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Ultra-thin EBG backed flexible antenna for 24 GHz ISM band WBAN

Ali, Mubasher, Batchelor, John C., Ullah, Irfan, Gomes, Nathan J. (2022) Ultra-thin EBG backed flexible antenna for 24 GHz ISM band WBAN. In: 2022 Antenna Measurement Techniques Association Symposium (AMTA). . IEEE ISBN 978-1-66548-427-5. E-ISBN 978-1-73623-514-0. (doi:10.23919/AMTA55213.2022.9954953) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:99468)

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An ultra-thin electromagnetic bandgap (EBG) backed antenna is presented for 24 GHz ISM band wearable applications. The antenna is a slotted bow-tie, with an overall dimension of 0.91 x 0.8 x 0.01 lamdba_0, backed by a 5 x 5 element 0.01 lambda_0 thick EBG structure: it is manufactured on a flexible substrate (relative permittivity = 2.2). The performance of the EBG-backed antenna in terms of reflection coefficient and free-space radiation patterns is investigated in scenarios with and without structural bending. It is shown that the integration of the EBG enhances the antenna's front-lobe gain by 2.6dB, decreases back-lobe radiation by 12.2dB, and decreases the specific absorption rate (SAR (1g)) from > 28 W/kg to < 1.93 W/kg, significantly reducing potential harm to the human body. Furthermore, the results show the performance of the EBG-backed antenna is highly insensitive to body proximity, and that its performance is preserved when bent along either axis.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.23919/AMTA55213.2022.9954953
Additional information: "© 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works."
Uncontrolled keywords: Slot antenna, EBG, AMC, ultra-thin, 24 GHz, ISM, WBAN
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK6540 Radio > TK6570.M6 Mobile communication systems
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Engineering and Physical Sciences Research Council (
Depositing User: John Batchelor
Date Deposited: 10 Jan 2023 15:18 UTC
Last Modified: 17 Apr 2023 14:22 UTC
Resource URI: (The current URI for this page, for reference purposes)

University of Kent Author Information

Ali, Mubasher.

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Batchelor, John C..

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