@inproceedings{4c4f6f21287b4ad2ba73b046bab9565b,
title = "Chest-worn self-injection-locked oscillator tag for monitoring heart rate variability",
abstract = "This paper presents a 5.8 GHz wireless chest-worn sensor for monitoring heart rate variability (HRV). The sensor consists of a self-injection-locked oscillator (SILO) and a tag antenna. It transmits a radio-frequency (RF) signal that is frequency-modulated based on self-injection-locking by the physiological motion of the chest to a handheld receiver for demodulation to analyze HRV. The tag antenna is a stacked structure composed of a complementary slot ring resonator (CSRR) and a circularly polarized (CP) slot radiator, playing important roles as a near-field sensing tip and a far-field radiation antenna. As an experimental result, the comparison of the inter-beat interval (IBI) data between the proposed sensor system and an electrocardiogram (ECG) equipment for a wearer shows excellent agreement.",
keywords = "Complementary slot ring resonator, Heart rate variability, Self-injection-locking, Wearable sensor",
author = "Arif, {Rezki El} and Su, {Wei Chih} and Tang, {Mu Cyun} and Horng, {Tzyy Sheng} and Wang, {Fu Kang}",
note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 ; Conference date: 04-08-2020 Through 06-08-2020",
year = "2020",
month = aug,
doi = "10.1109/IMS30576.2020.9223983",
language = "English",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "512--515",
booktitle = "IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium",
address = "United States",
}