Wrist pulse detection system based on changes in the near-field reflection coefficient of a resonator

Yong Jun An; Gi Ho Yun; Sung Woo Kim; Jong Gwan Yook

doi:10.1109/LMWC.2014.2340584

Wrist pulse detection system based on changes in the near-field reflection coefficient of a resonator

Yong Jun An, Gi Ho Yun, Sung Woo Kim, Jong Gwan Yook

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

This letter presents a wrist pulse sensor based on reflection coefficient (S₁₁) from a resonator which is applicable to existing wearable communication devices. The compact resonator is designed on flexible substrate as an RF signal radiator. Since the reflection coefficient from the resonator depends on the distance between the resonator and the wall of the major artery, slight changes in radial artery diameter can be utilized to obtain pulse rate at the wrist. The sensor system is implemented and tested at 2.4 GHz ISM band, and reveals excellent performance in terms of sensitivity as well as convenience as a wearable device compared to conventional piezoelectric or photoplethysmography (PPG) sensor.

Original language	English
Article number	6884867
Pages (from-to)	719-721
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	24
Issue number	10
DOIs	https://doi.org/10.1109/LMWC.2014.2340584
Publication status	Published - 2014 Oct 1

Bibliographical note

Publisher Copyright:
© 2001-2012 IEEE.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2014.2340584

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abstract = "This letter presents a wrist pulse sensor based on reflection coefficient (S11) from a resonator which is applicable to existing wearable communication devices. The compact resonator is designed on flexible substrate as an RF signal radiator. Since the reflection coefficient from the resonator depends on the distance between the resonator and the wall of the major artery, slight changes in radial artery diameter can be utilized to obtain pulse rate at the wrist. The sensor system is implemented and tested at 2.4 GHz ISM band, and reveals excellent performance in terms of sensitivity as well as convenience as a wearable device compared to conventional piezoelectric or photoplethysmography (PPG) sensor.",

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Wrist pulse detection system based on changes in the near-field reflection coefficient of a resonator

Abstract

Bibliographical note

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