaotao

AU - Cole, Matthew

AU - Zhang, Yu

AU - Chen, Zexiang

AU - Yan, Yang

PY - 2021/5/31

Y1 - 2021/5/31

N2 - 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.

AB - 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.

U2 - 10.1109/TED.2021.3066144

DO - 10.1109/TED.2021.3066144

M3 - Article

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JO - IEEE Transactions on Electron Devices

JF - IEEE Transactions on Electron Devices

SN - 0018-9383

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

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