A Carbon Nanotube-Based Hundred Watt-Level Ka-Band Backward Wave Oscillator

被引：6
|
作者：
Yuan, Xuesong [1 ]
Chen, Qingyun [1 ]
Xu, Xiaotao [1 ]
Cole, Matthew T. [2 ]
Zhang, Yu [3 ]
Chen, Zexiang [4 ]
Yan, Yang [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 610054, Peoples R China
[2] Univ Bath, Dept Elect & Elect Engn, Bath BA2 7AY, Avon, England
[3] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China
[4] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China
来源：
IEEE TRANSACTIONS ON ELECTRON DEVICES | 2021年 / 68卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Backward wave oscillator (BWO); carbon nanotube (CNT); cold cathode; field emission (FE); high power; millimeter-wave (MMW) radiation; FIELD-EMISSION; CATHODES; DRIVEN; BEAM;
D O I：
10.1109/TED.2021.3066144
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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 backwardwave 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.
引用
收藏
页码：2467 / 2472
页数：6
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