Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL

Eun Gyeol Baek; Jong Gwan Yook; Byung Hyun Kim; Gi Ho Yun

doi:10.1109/RFIT52905.2021.9565237

Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL

Eun Gyeol Baek, Jong Gwan Yook, Byung Hyun Kim, Gi Ho Yun

Department of Electrical and Electronic Engineering

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

Abstract

In this paper, a nonconstrained wrist pulse sensor based on radio-frequency proximity coupling at 2.4 GHz is proposed. The proposed system consists of a voltage-controlled oscillator (VCO) combined with a planar resonator and a phase-locked loop (PLL). The resonator senses the distance variation from the skin occurring because of the wrist pulse and plays a role as a feedback element of the VCO. The oscillation frequency of the VCO varies due to the impedance variation of the resonator, and the PLL operates as a converter of the frequency variation to the DC output voltage variation. The measurement result verified that the proposed system can detect the heart rate in nonconctact and nonconstrained condition with 2 mm gap from the skin.

Original language	English
Title of host publication	2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665433914
DOIs	https://doi.org/10.1109/RFIT52905.2021.9565237
Publication status	Published - 2021 Aug 25
Event	2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021 - Hualien, Taiwan, Province of China Duration: 2021 Aug 25 → 2021 Aug 27

Publication series

Name	2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021

Conference

Conference	2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021
Country/Territory	Taiwan, Province of China
City	Hualien
Period	21/8/25 → 21/8/27

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

All Science Journal Classification (ASJC) codes

Computer Networks and Communications
Electrical and Electronic Engineering
Instrumentation

Access to Document

10.1109/RFIT52905.2021.9565237

Cite this

Baek, E. G., Yook, J. G., Kim, B. H., & Yun, G. H. (2021). Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL. In 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021 (2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RFIT52905.2021.9565237

Baek, Eun Gyeol ; Yook, Jong Gwan ; Kim, Byung Hyun et al. / Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL. 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021. Institute of Electrical and Electronics Engineers Inc., 2021. (2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021).

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title = "Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL",

abstract = "In this paper, a nonconstrained wrist pulse sensor based on radio-frequency proximity coupling at 2.4 GHz is proposed. The proposed system consists of a voltage-controlled oscillator (VCO) combined with a planar resonator and a phase-locked loop (PLL). The resonator senses the distance variation from the skin occurring because of the wrist pulse and plays a role as a feedback element of the VCO. The oscillation frequency of the VCO varies due to the impedance variation of the resonator, and the PLL operates as a converter of the frequency variation to the DC output voltage variation. The measurement result verified that the proposed system can detect the heart rate in nonconctact and nonconstrained condition with 2 mm gap from the skin.",

author = "Baek, {Eun Gyeol} and Yook, {Jong Gwan} and Kim, {Byung Hyun} and Yun, {Gi Ho}",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021 ; Conference date: 25-08-2021 Through 27-08-2021",

year = "2021",

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doi = "10.1109/RFIT52905.2021.9565237",

language = "English",

series = "2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021",

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Baek, EG, Yook, JG, Kim, BH & Yun, GH 2021, Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL. in 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021. 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021, Institute of Electrical and Electronics Engineers Inc., 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021, Hualien, Taiwan, Province of China, 21/8/25. https://doi.org/10.1109/RFIT52905.2021.9565237

Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL. / Baek, Eun Gyeol; Yook, Jong Gwan; Kim, Byung Hyun et al.
2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021. Institute of Electrical and Electronics Engineers Inc., 2021. (2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021).

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

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T1 - Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL

AU - Baek, Eun Gyeol

AU - Yook, Jong Gwan

AU - Kim, Byung Hyun

AU - Yun, Gi Ho

PY - 2021/8/25

Y1 - 2021/8/25

N2 - In this paper, a nonconstrained wrist pulse sensor based on radio-frequency proximity coupling at 2.4 GHz is proposed. The proposed system consists of a voltage-controlled oscillator (VCO) combined with a planar resonator and a phase-locked loop (PLL). The resonator senses the distance variation from the skin occurring because of the wrist pulse and plays a role as a feedback element of the VCO. The oscillation frequency of the VCO varies due to the impedance variation of the resonator, and the PLL operates as a converter of the frequency variation to the DC output voltage variation. The measurement result verified that the proposed system can detect the heart rate in nonconctact and nonconstrained condition with 2 mm gap from the skin.

AB - In this paper, a nonconstrained wrist pulse sensor based on radio-frequency proximity coupling at 2.4 GHz is proposed. The proposed system consists of a voltage-controlled oscillator (VCO) combined with a planar resonator and a phase-locked loop (PLL). The resonator senses the distance variation from the skin occurring because of the wrist pulse and plays a role as a feedback element of the VCO. The oscillation frequency of the VCO varies due to the impedance variation of the resonator, and the PLL operates as a converter of the frequency variation to the DC output voltage variation. The measurement result verified that the proposed system can detect the heart rate in nonconctact and nonconstrained condition with 2 mm gap from the skin.

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M3 - Conference contribution

AN - SCOPUS:85118145133

T3 - 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021

BT - 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021

PB - Institute of Electrical and Electronics Engineers Inc.

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Baek EG, Yook JG, Kim BH, Yun GH. Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL. In 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021. Institute of Electrical and Electronics Engineers Inc. 2021. (2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021). doi: 10.1109/RFIT52905.2021.9565237

Nonconstrained Wrist Pulse Detection System Based on RF Resonator and PLL

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