Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2008.19.2.191

An 2.4 GHz Bio-Radar System for Non-Contact Measurement of Heart and Respiration  

Lee, Yong-Jin (Department of Electrical and Electronic Engineering, Yonsei University)
Jang, Byung-Jun (Department of Electrical Engineering, Kookmin University)
Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.2, 2008 , pp. 191-199 More about this Journal
Abstract
In this paper, we present a performance analysis and design and implementation results of a 2.4 GHz bio-radar system that can detect human heartbeat and respiration signals. In order to design a 2.4 GHz bio-radar system qualitatively, we investigate the electromagnetic properties of human tissues and calculate the target SNR of demodulation output with respect to distance. The target SNR is defined by the 90 % success ratio for detecting heartbeat signal. With this target SNR value, the performance and link budget of the bio-radar system is simulated using MATLAB. Using this link budget results, the direct conversion receiver is designed and Implemented in 4 layer printed circuit board(PCB). With output power of 0 dBm and 5 Hz bandwidth, 80 % success ratio of 50 cm is measured. Measurement results show a good agreement with simulation results.
Keywords
Biomedical Monitoring; Bio-Radar; Doppler Radar; I/Q Diversity; Path Loss; Phase Noise; Radar Cross Section;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Byung-Jun Jang, "Trend on BAN with bio-sensor for early detection", The 15th Korea Internet Conference, pp. 80-93, Jun. 2007
2 B. -K. Park, V. M. Lubecke, and O. Boric-Lubecke, "Arctangent demodulation with DC offset compensation in quadrature doppler radar receiver systems", IEEE Trans. Microwave Theory and Techniques, vol. 55, no. 5, May 2007
3 B. Lohman, O. Boric-Lubecke, V. M. Lubecke, P. W. Ong, and M. M. Sondhi, "A digital signal processor for Doppler radar sensing of vital signs", Proc. IEEE 23rd Annual Engineering in Medicine and Biology Society Conf., vol. 4, pp. 3359-3362, 2001
4 A. D. Droitcour, O. Boric-Lubecke, V. M. Lubecke, J. Lin, and G. T. A. Kovac, "Range correlation and I/Q performance benefits in single-chip silicon doppler radars for non-contact cardiopulmonary monitoring", IEEE Trans. Microwave Theory Tech., vol. 52, pp. 838-848, Mar. 2004   DOI   ScienceOn
5 M, Isar, B.-K. Park, V. M. Lubecke, O. Boric- Lubecke, Host-Madsen, and Anders Sizzer, "Sensor nodes for Doppler radar measurements of life signs", Microwave Symposium, 2007. IEEE/MTT-S International, pp. 1241-1244, Jun. 2007
6 J. C. Lin, "Non-invasive microwave measurement of respiration", Proceedings of the IEEE, vol. 63, no. 10, p. 1530, 1975   DOI   ScienceOn
7 C. Gabriel, "Compilation of the dielectric properties of body tissues at RF and microwave frequencies", http://niremf.ifac.cnr.it/
8 A. Droitcour, "Non-contact measurement of heart and rspiration rates with a single-chip microwave doppler radar", Ph. D. thesis, Standford University, Jun. 2006
9 이용진, 장병준, 육종관, "호흡 및 심박수 측정을 위한 비접촉 방식의 2.4 GHz 바이오 레이더 시스템", 2007년도 한국전자파학회 종합학술발표회논문집, 17(1), pp. 267-3270, 2007년 11월
10 S. Dragan, B. -K. Park, O. Boric-Lubecke, V. M. Lubecke, Host-Madsen, Anders Sizer, and Theodore, "Experimental evaluation of multiple antenna techniques for remote sensing of physiological motion", Microwave Symposium, 2007. IEEE/MTT-S International, pp. 1735-1738, Jun. 2007