Theoretical Research on a Multibeam-Modulated Electron Gun Based on Carbon Nanotube Cold Cathodes
Theoretical Research on a Multibeam-Modulated Electron Gun Based on Carbon Nanotube Cold Cathodes
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DOI：
10.1109/ted.2016.2565583
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发表时间：
2016-05
影响因子：
3.1
通讯作者：
Xuesong Yuan;Bin Wang-;M. Cole;Yu Zhang;S. Deng;W. Milne;Yang Yan
中科院分区：
文献类型：
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作者：
Xuesong Yuan;Bin Wang-;M. Cole;Yu Zhang;S. Deng;W. Milne;Yang Yan
本文研究了碳纳米管冷阴极电子枪中的多束流调制，以开发小型化和全集成的真空电子器件。通过将电子源暴露于毫米波信号，稳态场发射电流密度被入射高频（HF）电场有效地调制。模拟结果表明，不同入射频率的毫米波可以有效地调制场发射电流密度。我们发现，调制深度增加高频输入功率和阳极工作电压。每个电子束的调制频率和相位可以使用单个毫米波源并且通过简单地调节相邻CNT冷阴极之间的横向距离来控制。
Multi-beam modulation in a carbon nanotube (CNT) cold cathode electron gun is herein investigated in order to develop miniaturized and fully integrated vacuum electron devices. By exposing the electron source to a millimeter-wave signal, the steady-state field emission current density is efficiently modulated by the incident high-frequency (HF) electric field. Our simulation results of this multibeam electron gun show that the field emission current density can be efficiently modulated by different incident frequency millimeter waves. We find that the modulation depth is increased by enhancing the HF input power and anode operation voltage. The modulation frequency and phase of each electron beam can be controlled using a single millimeter-wave source and by simply adjusting the lateral distance between adjacent CNT cold cathodes.