GHz modulation of carbon nanotube cathodes for microwave amplifiers

GHz modulation of carbon nanotube cathodes for microwave amplifiers

Cold cathodes based on carbon nanotubes (CNs) allow to produce a pulsed/directly modulated electron beam. Using an array of vertically aligned CNs that exhibit an aspect ratio of around 200, we demonstrated the modulation of a 1.5 A/cm/sup 2/ beam at 1.5 GHz frequency. Such CN cathodes are very prom...

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Hauptverfasser: Legagneux, P., Minoux, E., Hudanski, L., Teo, K., Griening, O., Peauger, F., Dieumegard, D., Schnell, J.P., Gangloff, L., Amaratunga, G.A.J., Milne, W.I.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Carbon nanotubes
Cathodes
Costs
Electron beams
Frequency
Microwave amplifiers
Microwave generation
Optical modulation
Pulse amplifiers
Pulse modulation
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Beschreibung
Zusammenfassung:Cold cathodes based on carbon nanotubes (CNs) allow to produce a pulsed/directly modulated electron beam. Using an array of vertically aligned CNs that exhibit an aspect ratio of around 200, we demonstrated the modulation of a 1.5 A/cm/sup 2/ beam at 1.5 GHz frequency. Such CN cathodes are very promising for their use in a new generation of compact and low cost microwave amplifiers that operates between 30 and 100 GHz.
ISSN:1944-9399
1944-9380
DOI:10.1109/NANO.2005.1500670