A microwave dielectric biosensor based on suspended distributed MEMS transmission lines

Lijie Li, Deepak Uttamchandani, Scottish Funding Council under Glasgow Research Partnership in Engineering Scheme (Funder), Royal Society Research (Funder)

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Abstract

Design and characterization of a miniature microwave dielectric biosensor based on distributed microelectromechanical systems (MEMS) transmission lines (DMTL) is reported in this paper. The biosensor has been realized by bonding the DMTL device with an acrylic fluidic channel. In order to demonstrate the sensing mechanism, the sensor is used to detect the small variation of the concentration of aqueous glucose solutions by measuring the electromagnetic resonant frequency shift of the device. It is observed from the results that the second notch of the reflection coefficient (S-11) varies from 7.66 to 7.93 GHz and the third notch of the reflection coefficient varies from 15.81 to 15.24 GHz when the concentration of the glucose solution ranges from 0 to 347 mg/ml, which indicates that higher order notches have higher sensitivities if looking at the absolute change in frequency.
Original languageEnglish
Pages (from-to)1825-1830
Number of pages6
JournalIEEE Sensors Journal
Volume9
Issue number12
DOIs
Publication statusPublished - Dec 2009

Keywords

  • biosensor
  • distributed microelectromechanical systems
  • MEMS
  • transmission lines
  • DMTL
  • glucose

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    Li, L., Uttamchandani, D., Scottish Funding Council under Glasgow Research Partnership in Engineering Scheme (Funder), & Royal Society Research (Funder) (2009). A microwave dielectric biosensor based on suspended distributed MEMS transmission lines. IEEE Sensors Journal, 9(12), 1825-1830. https://doi.org/10.1109/JSEN.2009.2031388