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Flexible Radio-Frequency Identification (RFID) Tag Antenna for Sensor Applications

Centre of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
Laboratory of Spacecraft Environment Interaction Engineering (LaSEINE), Kyushu Institute of Technology, Fukuoka 804-8550, Japan
Author to whom correspondence should be addressed.
Sensors 2018, 18(12), 4212;
Received: 26 August 2018 / Revised: 19 September 2018 / Accepted: 26 September 2018 / Published: 30 November 2018
(This article belongs to the Special Issue Antenna Technologies for Microwave Sensors)
PDF [1955 KB, uploaded 30 November 2018]


In this paper, an inkjet-printed flexible Radio-Frequency Identification (RFID) tag antenna is proposed for an ultra-high frequency (UHF) sensor application. The proposed tag antenna facilitates a system-level solution for low-cost and faster mass production of RFID passive tag antenna. The tag antenna consists of a modified meander line radiator with a semi-circular shaped feed network. The structure is printed on photo paper using silver nanoparticle conductive ink. The generic design outline, as well as tag antenna performances for several practical application aspects are investigated. The simulated and measured results verify the coverage of universal UHF RFID band with an omnidirectional radiation pattern and a long-read range of 15 ft. In addition, the read range for different bending angles and lifetimes of the tag antenna are also demonstrated. View Full-Text
Keywords: flexible RFID tag; long read range; RFID sensor ink-jet printing; UHF band flexible RFID tag; long read range; RFID sensor ink-jet printing; UHF band

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Islam, M.T.; Alam, T.; Yahya, I.; Cho, M. Flexible Radio-Frequency Identification (RFID) Tag Antenna for Sensor Applications. Sensors 2018, 18, 4212.

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