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Theoretical Research on a Multibeam-Modulated Electron Gun Based on Carbon Nanotube Cold Cathodes

Accepted version
Peer-reviewed

Type

Article

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Authors

Yuan, X 
Wang, B 
Cole, MT 
Zhang, Y 
Deng, S 

Abstract

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 multi-beam 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.

Description

Keywords

Carbon nanotube (CNT), cold cathode, electron gun, multibeam

Journal Title

IEEE Transactions on Electron Devices

Conference Name

Journal ISSN

0018-9383
1557-9646

Volume Title

Publisher

Institute of Electrical and Electronics Engineers (IEEE)
Sponsorship
This work was supported in part by the National Basic Research Program of China under Grant 2013CB933603 and in part by the National Natural Science Foundation of China under Grant U1134006 and Grant 6110104.