Optimization of RFID Sensor with Frequency Modulation

Md. Mazidul Islam, Jinsong Song, Kimmo Rasilainen, Ville Viikari

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


Sensing capabilities of radio frequency identification (RFID) have recently been investigated both theoretically and experimentally. Frequency-modulated sensors utilize the modulation frequency for carrying sensor information when interrogated by a reader device. This paper derives analytical expressions for optimizing the electrical circuitry of such a sensor, as well as a figure of merit for selecting a suitable diode for rectification. A novel design strategy for optimizing an RFID sensor based on frequency modulation is presented, and it is used to design, fabricate, and experimentally characterize an optimized sensor. The result of this paper shows that a change in the sensor capacitance can be detected across a distance of 15 m with low uncertainty.

Original languageEnglish
Article number7485831
Pages (from-to)5993-6002
Number of pages10
JournalIEEE Sensors Journal
Issue number15
Publication statusPublished - 1 Aug 2016
MoE publication typeA1 Journal article-refereed


  • Diode
  • mixer
  • modulation
  • oscillator
  • radiofrequency identification (RFID)
  • rectifier
  • Wireless sensor


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