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

doi:10.1109/EURAD.2006.280321

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

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Proceedings of the 3rd European Radar Conference, EuRAD 2006
Publisher	IEEE Computer Society
Pages	249-252
Number of pages	4
ISBN (Print)	2960055179, 9782960055177
DOIs	https://doi.org/10.1109/EURAD.2006.280321
Publication status	Published - 2006 Jan 1
Event	3rd European Radar Conference, EuRAD 2006 - Manchester, United Kingdom Duration: 2006 Sept 13 → 2006 Sept 15

Publication series

Name	Proceedings of the 3rd European Radar Conference, EuRAD 2006

Other

Other	3rd European Radar Conference, EuRAD 2006
Country/Territory	United Kingdom
City	Manchester
Period	06/9/13 → 06/9/15

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Access to Document

10.1109/EURAD.2006.280321

Cite this

Kim, S. G., Kim, H., Lee, Y., Kho, I. S., & Yook, J. G. (2006). 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). Article 4058305 (Proceedings of the 3rd European Radar Conference, EuRAD 2006). IEEE Computer Society. https://doi.org/10.1109/EURAD.2006.280321

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title = "5.8 GHz vital signal sensing Doppler radar using isolation-improved branch-line coupler",

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.",

author = "Kim, {Sang Gyu} and Hyun Kim and Yongshik Lee and Kho, {Il Suek} and Yook, {Jong Gwan}",

year = "2006",

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doi = "10.1109/EURAD.2006.280321",

language = "English",

isbn = "2960055179",

series = "Proceedings of the 3rd European Radar Conference, EuRAD 2006",

publisher = "IEEE Computer Society",

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note = "3rd European Radar Conference, EuRAD 2006 ; Conference date: 13-09-2006 Through 15-09-2006",

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Kim, SG, Kim, H, Lee, Y, Kho, IS & Yook, JG 2006, 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, Proceedings of the 3rd European Radar Conference, EuRAD 2006, IEEE Computer Society, 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 et al.
Proceedings of the 3rd European Radar Conference, EuRAD 2006. IEEE Computer Society, 2006. p. 249-252 4058305 (Proceedings of the 3rd European Radar Conference, EuRAD 2006).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - 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.

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

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