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A high FBR low SAR and AMC-backed compact wearable antenna array for WBAN applications

Published online by Cambridge University Press:  20 November 2024

Jun Chu ,
Chengzhu Du Open the ORCID record for Chengzhu Du [Opens in a new window]  and
Haifeng Shu
Jun Chu
Affiliation:
School of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai, People’s Republic of China
Chengzhu Du*
Affiliation:
School of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai, People’s Republic of China
Haifeng Shu
Affiliation:
School of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai, People’s Republic of China
*
Corresponding author: Chengzhu Du; Email: [email protected]
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Abstract

In this paper, a wearable antenna array based on a 9 × 3 artificial magnetic conductor (AMC) array is proposed with the characteristics of compact, low profile, low specific absorption rate (SAR), high front-to-back ratio (FBR) and high gain for wireless body area network (WBAN) bands. The proposed wearable antenna consists of a four-element array and an AMC array. The size of antenna array loaded AMC is 137.7 × 45.9 mm2. The dielectric substrate of the antenna and the AMC structure are made of 0.1 mm liquid crystal polymer material, which is flexible and low profiled. The antenna operates from 5.62 to 6 GHz after the AMC structure is loaded. The gain increases by 3.23 dB, reaching 12.03 dB at 5.8 GHz. And the FBR value is raised by 26.04 dB. The highest SAR value of the simulated antenna on the human model is 0.0496 W/kg, far less than the US federal or EU requirements. After constructing and testing the antenna, the outcomes of the tests agreed with the results of the simulation. The flexible antenna array with AMC structure has good prospect in WBAN applications.

Keywords

antenna arrayartificial magnetic conductor (AMC)high front-to-back ratio (FBR)low specific absorption rate (SAR)WBANwearable antenna
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 9 , November 2024 , pp. 1499 - 1509
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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