Wireless performance of a fully passive neurorecording microsystem embedded in dispersive human head phantom

Helen N. Schwerdt, Junseok Chae, Felix A. Miranda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

This paper reports the wireless performance of a biocompatible fully passive microsystem implanted in phantom media simulating the dispersive dielectric properties of the human head, for potential application in recording cortical neuropotentials. Fully passive wireless operation is achieved by means of backscattering electromagnetic (EM) waves carrying 3rd order harmonic mixing products (2f0±fm=4.44.9 GHz) containing targeted neuropotential signals (fm11000 Hz). The microsystem is enclosed in 4 μm thick parylene-C for biocompatibility and has a footprint of 4 mm × 12 mm × 500 μm. Preliminary testing of the microsystem implanted in the lossy biological simulating media results in signal-to-noise ratio's (SNR) near 22 (SNR38 in free space) for millivolt level neuropotentials, demonstrating the potential for fully passive wireless microsystems in implantable medical applications.

Original languageEnglish (US)
Title of host publication2012 IEEE International Symposiumon Antennas and Propagation, APSURSI 2012 - Proceedings
DOIs
StatePublished - 2012
EventJoint 2012 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, APSURSI 2012 - Chicago, IL, United States
Duration: Jul 8 2012Jul 14 2012

Publication series

NameIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
ISSN (Print)1522-3965

Other

OtherJoint 2012 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, APSURSI 2012
CountryUnited States
CityChicago, IL
Period7/8/127/14/12

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Schwerdt, H. N., Chae, J., & Miranda, F. A. (2012). Wireless performance of a fully passive neurorecording microsystem embedded in dispersive human head phantom. In 2012 IEEE International Symposiumon Antennas and Propagation, APSURSI 2012 - Proceedings [6349103] (IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)). https://doi.org/10.1109/APS.2012.6349103