A 5×5 Microwave Permittivity Sensor Matrix in O.14-m CMOS

Zhebin Hu, Gerasimos Vlachogiannakis, Michiel A.P. Pertijs, Leo De Vreede, Marco Spirito

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
22 Downloads (Pure)

Abstract

A 0.14-μ m CMOS 2-D permittivity imaging matrix prototype operating at microwave frequencies is presented. It comprises 25 permittivity-sensing pixels, each consisting of a sensing patch connected to a dedicated RF bridge. A trans-conduct-ance stage converts the imbalance voltage to a current signal, subsequently down-converted to an intermediate frequency and sampled. The implemented sensor matrix shows precise permittivity measurements over a range of 0.1-10 GHz, and successfully demonstrates permittivity contrast with a resolution of 0.1 - 2.3 from 0.1 to 10 GHz when the matrix is interfaced with various dielectrics. Owing to the matrix implementation a sub-mm, permittivity discontinuity is easily resolved by the presented sensor device.

Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
EditorsS. Kanamaluru
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1160-1163
Number of pages4
Volume2018-June
ISBN (Print)978-1-5386-5067-7
DOIs
Publication statusPublished - 2018
Event2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States
Duration: 10 Jun 201815 Jun 2018

Conference

Conference2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
CountryUnited States
CityPhiladelphia
Period10/06/1815/06/18

Keywords

  • Bridge circuits
  • Chemical and biological sensors
  • CMOS integrated circuits
  • Microwave sensors
  • Permittivity

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