TY - GEN
T1 - Wireless performance of a fully passive neurorecording microsystem embedded in dispersive human head phantom
AU - Schwerdt, Helen N.
AU - Chae, Junseok
AU - Miranda, Felix A.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.1109/APS.2012.6349103
DO - 10.1109/APS.2012.6349103
M3 - Conference contribution
AN - SCOPUS:84870507051
SN - 9781467304627
T3 - IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
BT - 2012 IEEE International Symposiumon Antennas and Propagation, APSURSI 2012 - Proceedings
T2 - Joint 2012 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, APSURSI 2012
Y2 - 8 July 2012 through 14 July 2012
ER -