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SAR analysis of tri-band antennas for a 5G eyewear device

Published online by Cambridge University Press:  16 March 2020

M. Dilruba Geyikoğlu Open the ORCID record for M. Dilruba Geyikoğlu [Opens in a new window] ,
Hilal Koç Polat ,
Fatih Kaburcuk  and
Bülent Çavuşoğlu
M. Dilruba Geyikoğlu*
Affiliation:
Electrical and Electronics Engineering, Ataturk University, Erzurum, Turkey
Hilal Koç Polat
Affiliation:
Electrical and Electronics Engineering, Erzurum Technical University, Erzurum, Turkey
Fatih Kaburcuk
Affiliation:
Electrical and Electronics Engineering, Cumhuriyet University, Sivas, Turkey
Bülent Çavuşoğlu
Affiliation:
Electrical and Electronics Engineering, Ataturk University, Erzurum, Turkey
*
Author for correspondence: M. Dilruba Geyikoğlu, E-mail: dilruba.mdk@gmail.com
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Abstract

The goal of this study is to analyze the specific absorption rate (SAR) distribution of the projected 5G frequencies below 6 GHz and at Wi-Fi frequency (2.45 GHz) on a human head, for eyewear device applications. Two separate tri-band printed dipole antennas for this purpose are designed and fabricated at operating frequencies of 2.45/3.8/6 GHz for prototype-1 and at operating frequencies of 2.45/3.6/4.56 GHz for prototype-2. In order to obtain the desired frequencies: first, the prototypes of the proposed antennas are fine-tuned via Computer Simulation Technology Microwave Studio (CST) and then fabricated on the FR4 layer. The reflection coefficient (S11) is tested and the simulation results are confirmed. In order to analyze the effect of wearing a pair of glasses' frame including a tri-band 5G antenna, a frame is designed and produced via 3D printer with polylactic acid material which has high dielectric constant (ɛr = 8.1). The SAR results of the proposed antennas have been examined for the cases where the antenna is embedded in the frame and is used alone. Both cases were analyzed by using the homogeneous specific anthropomorphic mannequin and the heterogeneous visible human head phantoms and the results have been evaluated in terms of SAR10 g values.

Keywords

5GSpecific Absorption RateEyewear DeviceMultiband
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Special Issue 8: Special Issue EuMW 2019. Part II , October 2020 , pp. 754 - 761
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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