Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/79965
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Type: | Journal article |
Title: | Wearable Quarter-Wave Folded Microstrip Antenna for Passive UHF RFID Applications |
Author: | Kaufmann, T. Ranasinghe, D. Zhou, M. Fumeaux, C. |
Citation: | International Journal of Antennas and Propagation, 2013; 2013:1-11 |
Publisher: | Hindawi Publishing Corporation |
Issue Date: | 2013 |
ISSN: | 1687-5869 1687-5877 |
Statement of Responsibility: | Thomas Kaufmann, Damith C. Ranasinghe, Ming Zhou, and Christophe Fumeaux |
Abstract: | A wearable low-profile inset-fed quarter-wave folded microstrip patch antenna for noninvasive activity monitoring of elderly is presented. The proposed antenna is embedded with a sensor-enabled passive radio-frequency identification (RFID) tag operating in the ultra-high frequency (UHF) industrial-scientific-medical (ISM) band around 900 MHz. The device exhibits a low and narrow profile based on a planar folded quarter-wave length patch structure and is integrated on a flexible substrate to maximise comfort to the wearer. An extended ground plane made from silver fabric successfully minimises the impact of the human body on the antenna performance. Measurements on a prototype demonstrate a reflection coefficient (S₁₁) of −30 dB at resonance and a −10 dB bandwidth from 920 MHz to 926 MHz. Simulation results predict a maximum gain of 2.8 dBi. This is confirmed by tag measurements where a 4-meter read range is achieved using a transmit power of 30 dBm, for the case where the passive wearable tag antenna is mounted on a body in a practical setting. This represents an almost 40% increase in read range over an existing dipole antenna placed over a 10 mm isolator layer on a human subject. |
Rights: | Copyright © 2013 Thomas Kaufmann et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
DOI: | 10.1155/2013/129839 |
Grant ID: | http://purl.org/au-research/grants/arc/DP130104614 http://purl.org/au-research/grants/arc/DP120100661 |
Published version: | http://dx.doi.org/10.1155/2013/129839 |
Appears in Collections: | Aurora harvest 4 Electrical and Electronic Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_79965.pdf | Published version | 3.96 MB | Adobe PDF | View/Open |
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