A novel single-radiator card-type tag is proposed which is constructed using a series Hilbert-curve loop and matched stub for high frequency (HF)/ultra high frequency (UHF) dual-band radio frequency identification (RFID) positioning applications. This is achieved by merging the series Hilbert-curve for implementing the HF coil antenna, and square loop structure for implementing the UHF antenna to form a single RFID tag radiator. The RFID tag has directivity of 1.75 dBi at 25 MHz, 2.65 dBi at 785 MHz, 2.82 MHz at 835 MHz and 2.75 dBi at 925 MHz. The tag exhibits circular polarisation with −3 dB axial-ratio bandwidth of 14, 480, 605 and 455 MHz at 25, 785, 835 and 925 MHz, respectively. The radiation characteristics of the RFID tag is quasi-omnidirectional in its two orthogonal planes. Impedance matching circuits for the HF/UHF dual-band RFID tag are designed for optimal power transfer with the microchip. The resulting dual-band tag is highly compact in size and possesses good overall performance which makes it suitable for diverse applications.

Alibakhshi-Kenari, M., Naser-Moghadasi, M., Sadeghzadeh, R.A., Virdee, B.S., & Limiti, E. (2016). Dual-band RFID tag antenna based on the Hilbert-curve fractal for HF and UHF applications. IET CIRCUITS, DEVICES & SYSTEMS, 10(2), 140-146 [10.1049/iet-cds.2015.0221].

Dual-band RFID tag antenna based on the Hilbert-curve fractal for HF and UHF applications

LIMITI, ERNESTO
2016-02

Abstract

A novel single-radiator card-type tag is proposed which is constructed using a series Hilbert-curve loop and matched stub for high frequency (HF)/ultra high frequency (UHF) dual-band radio frequency identification (RFID) positioning applications. This is achieved by merging the series Hilbert-curve for implementing the HF coil antenna, and square loop structure for implementing the UHF antenna to form a single RFID tag radiator. The RFID tag has directivity of 1.75 dBi at 25 MHz, 2.65 dBi at 785 MHz, 2.82 MHz at 835 MHz and 2.75 dBi at 925 MHz. The tag exhibits circular polarisation with −3 dB axial-ratio bandwidth of 14, 480, 605 and 455 MHz at 25, 785, 835 and 925 MHz, respectively. The radiation characteristics of the RFID tag is quasi-omnidirectional in its two orthogonal planes. Impedance matching circuits for the HF/UHF dual-band RFID tag are designed for optimal power transfer with the microchip. The resulting dual-band tag is highly compact in size and possesses good overall performance which makes it suitable for diverse applications.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-INF/01 - Elettronica
English
Con Impact Factor ISI
electromagnetic wave polarisation; HF antennas; VHF antennas; impedance matching; omnidirectional antennas; multifrequency antennas; UHF antennas; radiofrequency identification
Alibakhshi-Kenari, M., Naser-Moghadasi, M., Sadeghzadeh, R.A., Virdee, B.S., & Limiti, E. (2016). Dual-band RFID tag antenna based on the Hilbert-curve fractal for HF and UHF applications. IET CIRCUITS, DEVICES & SYSTEMS, 10(2), 140-146 [10.1049/iet-cds.2015.0221].
Alibakhshi Kenari, M; Naser Moghadasi, M; Sadeghzadeh, R; Virdee, B; Limiti, E
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/160112
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