TY - GEN
T1 - A miniature fully-passive microwave back-scattering device for short-range telemetry of neural potentials
AU - Abbaspour-Tamijani, Abbas
AU - Farooqui, Muhammad F.
AU - Towe, Bruce C.
AU - Chae, Junseok
PY - 2008
Y1 - 2008
N2 - This paper describes a fully passive telemetry technique based on microwave backscattering. In this technique, a subharmonically-pumped passive mixer is coupled to a bio-probe and one or two miniature antennas. When interrogated by an RF excitation, this device generates an amplitude modulated RF backscattering component centered at twice the frequency of excitation. An external sensitive receiver can be used to demodulate the backscattering component and recover the bio-potential. A simple prototype based on solid state diodes has been fabricated and tested for 2.4/4.8 GHz and has the dimensions of 11.5 × 4.6 mm2 and thickness of -1 mm. Experiments with this very simple device show that low-frequency signals (fm <1 kHz) as low as 1 mV can results in double-sideband levels of greater than -126 dBm for an incident RF power of less than 1 mW/cm2. The proposed device is intended to be coated with an insulating biocompatible coating and serve as a telemetry chip for chronic implantation inside the body.
AB - This paper describes a fully passive telemetry technique based on microwave backscattering. In this technique, a subharmonically-pumped passive mixer is coupled to a bio-probe and one or two miniature antennas. When interrogated by an RF excitation, this device generates an amplitude modulated RF backscattering component centered at twice the frequency of excitation. An external sensitive receiver can be used to demodulate the backscattering component and recover the bio-potential. A simple prototype based on solid state diodes has been fabricated and tested for 2.4/4.8 GHz and has the dimensions of 11.5 × 4.6 mm2 and thickness of -1 mm. Experiments with this very simple device show that low-frequency signals (fm <1 kHz) as low as 1 mV can results in double-sideband levels of greater than -126 dBm for an incident RF power of less than 1 mW/cm2. The proposed device is intended to be coated with an insulating biocompatible coating and serve as a telemetry chip for chronic implantation inside the body.
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U2 - 10.1109/iembs.2008.4649107
DO - 10.1109/iembs.2008.4649107
M3 - Conference contribution
C2 - 19162610
AN - SCOPUS:61849116678
SN - 9781424418152
T3 - Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"
SP - 129
EP - 132
BT - Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
PB - IEEE Computer Society
T2 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
Y2 - 20 August 2008 through 25 August 2008
ER -