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Journal of Nanomaterials
Volume 2012 (2012), Article ID 724121, 7 pages
http://dx.doi.org/10.1155/2012/724121
Research Article

Improving the RF Performance of Carbon Nanotube Field Effect Transistor

Faculty of Sciences I, Lebanese University, Beirut, Lebanon

Received 27 September 2011; Accepted 9 February 2012

Academic Editor: Teng Li

Copyright © 2012 S. Hamieh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Compact model of single-walled semiconducting carbon nanotube field-effect transistors (CNTFETs) implementing the calculation of energy conduction subband minima under VHDLAMS simulator is used to explore the high-frequency performance potential of CNTFET. The cutoff frequency expected for a MOSFET-like CNTFET is well below the performance limit, due to the large parasitic capacitance between electrodes. We show that using an array of parallel nanotubes as the transistor channel combined in a finger geometry to produce a single transistor significantly reduces the parasitic capacitance per tube and, thereby, improves high-frequency performance.