Radio-frequency characterization of varactors based on carbon nanotube arrays

J. Ek-Weis, A. Eriksson, T. Idda, N. Olofsson, E. E.B. Campbell

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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.

Original languageEnglish
Pages (from-to)111-115
Number of pages5
JournalProceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanoengineering and Nanosystems
Issue number3-4
StatePublished - 2008


  • Carbon nanotube
  • RF measurements
  • Varactor


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