Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation

Sang Gyu Kim, Gi Ho Yoon, Jong Gwan Yook

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

1 Citation (Scopus)

Abstract

In this paper, a 2.4 GHz wireless vital signal sensor is proposed to detect heartbeat and respiration signals. The oscillator circuit incorporates with the planar resonator, which functions as a parallel feedback element as well as a near-field radiator. The periodic movement of a body by respiration exercise could cause the input impedance variation of the radiator within near-field range. This variation results in corresponding deviation in the oscillation frequency and it has been utilized for sensing of vital signals. In addition, a SAW filter and power detector have been used to transform the frequency variation into voltage waveform. Also, the relation of the frequency deviation of oscillator and the Q value of resonator is analyzed to increase the system sensitivity. As a result, the experimental results show that the proposed sensor placed 10 mm away from a human body can detect the vital signals very accurately.

Original languageEnglish
Title of host publicationAsia-Pacific Microwave Conference Proceedings, APMC 2011
Pages1586-1589
Number of pages4
Publication statusPublished - 2011 Dec 1
EventAsia-Pacific Microwave Conference, APMC 2011 - Melbourne, VIC, Australia
Duration: 2011 Dec 52011 Dec 8

Other

OtherAsia-Pacific Microwave Conference, APMC 2011
CountryAustralia
CityMelbourne, VIC
Period11/12/511/12/8

Fingerprint

Radiators
Resonators
Sensors
Detectors
Feedback
Networks (circuits)
Electric potential

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Kim, S. G., Yoon, G. H., & Yook, J. G. (2011). Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation. In Asia-Pacific Microwave Conference Proceedings, APMC 2011 (pp. 1586-1589). [6174069]
Kim, Sang Gyu ; Yoon, Gi Ho ; Yook, Jong Gwan. / Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation. Asia-Pacific Microwave Conference Proceedings, APMC 2011. 2011. pp. 1586-1589
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Kim, SG, Yoon, GH & Yook, JG 2011, Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation. in Asia-Pacific Microwave Conference Proceedings, APMC 2011., 6174069, pp. 1586-1589, Asia-Pacific Microwave Conference, APMC 2011, Melbourne, VIC, Australia, 11/12/5.

Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation. / Kim, Sang Gyu; Yoon, Gi Ho; Yook, Jong Gwan.

Asia-Pacific Microwave Conference Proceedings, APMC 2011. 2011. p. 1586-1589 6174069.

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

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Kim SG, Yoon GH, Yook JG. Sensitivity enhanced noncontact vital signal sensor using oscillation frequency deviation. In Asia-Pacific Microwave Conference Proceedings, APMC 2011. 2011. p. 1586-1589. 6174069