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

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

Content Provider	NASA Technical Reports Server (NTRS)
Author	Chae, Junseok Miranda, Felix A. Schwerdt, Helen N.
Copyright Year	2012
Description	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 (2f(sub 0) plus or minus f(sub m)=4.4-4.9 GHZ) containing targeted neuropotential signals (fm approximately equal to 1-1000 Hz). The microsystem is enclosed in 4 micrometer thick parylene-C for biocompatibility and has a footprint of 4 millimeters x 12 millimeters x 500 micrometers. Preliminary testing of the microsystem implanted in the lossy biological simulating media results in signal-to-noise ratio's (SNR) near 22 (SNR approximately equal to 38 in free space) for millivolt level neuropotentials, demonstrating the potential for fully passive wireless microsystems in implantable medical applications.
File Size	10048519
Page Count	28
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120015088
Archival Resource Key	ark:/13960/t3vt6n98p
Language	English
Publisher Date	2012-07-07
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Implanted Electrodes Biology Data Recorders Signal To Noise Ratios Dielectric Properties Biomedical Data Microelectronics Wireless Communication Fabrication Neurology Slot Antennas Biocompatibility Miniaturization Head Anatomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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