Circularly Polarized Loop Tag Antenna for Long Reading Range RFID Applications

Chen, Horng‐Dean; Tsai, Ching-Han; Sim, Chow‐Yen‐Desmond; Kuo, Che-Yang

doi:10.1109/lawp.2013.2288138

Cited by 49 publications

(35 citation statements)

References 8 publications

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“…To overcome this hurdle, the concept of circular polarization (CP) is applied to increase the power received by the RFID tag and simultaneously increase the reading range of the antenna. Various types of passive RFID tag antennas with CP radiation have been studied, including designs based on planar circular patch antennas [10], square microstrip patch antennas [11]- [13], and loop antennas [14]. However, the aforementioned antennas have drawbacks that include large size, the need for a high-dielectric substrate, or multi-layer substrates, which make antennas bulky.…”

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confidence: 99%

A Compact Circularly Polarized Crossed-Dipole Antenna for an RFID Tag

Tran

2015

Antennas Wirel. Propag. Lett.

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A compact circularly polarized (CP) crossed-dipole antenna for radio frequency identification in the ultra-high frequency is proposed. The antenna consists of two orthogonal dipoles with an arm comprised of a meander line and triangular-shaped ending for achieving a compact size. A modified T-match with a meander line is used for impedance matching between the antenna and the tag chip. In this design, CP excitation is achieved by incorporating two semi-circular curves inserted between the orthogonally arranged dipole arms. The final design, with the dimensions of 35.6 × 35.6 × 0.508 mm 3 , yields a -10-dB impedance bandwidth of 37 MHz (892-929 MHz) and a 3-dB axial ratio bandwidth of 11.4 MHz (905.2-916.6 MHz). The measured results show that the proposed tag antenna can provide a maximum reading distance of approximately 7.6 m with an effective isotropic radiated power of 3.28 W over the CP operational bandwidth.Index Terms-circular polarization, crossed dipole, meander line, radio frequency identification, tag antenna I. INTRODUCTIONN recent years, radio frequency identification technology (RFID) in the ultra-high frequency (UHF; 860-940 MHz) band becomes mainstream applications that help the speed of handling manufactured goods and materials [1]. RFID systems are composed of at least three core components: RFID tags, RFID readers, and databases that associate arbitrary records with tag identifying data. It is obvious that a tag antenna plays a key role in overall RFID system performance factors because passive tags obtain energy from the incoming radio frequency communication signal. Therefore, the tag antenna has substantial effects on the reading distance, the overall size, and the compatibility with the tagged object of RFID systems. To date, many miniaturized tag antennas, such as a planar meander-line antenna [2], loop-fed antenna [3], modified folded dipole antenna [4,5], monopole with helical strips and vias [6], and printed symmetric inverted-F antenna with a quasi-isotropic radiation pattern [7]-[9], have been proposed for the RFID system. However, all the above-presented miniaturized tag 1536-1225 (c)

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A Compact Circularly Polarized Crossed-Dipole Antenna for an RFID Tag

Tran

2015

Antennas Wirel. Propag. Lett.

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“…There are various circularly polarized antennas that have been proposed over the years, such as square patch antennas, planar dipole antennas, circular microstrip patch antennas, and loop antennas . However, these designs have drawbacks that include large size and printed on multilayer substrates with high dielectric value, which make antennas bulky.…”

Section: Introductionmentioning

confidence: 99%

A novel compact circularly polarized tag antenna with differential‐RFIC for EU UHF RFID applications

Jebbawi

Egels

Pannier

2019

Micro & Optical Tech Letters

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In this paper, a novel compact ultra‐high frequency (UHF) tag antenna for radio frequency identification is presented. This tag uses the Monza‐X from Impinj as a differential radio frequency integrated circuit. A wideband circular polarization was achieved. The frequency range covered for an axial ratio (AR) < 3 dB is from 830 to 903 MHz. The designed antenna is simulated by using the electromagnetic software ansys high frequency structure simulator. The tag antenna is printed on 50 × 50 mm2 of Roger 4350B substrate with a dielectric constant (Ԑr) of 3.66 and thickness of 1.52 mm. The manufactured tag antenna performance has been tested by measuring the reading distance. The measurement results show good values of reading range (RR) especially in the EU Radio Frequency IDentification band. The tag has a maximum RR of about 13.3 m at 865 MHz with an Effective Isotropic Radiated Power of 2 W.

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“…Furthermore, a compact circularly polarized structure of UHF RFID tag antenna has been presented by Lu and Chang in Reference by introducing a Y‐shaped slit and two orthogonal N‐shaped slits to provide wider half power operating bandwidth (135 MHz); but the obtained 3‐dB AR bandwidth is less than 10 MHz. Square‐loop and meandered‐loop CP antennas have also been studied for long read range UHF RFID systems. The meandered‐loop antenna exhibits antenna size miniaturization in comparison to square‐loop antenna.…”

Section: Introductionmentioning

confidence: 99%

“…Square‐loop and meandered‐loop CP antennas have also been studied for long read range UHF RFID systems. The meandered‐loop antenna exhibits antenna size miniaturization in comparison to square‐loop antenna. A CP square ring tag with meander strip is proposed for the automatic toll collection system which reported 64% smaller size than the antennas attached to safety glass but it has only 8.3 m read range.…”

Section: Introductionmentioning

confidence: 99%

Linearly tapered meander line cross dipole circularly polarized antenna for UHF RFID tag applications

Bhaskar

Singh

2018

Int J RF Microw Comput Aided Eng

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In this article, a circularly polarized antenna for ultra‐high frequency radio frequency identification (RFID) tag is presented. The circular polarization is realized by two orthogonal, unequal length linearly tapered meander line cross dipoles. The meander structure with capacitive tip loading is used for size miniaturization of the antenna. A modified T‐match network is employed to feed the cross dipole structure. The measured 10‐dB return loss bandwidth of the cross dipole antenna is 17 MHz (908‐923 MHz) and the corresponding 3‐dB axial ratio bandwidth is 6 MHz (912‐918 MHz). The overall size of the proposed antenna is 0.17λ0 × 0.17λ0 at 915 MHz. The maximum read range between the reader and the tag with the proposed antenna is 4.7 m larger than the analogous linearly polarized tag antenna due to the reduction in polarization loss between the tag and reader antennas. Thus, a maximum read range of 15.66 m with the gain of 1.28 dBic is achieved at 915 MHz.

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Circularly Polarized Loop Tag Antenna for Long Reading Range RFID Applications

Cited by 49 publications

References 8 publications

A Compact Circularly Polarized Crossed-Dipole Antenna for an RFID Tag

A Compact Circularly Polarized Crossed-Dipole Antenna for an RFID Tag

A novel compact circularly polarized tag antenna with differential‐RFIC for EU UHF RFID applications

Linearly tapered meander line cross dipole circularly polarized antenna for UHF RFID tag applications

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