5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler

Sang Gyu Kim, Hyun Kim, Yongshik Lee, Il Suek Kho, Jong Gwan Yook

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

17 Citations (Scopus)

Abstract

5.8 GHz Doppler radar which is wireless sensor to collect the respiration and heart rate using feed-forward type branch-line coupler is developed. Even though the wireless sensing systems using a circulator or branch-line coupler have been developed, these systems have low sensitivity because of low isolation and bulky system due to Tx/Rx two independent signal paths. In this paper, proposed Doppler radar has improved the isolation by using feed-forward type branch-line coupler, which has -55 dB isolation between transmitter and receiver. As a result of achieving high isolation, irreversible vital signal due to the low isolation of conventional branch-line coupler can be detected. So, sensitivity of the system is increased drastically.

Original languageEnglish
Title of host publicationProceedings of the 3rd European Radar Conference, EuRAD 2006
Pages249-252
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
Event3rd European Radar Conference, EuRAD 2006 - Manchester, United Kingdom
Duration: 2006 Sep 132006 Sep 15

Other

Other3rd European Radar Conference, EuRAD 2006
CountryUnited Kingdom
CityManchester
Period06/9/1306/9/15

Fingerprint

Doppler radar
Transmitters
Sensors

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Kim, S. G., Kim, H., Lee, Y., Kho, I. S., & Yook, J. G. (2007). 5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler. In Proceedings of the 3rd European Radar Conference, EuRAD 2006 (pp. 249-252). [4058305] https://doi.org/10.1109/EURAD.2006.280321
Kim, Sang Gyu ; Kim, Hyun ; Lee, Yongshik ; Kho, Il Suek ; Yook, Jong Gwan. / 5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler. Proceedings of the 3rd European Radar Conference, EuRAD 2006. 2007. pp. 249-252
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Kim, SG, Kim, H, Lee, Y, Kho, IS & Yook, JG 2007, 5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler. in Proceedings of the 3rd European Radar Conference, EuRAD 2006., 4058305, pp. 249-252, 3rd European Radar Conference, EuRAD 2006, Manchester, United Kingdom, 06/9/13. https://doi.org/10.1109/EURAD.2006.280321

5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler. / Kim, Sang Gyu; Kim, Hyun; Lee, Yongshik; Kho, Il Suek; Yook, Jong Gwan.

Proceedings of the 3rd European Radar Conference, EuRAD 2006. 2007. p. 249-252 4058305.

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

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Kim SG, Kim H, Lee Y, Kho IS, Yook JG. 5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler. In Proceedings of the 3rd European Radar Conference, EuRAD 2006. 2007. p. 249-252. 4058305 https://doi.org/10.1109/EURAD.2006.280321