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Radio-frequency characterization of varactors based on carbon nanotube arrays

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    Rights statement: Copyright © 2008 by Institution of Mechanical Engineers. All rights reserved.

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Original languageEnglish
Pages (from-to)111-115
JournalProceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanoengineering and Nanosystems
Issue number3
Publication statusPublished - 1 Sep 2008


Arrays of carbon nanotubes were reversibly actuated by applying a bias voltage. The actuation results in a variable capacitance between the arrays, which can be used to build a varactor. The capacitances were evaluated by simulating the scattering parameters in an equivalent electrical circuit while using the capacitance between the arrays as a fitting parameter. These simulations were compared with radio-frequency (RF) measurements on devices. A very good agreement between measurement and model was obtained. The capacitance could be varied by more than 20 per cent before the arrays were pulled into contact.

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