TY - GEN
T1 - Latex based near-endfire wearable antenna backed by AMC surface
AU - Agarwal, Kush
AU - Guo, Yong-Xin
AU - Salam, Budiman
AU - Albert, Lu Chee Wai
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2013
Y1 - 2013
N2 - A near-endfire, artificial magnetic conductor (AMC) backed wearable antenna is proposed in this paper for wireless body area networks operating in the 2.4 GHz ISM band. The bidirectional-endfire radiation pattern of Yagi-Uda latex antenna is changed to off-axis near-endfire radiation using an AMC reflector also printed on latex. The antenna is separated from upper AMC surface using flexible Styrofoam of thickness 0.044λo at 2.4 GHz for best compromise between keeping the antenna structure low-profile and achieving an off-axis beam tilt radiation of 74° towards end-fire direction. 0° reflection phase AMC surface is proposed to reduce downward radiations and consequently improve the antenna tolerance to positioning on the human body, and reduce the specific absorption rate (SAR) level for 2.4 GHz frequency band gap. Antenna performance in terms of return loss, radiation efficiency, extent of frequency detuning, gain and SAR level are studied for free space as well as CST MWS tissue-equivalent voxel model for proposed antenna design. The Yagi-Uda antenna backed with AMC reflector demonstrates the measured return loss bandwidth of 40 MHz (2.43-2.47 GHz) and gain of -0.2 dBi in endfire direction with improved on-body radiation efficiency of 74.82 % and reduced peak SAR level of 1.24 W/kg for 10 g tissue for the compact overall flexible latex antenna volume of 0.4λo × 0.4λo × 0.076λo at 2.4 GHz. © 2013 IEEE.
AB - A near-endfire, artificial magnetic conductor (AMC) backed wearable antenna is proposed in this paper for wireless body area networks operating in the 2.4 GHz ISM band. The bidirectional-endfire radiation pattern of Yagi-Uda latex antenna is changed to off-axis near-endfire radiation using an AMC reflector also printed on latex. The antenna is separated from upper AMC surface using flexible Styrofoam of thickness 0.044λo at 2.4 GHz for best compromise between keeping the antenna structure low-profile and achieving an off-axis beam tilt radiation of 74° towards end-fire direction. 0° reflection phase AMC surface is proposed to reduce downward radiations and consequently improve the antenna tolerance to positioning on the human body, and reduce the specific absorption rate (SAR) level for 2.4 GHz frequency band gap. Antenna performance in terms of return loss, radiation efficiency, extent of frequency detuning, gain and SAR level are studied for free space as well as CST MWS tissue-equivalent voxel model for proposed antenna design. The Yagi-Uda antenna backed with AMC reflector demonstrates the measured return loss bandwidth of 40 MHz (2.43-2.47 GHz) and gain of -0.2 dBi in endfire direction with improved on-body radiation efficiency of 74.82 % and reduced peak SAR level of 1.24 W/kg for 10 g tissue for the compact overall flexible latex antenna volume of 0.4λo × 0.4λo × 0.076λo at 2.4 GHz. © 2013 IEEE.
KW - Artificial magnetic conductor reflector
KW - body-worn antennas
KW - endfire radiation
KW - on-body communications
KW - specific absorption rate
KW - voxel model
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U2 - 10.1109/IMWS-BIO.2013.6756195
DO - 10.1109/IMWS-BIO.2013.6756195
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781467360951
T3 - 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings
BT - 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings
PB - IEEE Computer Society
T2 - 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Tecbhnologies for Biomedical and Healthcare Applications, IMWS-BIO 2013
Y2 - 9 December 2013 through 11 December 2013
ER -