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Tag Design for RFID AC Current Sensing System

Ullah, Irfan and Horne, Robert and Sanz-Izquierdo, Benito and Batchelor, John C. (2020) Tag Design for RFID AC Current Sensing System. In: 2020 14th European Conference on Antennas and Propagation (EuCAP). IEEE, New York, USA. ISBN 978-1-72813-712-4. E-ISBN 978-88-312-9900-8. (doi:10.23919/EuCAP48036.2020.9135550) (KAR id:82063)


This study describes the development of an RFID tag system and antenna for real-time ac current sensing of individual appliances in smart homes. The operating principle of the tag system is based on the tag antenna tuning via a tuning circuit. The auto-tuning chip is embedded to compensate the antenna matching and stores the impedance tuning in the form of a 5–bit sensor code. The tag wirelessly streams the 5–bit sensor code that represents the ac current drawn by the electrical load, to the dedicated RFID reader in the range of 3 m at 868 MHz. The tag device is an energy harvester and a cost-effective ac current sensing solution compared to commercial smart meters in smart power metering systems. The antenna is designed to fit around the housing of the current sensor.

Item Type: Book section
DOI/Identification number: 10.23919/EuCAP48036.2020.9135550
Projects: INCASE
Uncontrolled keywords: RFID sensing, self-tuning tags, Internet of Things, smart home application.
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications > TK5105 Data transmission systems
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Organisations -1 not found.
Organisations -1 not found.
Depositing User: Irfan Ullah
Date Deposited: 10 Jul 2020 14:44 UTC
Last Modified: 09 Dec 2022 02:06 UTC
Resource URI: (The current URI for this page, for reference purposes)

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