TY - JOUR
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
N1 - Funding Information:
Manuscript received January 21, 2021; revised March 3, 2021; accepted March 10, 2021. Date of publication March 29, 2021; date of current version April 22, 2021. 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: yuanxs@uestc.edu.cn; cqy@uestc.edu.cn).
Publisher Copyright:
© 1963-2012 IEEE.
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.
KW - Backward wave oscillator (BWO)
KW - carbon nanotube (CNT)
KW - cold cathode
KW - field emission (FE)
KW - high power
KW - millimeter-wave (MMW) radiation
UR - http://www.scopus.com/inward/record.url?scp=85103782688&partnerID=8YFLogxK
U2 - 10.1109/TED.2021.3066144
DO - 10.1109/TED.2021.3066144
M3 - Article
SN - 0018-9383
VL - 68
SP - 2467
EP - 2472
JO - IEEE Transactions on Electron Devices
JF - IEEE Transactions on Electron Devices
IS - 5
M1 - 9388792
ER -