Proceedings of the Third International Conference on Computing and Wireless Communication Systems, ICCWCS 2019, April 24-25, 2019, Faculty of Sciences, Ibn Tofaïl University -Kénitra- Morocco

Research Article

A New Design of a Miniaturized UHF-RFID Passive Tag Antenna Based on L-Shape Radiators with Meandered Dipole

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  • @INPROCEEDINGS{10.4108/eai.24-4-2019.2284091,
        author={Yassine  Gmih and Abdelmajid  Farchi},
        title={A New Design of a Miniaturized UHF-RFID Passive Tag Antenna Based on L-Shape Radiators with Meandered Dipole},
        proceedings={Proceedings of the Third International Conference on Computing and Wireless Communication Systems, ICCWCS 2019, April 24-25, 2019, Faculty of Sciences, Ibn Tofa\~{n}l University -K\^{e}nitra- Morocco},
        publisher={EAI},
        proceedings_a={ICCWCS},
        year={2019},
        month={5},
        keywords={tag antenna; meander-line; t-match; ultra-high frequency; radio frequency identification; l-shape radiators; read range;},
        doi={10.4108/eai.24-4-2019.2284091}
    }
    
  • Yassine Gmih
    Abdelmajid Farchi
    Year: 2019
    A New Design of a Miniaturized UHF-RFID Passive Tag Antenna Based on L-Shape Radiators with Meandered Dipole
    ICCWCS
    EAI
    DOI: 10.4108/eai.24-4-2019.2284091
Yassine Gmih1,*, Abdelmajid Farchi1
  • 1: Laboratory of Mechanical Engineering, Industrial Management and Innovation, University Hassan 1st, Faculty of Sciences and Technologies, Settat- Morocco
*Contact email: yassine.gmih@gmail.com

Abstract

This article suggests a simple and new miniaturized antenna for radio-frequency identification (RFID) tags in the European and Moroccan UHF band (866–869 MHz). Our structure consists of a meandering dipole, L-shaped radiators and a changed T-Match network. The meander technique was applied to decrease the antenna size; using this method, the size of our structure has been reduced to 68% compared to the classical UHF dipole. L-shaped radiators and a modified T-matching approach are also used to easily match the antenna input impedance to that of the chip to maximize power transfer. The size of our antenna is 50 x 22 mm2, it has been designed on a single-sided FR-4 substrate with a thickness of 0.8 mm for a relative permittivity, Ɛr of 4.4. For our design, we chose the Higgs 4 IC chip (manufactured by Alien Technology, USA) which has an impedance of 20.5-j191 Ω obtained at the centre frequency 867 MHz. The antenna performance was studied with respect to the impedance matching, realized gain, reflection coefficients and read range of the label. Therefore, the proposed design achieved a gain of 1.2 dB and a maximum reading range of 13.94 meters at 867 MHz.