Millimeter wave I-Q standoff biosensor

Shaolin Liao*, Sasan Bakhtiari, Thomas Elmer, Apostolos C. Raptis, Ilya V. Mikhelson, Alan V. Sahakian

*Corresponding author for this work

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

Abstract

A continuous wave (CW) 94-GHz millimeter wave (mmW) standoff biosensor has been developed for remote biometric sensing applications. The sensor measures the demodulated in-phase (I) and quadrature-phase (Q) components of the received reflected mmW signal from a subject. Both amplitude and phase of the reflected signal are obtained from downconverted I and Q channels from the quadrature mixer. The mmW sensor can faithfully monitor human vital signs (heartbeat and respiration) at relatively long standoff distances. Principle Component Analysis (PCA) is used to extract the heartbeat, the respiration and the body motion signals. The approach allows one to deduce information about amplitude and beat-to-beat rate of the respiration and the heartbeat. Experimental results collected from a subject were analyzed and compared to the signal obtained with a three-electrode ECG monitoring instrument.

Original languageEnglish (US)
Title of host publicationSensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX
DOIs
StatePublished - Jul 23 2012
EventSensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX - Baltimore, MD, United States
Duration: Apr 23 2012Apr 25 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8371
ISSN (Print)0277-786X

Other

OtherSensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX
CountryUnited States
CityBaltimore, MD
Period4/23/124/25/12

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Keywords

  • CW
  • ECG
  • Millimeter wave
  • PCA
  • Quadrature mixer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Liao, S., Bakhtiari, S., Elmer, T., Raptis, A. C., Mikhelson, I. V., & Sahakian, A. V. (2012). Millimeter wave I-Q standoff biosensor. In Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX [83711D] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8371). https://doi.org/10.1117/12.924241