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Wearable Quarter-Wave Folded Microstrip Antenna for Passive UHF RFID Applications
Joint Authors
Zhou, Ming
Fumeaux, Christophe
Kaufmann, Thomas
Ranasinghe, Damith C.
Source
International Journal of Antennas and Propagation
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-07-08
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Kaufmann, Thomas& Ranasinghe, Damith C.& Zhou, Ming& Fumeaux, Christophe. 2013. Wearable Quarter-Wave Folded Microstrip Antenna for Passive UHF RFID Applications. International Journal of Antennas and Propagation،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-448043
Modern Language Association (MLA)
Kaufmann, Thomas…[et al.]. Wearable Quarter-Wave Folded Microstrip Antenna for Passive UHF RFID Applications. International Journal of Antennas and Propagation No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-448043
American Medical Association (AMA)
Kaufmann, Thomas& Ranasinghe, Damith C.& Zhou, Ming& Fumeaux, Christophe. Wearable Quarter-Wave Folded Microstrip Antenna for Passive UHF RFID Applications. International Journal of Antennas and Propagation. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-448043
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-448043