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High efficient dual band stacked antennas integrated into rescue helmets for indoor communication

Published online by Cambridge University Press:  15 February 2021

Hashinur Islam Open the ORCID record for Hashinur Islam [Opens in a new window] ,
Saumya Das Open the ORCID record for Saumya Das [Opens in a new window] ,
Tanushree Bose Open the ORCID record for Tanushree Bose [Opens in a new window]  and
Sourav Dhar
Hashinur Islam
Affiliation:
Department of Electronics and Communication Engineering, Sikkim Manipal Institute of Technology, Sikkim Manipal University, Majitar, Rangpo, Sikkim737136, India
Saumya Das*
Affiliation:
Department of Information Technology, Sikkim Manipal Institute of Technology, Sikkim Manipal University, Majitar, Rangpo, Sikkim737136, India
Tanushree Bose
Affiliation:
Department of Electronics and Communication Engineering, Sikkim Manipal Institute of Technology, Sikkim Manipal University, Majitar, Rangpo, Sikkim737136, India
Sourav Dhar
Affiliation:
Department of Electronics and Communication Engineering, Sikkim Manipal Institute of Technology, Sikkim Manipal University, Majitar, Rangpo, Sikkim737136, India
*
Author for correspondence: Saumya Das, E-mail: saumya.das.1976@gmail.com
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Abstract

A dual-band stacked antenna integrated with a rescue helmet is proposed for WLAN applications. The cross slot aperture feeding technique enables the antenna to support dual-band operation at 2.4 and 5 GHz. On the ground plane, two slots are formed, perpendicular to each other and of different lengths. Four dielectric layers of different permittivity are stacked over this cross slot to attain the desired frequency bands. Under free space condition, the radiator yields 7% (2.31–2.48 GHz), 15.87% (5.12–6 GHz) 10 dB return loss bandwidth (BW). The use of low loss dielectric layers on the slots also provides a high antenna efficiency and moderate gain at both frequency bands. The small dimension of antenna encourages its use as a wearable helmet antenna. Antenna performances are observed under wearable condition. For assessing human exposure to RF electromagnetic fields, SAR evaluations are conducted at both 2.4 and 5 GHz WLAN bands.

Keywords

Dual WLAN band antennahigh efficient antennarescue helmet antennaSAR evaluationstack antenna
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 10 , December 2021 , pp. 1103 - 1108
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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