Antenna evaluation of a non-contact vital signs sensor for continuous heart and respiration rate monitoring

Vighneshrudra Das, Alex Boothby, Royce Hwang, Tam Nguyen, Jerry Lopez, Donald Y.C. Lie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

20 Scopus citations

Abstract

A portable non-contact vital signs sensor system that is capable of continuously monitoring heart and respiration rates is presented. The system operates based on the continuous wave (CW) Doppler radar principle and has been evaluated using several antenna types: patch, Yagi, log-periodic and helical. The sensor operates at 2.4 GHz, realized on a custom designed low-cost PCB that integrates both the RF receiver (Rx) and transmitter (Tx) sections with analog electronics. It uses a quadrature receiver architecture with separate Tx and Rx antennas. The sensor using our custom designed helical antenna performs best among all antennas tested here. The sensor system can achieve a 1 beat/min error versus the reference heartbeat signal for 75% of the continuous monitoring time, while the accuracy for the respiration rate is within 1 breath/min for 95% of the time.

Original languageEnglish
Title of host publicationRWW 2012 - Proceedings
Subtitle of host publication2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems, BioWireleSS 2012
Pages13-16
Number of pages4
DOIs
StatePublished - 2012
Event2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems, BioWireleSS 2012 - Santa Clara, CA, United States
Duration: Jan 15 2012Jan 18 2012

Publication series

NameRWW 2012 - Proceedings: 2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems, BioWireleSS 2012

Conference

Conference2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems, BioWireleSS 2012
Country/TerritoryUnited States
CitySanta Clara, CA
Period01/15/1201/18/12

Keywords

  • Doppler radar
  • Yagi antenna
  • arctangent demodulation
  • helical antenna
  • log-periodic antenna
  • noncontact vital signs monitoring
  • patch antenna
  • quadrature receiver
  • wireless continuous monitoring

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