A Tightly Integrated Multilayer Battery Antenna for RFID Epidermal Applications

Caccami, Maria Cristina and Hogan, Matteo P. and Alfredsson, Maria and Marrocco, Gaetano and Batchelor, John C. (2017) A Tightly Integrated Multilayer Battery Antenna for RFID Epidermal Applications. IEEE Transactions on Antennas and Propagation, 66 (2). pp. 609-617. ISSN 0018-926X. E-ISSN 1558-2221. (doi:https://doi.org/10.1109/TAP.2017.2780899) (Full text available)

Abstract

For the acceptance 1 of biointegrated devices in daily life, radio systems must be developed, which are minimally invasive to the skin, and they must have ultralow-profile local power sources to support data-logging functionality without compromising shape conformability. This contribution proposes a tightly integrated multilayer battery-antenna system (65 × 23 mm2), that is, ultrathin (just 200 μm), flexible, and lighter than 1 g, making it suitable for epidermal applications. The negative electrode (anode) current collector of the battery is a radio frequency identification tag antenna coated by a conductive polymer (Pedot:PSS) working as anode material. Since the battery is a dynamic device, subjected to discharging, the antenna design must include the variable dielectric properties of the conductive polymer which are here first characterized in the UHF band for real charge/discharge battery conditions. The communication performance of the prototype composite device is hence evaluated through the measurement of the realized gain of the tag antenna (−19.6 dBi at 870 MHz) when it is placed directly onto a volunteer’s forearm. The read range of 1.3–3 m is suitable for occasional data download from the epidermal data logger when the user comes close to a reader-equipped gate.

Item Type: Article
Projects: [UNSPECIFIED] Foresight Fellowship in Manufacturing: Defining and Fabricating New Passive Bio-Sensing Wireless Tag Technologies
Uncontrolled keywords: Conductive polymer, integrated battery-antenna device, planar battery, radio frequency identification (RFID)technology, wearable antenna.
Subjects: Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics (see also: telecommunications) > TK7871.6 Antennas and waveguides > TK7871.67.M53 Microwave antennas
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: John Batchelor
Date Deposited: 15 Dec 2017 11:31 UTC
Last Modified: 19 Feb 2018 11:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/65470 (The current URI for this page, for reference purposes)
Batchelor, John C.: https://orcid.org/0000-0002-5139-5765
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