Design of Antenna-Based Sensor for Sweat Sensing

• Published in: IEEE Symposium on Wireless Technology and Applications, ISWTA
• Main Author: Mozi A.M.; Razali A.R.; Rahman N.H.A.; Azemi S.N.; Faudzi N.M.; Ibrahim A.
• Format: Conference paper
• Language: English
• Published: IEEE Computer Society 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85203846547&doi=10.1109%2fISWTA62130.2024.10651894&partnerID=40&md5=ca3a1c8638dd5e42a5e01ba002e92a66

This paper presents a non-invasive sweat-sensing antenna-based sensor operating at frequency of 2.4 GHz. The antenna-based sensor is designed with coplanar waveguide (CPW) that incorporates a reflector at the bottom layer. It has a compact size of 30 mm x 30 mm and utilizes filter paper as its substrate. The design and performance of the CPW antenna-based sensor for detecting artificial sweat solution are investigated. Results indicate the CPW antenna-based sensor achieves high sensitivity towards sweat-sensing. This is obtained through significant percentage of shift in resonant frequency with the increased in sweat volume. The maximum simulated frequency shift is 1.79 GHz at -10dB return loss that is achieved when the CPW antenna-based sensor is fully immersed in sweat. © 2024 IEEE.