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Design and performance analysis of dual-band wearable compact low-profile antenna for body-centric wireless communications

Published online by Cambridge University Press:  11 July 2018

Abdullah Al-Sehemi ,
Ahmed Al-Ghamdi ,
Nikolay Dishovsky ,
Nikolay Atanasov Open the ORCID record for Nikolay Atanasov [Opens in a new window]  and
Gabriela Atanasova
Abdullah Al-Sehemi
Affiliation:
Research Center for Advanced Materials Science, King Khalid University, Abha 61413, P. O. Box 9004, Saudi Arabia Department of Chemistry, College of Science, King Khalid University, Abha 61413, P. O. Box 9004, Saudi Arabia
Ahmed Al-Ghamdi
Affiliation:
Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
Nikolay Dishovsky
Affiliation:
Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria
Nikolay Atanasov*
Affiliation:
Department of Telecommunications, Faculty of Telecommunications and Management, University of Telecommunications and Post, 1700 Sofia, Bulgaria Department of Communication and Computer Engineering, Faculty of Engineering, South-West University ‘Neofit Rilski’, 2400 Blagoevgrad, Bulgaria
Gabriela Atanasova
Affiliation:
Department of Telecommunications, Faculty of Telecommunications and Management, University of Telecommunications and Post, 1700 Sofia, Bulgaria Department of Communication and Computer Engineering, Faculty of Engineering, South-West University ‘Neofit Rilski’, 2400 Blagoevgrad, Bulgaria
*
Author for correspondence: Nikolay Atanasov, E-mail: [email protected]
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Abstract

In this paper, we present a novel dual-band wearable compact flexible antenna for body-centric wireless communications (BCWCs). The design is based on a modified planar dipole with parasitic elements, meandered lines, and a rectangular reflector embedded into a hydrophobic rubber-textile multilayer substrate in order to get both good antenna performance and mechanical properties. The antenna's structure is analyzed and optimized in free space (FS), on a numerical and an experimental homogeneous flat phantom. The overall dimensions of the antenna are 50 mm × 40 mm × 4.6 mm and a prototype mass of 11 g, which makes it suitable for practical applications in BCWCs. The built prototype resonated at 2.47 GHz with a |S11|−26.90 dB and at 5.42 GHz with a |S11|−24.60 dB in the FS. The measured bandwidths are 500 MHz (2.2–2.7 GHz) and 1000 MHz (4.65–5.75 GHz) at lower and higher bands, respectively. The antenna exhibits a measured maximum gain of 1.17 dBi at 2.66 GHz and a radiation efficiency of 28.44% in FS. The 10 g average maximum specific absorption rate is 0.165 W/kg at 2.70 GHz and 0.520 W/kg at 5.24 GHz when the antenna is placed on the numerical phantom at net input power 0.1 W.

Keywords

Antenna designbody-centric wireless communicationsmicrowave measurementsmodeling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 10 , December 2018 , pp. 1175 - 1185
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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