Open AccessElectromagnetic interference of wireless power transfer system on wearable electrocardiogram
Author(s) -
Liao Wei,
Shi Jingjing,
Wang Jianqing
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0119
Subject(s) - wearable computer , emi , wireless , electromagnetic interference , wireless power transfer , body area network , electrical engineering , wearable technology , interference (communication) , electronic engineering , computer science , engineering , telecommunications , embedded system , channel (broadcasting)
The increasing ageing population is leading to a wide‐scale demand for health‐state monitoring by a wireless body area network (BAN). Wireless BAN needs each vital sensor to act as a wearable device for collecting blood pressure, electrocardiogram (ECG), electroencephalogram and so on in daily life. On the other hand, wireless power transfer is also getting into our daily life because of its convenience, which suggests a potential electromagnetic interference (EMI) problem on the wearable devices in healthcare and medical BAN. In this study, the authors quantitatively evaluated the EMI on wearable ECG for 6.8 MHz wireless power transfer system. They employed electromagnetic field analysis technique to derive the common‐mode voltage between the human body with a wearable ECG and the ground plane, and circuit simulation or measurement to derive the interference voltage at the wearable ECG output. The result first time gave a quantitative evaluation for EMI of wireless power transfer on wearable ECG. The approach is also available to be applied to EMI evaluation of other wearable devices in healthcare or medical applications.