A Review of Frequency Synthesizer-based Microwave Chemical Sensors for Dielectric Detection of Organic Liquids Conference Paper uri icon


  • This paper presents a review of recently reported chemical sensors for dielectric detection at microwave frequencies. The sensors are based on a sensing element exposed to materials under test (MUT) as a part of a VCO inside a frequency synthesizer loop. The permittivity of the MUT is translated into a change in the free running frequency of the VCO and the DC control voltage of the loop which is read out using an Analog-to-Digital converter for further processing. Two different on-board and on-chip prototypes are presented and compared. © 2013 IEEE.

author list (cited authors)

  • Entesari, K., Helmy, A. A., & Sekar, V.

citation count

  • 0

publication date

  • April 2013