Novel concentric hexagonal-shaped RFID tag antenna with T-shaped stub matching

Alibakhshikenari, Mohammad, Virdee, Bal Singh, Althuwayb, Ayman Abdulhadi, Xu, Kai-Du, See, Chan, Khan, Salahuddin, Park, Ikmo, Falcone, Francisco and Limiti, Ernesto (2022) Novel concentric hexagonal-shaped RFID tag antenna with T-shaped stub matching. IEEE Journal of Radio Frequency Identification, 6. pp. 112-120. ISSN 2469-7281

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Abstract / Description

This paper presents a unique concentric hexagonal-shaped ring antenna for radio frequency identification (RFID) tags. The rings are excited with a common microstrip feedline. The radiation characteristics of the antenna is improved by locating a horizontal a parasitic element in the vicinity of the hexagonal-shaped rings. The proposed antenna was used in the implementation of a 3×1 antenna array. The impedance match of the 3×1 RFID tag was enhanced by incorporating a T-shaped stub. The antenna is designed to operate at the UHF band from 800 MHz to 960 MHz. It was implemented on FR-4 substrate with dielectric constant and thickness of 4.3 and 1.6 mm, respectively. The size of the RFID tag antenna is 36×10 mm2. Its impedance was matched to Alien Higgs RFIC chip of impedance 10 – j 82.5 Ω at 895 MHz. Measured results show the proposed RFID tag antenna provides an impedance bandwidth, maximum gain and radiation efficiency of 160 MHz, 2 dBi, and 66.5%, respectively. With effective isotropic radiated power (EIRP) limited to 36 dBm to comply with FCC regulations for UHF band RFIDs it radiates in the broadside direction over a range of 9 m making it desirable for various applications including supply chain management, logistic control, and vehicle identification.

Item Type:	Article
Uncontrolled Keywords:	RFID tag; concentric hexagonal-shaped ring antenna; microstrip integrated circuits; UHF band; impedance matching circuit; effective isotropic radiated power (EIRP)
Subjects:	600 Technology > 620 Engineering & allied operations
Department:	School of Computing and Digital Media
Depositing User:	Bal Virdee
Date Deposited:	15 Nov 2021 09:44
Last Modified:	20 Jan 2023 12:47
URI:	https://repository.londonmet.ac.uk/id/eprint/7097

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