Glove-Integrated Textile Antenna with Reduced SAR for Wearable UHF RFID Reader
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
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Glove-Integrated Textile Antenna with Reduced SAR for Wearable UHF RFID Reader. / Ahmed, Shahbaz; Mehmood, Adnan; Sydänheimo, Lauri; Ukkonen, Leena; Björninen, Toni.
2019 IEEE International Conference on RFID Technology and Applications (RFID-TA). IEEE, 2019. p. 231-235.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
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TY - GEN
T1 - Glove-Integrated Textile Antenna with Reduced SAR for Wearable UHF RFID Reader
AU - Ahmed, Shahbaz
AU - Mehmood, Adnan
AU - Sydänheimo, Lauri
AU - Ukkonen, Leena
AU - Björninen, Toni
PY - 2019/11/7
Y1 - 2019/11/7
N2 - We present a wearable slotted patch antenna embedded in a glove for wearable UHF RFID reader. The antenna is fully-textile based, small enough to fit on the area in the back of the hand and achieves the realized gain of –1.3 dBi at 866 MHz in body-worn configuration. The paper outlines the numerical optimization of the antenna using a layered hand model and assessment of the specific absorption rate to determine the maximum output power of the reader that complies with the SAR safety limits. As a novel feature, we have designed an isolator layer of conductive textile that is adhered inside the glove underneath the antenna to achieve 10 percent reduction in the specific absorption rate (SAR) and 1.14 dBi improvement in the realized gain compared to our earlier work. With these marked improvements, the output power of the reader is not limited by SAR, but by the regular RFID emission limit. In the wireless testing, we have verified a detection range of 4.7 meters for a regular dipole type RFID tag with 3.19 WEIRP.
AB - We present a wearable slotted patch antenna embedded in a glove for wearable UHF RFID reader. The antenna is fully-textile based, small enough to fit on the area in the back of the hand and achieves the realized gain of –1.3 dBi at 866 MHz in body-worn configuration. The paper outlines the numerical optimization of the antenna using a layered hand model and assessment of the specific absorption rate to determine the maximum output power of the reader that complies with the SAR safety limits. As a novel feature, we have designed an isolator layer of conductive textile that is adhered inside the glove underneath the antenna to achieve 10 percent reduction in the specific absorption rate (SAR) and 1.14 dBi improvement in the realized gain compared to our earlier work. With these marked improvements, the output power of the reader is not limited by SAR, but by the regular RFID emission limit. In the wireless testing, we have verified a detection range of 4.7 meters for a regular dipole type RFID tag with 3.19 WEIRP.
KW - slotted patch antenna
KW - RFID reader antenna
KW - UHF
KW - wearable antenna
KW - work glove application
KW - e-textile
U2 - 10.1109/RFID-TA.2019.8892251
DO - 10.1109/RFID-TA.2019.8892251
M3 - Conference contribution
SN - 978-1-7281-0590-1
SP - 231
EP - 235
BT - 2019 IEEE International Conference on RFID Technology and Applications (RFID-TA)
PB - IEEE
ER -