ECTI TRANSACTIONS ON COMPUTER INFORMATION TECHNOLOGYVolume 15, No. 03, Month DECEMBER, Year 2021, Pages 289 - 302
Design, simulation, fabrication and evaluation of a textile pifa for wearable iot application
Hadi Aliakbarian, Azadeh Hajiahmadi, Nordiana Mohamad Saaid, Ping Jack Soh
Abstract Download PDFThe ever increasing use of body-worn systems in the Internet of Things application such as needs better antenna subsystem designs compatible with its requirements. Several challenges limiting the performance of a body-worn system, from materials, and environmental conditions to the effects of on body application and its hazards are discussed. As a test case, a flexible textile planar inverted-F antenna is presented and discussed. The choice of this topology is due to its simplicity in design and fabrication, relatively broad bandwidth and the presence of a rear ground plane, which minimizes the impacts of the human body on the antenna performance. It is designed on a felt substrate, whereas Aaronia-shield conductive textile is utilized as its conductive parts (radiator, shorting wall and ground plane). The antenna performance are studied in two cases, first in free space and then in bent conditions in the close proximity to the human body. The influence of the relative humidity on the textile antenna performance is also investigated numerically. Simulated and measured results indicated good agreements. Finally, the proposed antenna is integrated with a transceiver module and evaluated on the body in practice. Its wireless link quality is assessed in an indoor laboratory.
Wearable Antenna, Textile Antenna, Planar Inverted-F Antenna, Humidity Eect, Speci c Absorption Rate, Wireless Link Evaluation