Research on U-shaped tuning stub RFID tag on different objects

Chen, Chien‐Hung; Lin, Yi‐Fang; Chen, Hua‐Ming

doi:10.1017/s1759078714001135

Cited by 4 publications

(6 citation statements)

References 18 publications

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“…Several types of LP UHF tag antennas, such as dipole, patch, and inverted F-antennas, have been studied. [1][2][3][4][5][6][7][8] In this study, the proposed LP tag received only half of the power transmitted by the CP reader antenna because of polarization mismatch. Theoretically, a half-power (3-dB) variation can change the reading range by approximately 41%.…”

Section: Introductionmentioning

confidence: 95%

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Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

Chen

Huang

2018

Int J RF Microw Comput Aided Eng

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In this study, a circularly polarized (CP) radio frequency identification (RFID) tag antenna with a capacitive short‐circuited microstrip feed line was mounted on a metallic plane. This tag antenna comprised a low‐profile substrate and a square‐ring patch radiator with two pairs of T‐shaped slots that produced CP radiation. A conjugate match to an Alien Higgs‐4 chip with an impedance of 8‐j149 Ω at 925 MHz was obtained by connecting two short‐circuited microstrip lines in series. This article describes a new method for matching CP impendences. The chip impedance can be easily matched by adjusting the length of microstrip lines and by using coupling gaps. Tests of an RFID reader with a linearly polarized (LP) antenna indicated that the CP tag antenna had a low 3‐dB axial ratio bandwidth (921‐930 MHz) and an omnidirectional reading range. In contrast, the LP tag had double null cancelation in the reading region. The proposed CP tag antenna had a similar reading range but a different attached orientation. This antenna tag (and other RFID hard tags) can also be affixed to surfaces with screws, pop rivets, and industrial adhesives. The proposed antenna can be attached to goods transported by freight trucks.

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Section: Introductionmentioning

confidence: 95%

“…Several types of LP UHF tag antennas, such as dipole, patch, and inverted F‐antennas, have been studied . In this study, the proposed LP tag received only half of the power transmitted by the CP reader antenna because of polarization mismatch.…”

Section: Introductionmentioning

confidence: 99%

Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

Chen

Huang

2018

Int J RF Microw Comput Aided Eng

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“…Moreover, a study on the performance of RFID U‐shaped dipole tag antenna that is placed on different permittivity surfaces has been reported in Ref. . For near‐field applications, a meander line tag antenna designed for Europe band and used for short‐distance RFID UHF tagging for tracking packages in transport is proposed.…”

Section: Introductionmentioning

confidence: 99%

Design of a compact size tag antenna based on split ring resonator for UHF RFID application

Abdelkarim

Naoui

Latrach

et al. 2018

Int J RF Microw Comput Aided Eng

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In this article, a new design of miniaturized split-ring resonator antenna using a meander line technique with a simple impedance matching method applicable to UHF-RFID tags is presented. The new approach is based on the integration of a meander line into the radiating element of SRR to reduce the electrical tag size and a theoretical demonstration to calculate the conjugate impedance matching and directly attach the antenna with the chip. The new SRR antenna, which is printed on the flexible substrate Arlon CuClad 250LX, is designed using Alien Higgs 3 RFID ASIC whose input impedance is 25-j190. The prototype antenna has a low-cost compact size (18.28 mm × 18.28 mm) with a read range higher than 4 m within the RFID UHF band and with a roughly 4.2-m peak range at 915 MHz. As a proof of behavior, a tag prototype is fabricated and measured to operate at a UHF RFID band. Based on some works' results, an optimized design is obtained with a 48% size reduction compared with the classic split ring resonator antenna and with a good impedance matching the antenna with RFID ASIC without the need for any external matching network. K E Y W O R D S compact antenna, passive tag antenna, split ring resonator, UHF RFID application 1 | INTRODUCTIONNowadays, radio frequency identification (RFID) is becoming an increasingly interesting technology for research due to its high data rate, easy read/write functions and long readable range between the reader and tag. This development in RFID technology has led to great demands in different fields all over the world, such as smart parking application agriculture, airport access control, libraries, vehicle security military, passport, supply chain, and mobile payment. 1,2 In the applications of RFID systems, the only active component reader sends radio frequency signals and information to a passive tag which includes an antenna and an integrated circuit (ASIC). The chip which contains the information about the tagged item converts the unmodulated signal and sends its information back to the reader for the automatic identification of objects. 3,4 In several UHF RFID applications, we need a small-tag antenna to be flexibly mounted on different device components. For this reason, the major challenging aspect concerning passive UHF RFID tags is the size reduction. In literature, there are lots of studies which have been reported on small tags based on dipole or patch antennas. In Ref. 5, the authors presented an overview of the RFID passive tag in terms of antenna impedance, chip impedance, antenna performance, and read range measurement. Moreover, a study on the performance of RFID U-shaped dipole tag antenna that is placed on different permittivity surfaces has been reported in Ref. 6. For near-field applications, 7 a meander line tag antenna designed for Europe band and used for short-distance RFID UHF tagging for tracking packages in transport is proposed. In Ref. 8, an RFID tag dipole antenna operating at the whole UHF frequency band has been presented to be used for bandwidth optimizati...

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“…It is well known that most dipole-type antennas are adopted for RFID tags and use various inductively feeding techniques, such as T-matched feed, loop coupled feed, and U-shaped feed, in order to obtain high inductive reactance of the tags. For size requirement, curved dipole and meandering structures have been commonly used to reduce the length of the tag antenna [2–8]. Recently, a ground plane mode is proposed to overcome a bandwidth limitation.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of ground radiation tag antenna with Tunable open-slot exciter

Lin

Chang

Chen

et al. 2016

Int. J. Microw. Wireless Technol.

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A novel radio frequency identification tag antenna is composed of a resonant open-slot exciter and a dipole-type ground radiator. For a conjugate match to the Alien Higgs-4 chip impedance of 8−j149 Ω at 925 MHz, a quarter wavelength open-slot resonator embedded at the center of the dipole-type ground plane (130 × 18 mm2) was investigated and fabricated. Simple size adjustments and various loaded inductor of the open-slot resonator allow for easy control of the tag antenna resistance and inductive reactance, from which the chip impedance requirement can be easily obtained. The read range of the prototype antenna attached on a foam in the free space can reach more than 9 m, which has been tested for a radio frequency identification reader with 4.0-W of effective isotropic radiated power. Measurement data are in good agreement with simulation results.

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Research on U-shaped tuning stub RFID tag on different objects

Cited by 4 publications

References 18 publications

Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

Design of a compact size tag antenna based on split ring resonator for UHF RFID application

Theoretical study of ground radiation tag antenna with Tunable open-slot exciter

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