Slotted Folded Patch Antenna With Double-T-slots for Platform-Insensitive UHF Tag Design

Lee, Shin-Rou; Lim, Eng-Hock; Bong, Fwee-Leong; Chung, Boon-Kuan

doi:10.1109/tap.2018.2878346

Cited by 22 publications

(18 citation statements)

References 10 publications

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“…It can be seen that the proposed tag antenna has the best size ratio performance. The antenna proposed in [11] has a similar footprint as this tag, but it is much larger in size than that in this article, and the read distance achieved by it is shorter than ours. Although the tag antennas proposed in [12] have a read distance close to ours, their antennas have a larger footprints, which may make them limited in many practical applications.…”

Section: Parametric Analysismentioning

confidence: 83%

Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive Uhf Rfid Tags to Cohere on Metal

Ma¹,

Ning²,

Meng³

et al. 2020

PIER Letters

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A planar I-shaped folded-patch antenna with a footprint of 21 mm × 21 mm × 1.6 mm is designed for compact UHF RFID tags to cohere on metal. The antenna consists of three parts: a square ground plane, an I-shaped patch, and a ring resonator. The I-shaped patch is interconnected to the ground plane through a narrow shorting stub, and the microstrip feed line is inserted into the patch to reduce the input impedance of the patch. Extra capacitance and inductance introduced by the ring resonator can lower the tag's resonant frequency down to the expected UHF RFID band. The proposed antenna is manufactured, and there is excellent consistency between simulation and measurement results. The proposed tag antenna achieves a far read distance up to 6.3 m on metal (with 4 W equivalent isotropic radiated power) at resonant frequency of 920 MHz.

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Section: Parametric Analysismentioning

confidence: 83%

Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive Uhf Rfid Tags to Cohere on Metal

Ma¹,

Ning²,

Meng³

et al. 2020

PIER Letters

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show abstract

“…e tag antenna mounted on the metallic surface is able to achieve a maximum read distance of 7.2 m, but the read performance of the tag in free space has not been studied. Referring to Table 2 again, the tag in [14] is compact and flexible, but employing slots for miniaturization can complicate the design and fabrication process. Also, their achievable read distances inside the anechoic cabinet are shorter than ours.…”

Section: Resultsmentioning

confidence: 99%

“…Also, their achievable read distances inside the anechoic cabinet are shorter than ours. However, the read distances are also estimated in [14], which is able to reach 5.2 m, when the tag is placed on a metal plate. With a reasonable tag size, our proposed tag is able to achieve reasonable read distances in both free space and metallic objects.…”

Section: Resultsmentioning

confidence: 99%

“…To achieve compact size, a flexible patch antenna in [11] was designed using the serration technique and was able to achieve read distances of 7 m when attached to a 20 cm × 20 cm metal plate. To further reduce the patch antenna size, the folding method has recently been proposed for designing various flexible RFID tags for on-metal applications [12][13][14][15]. As the size reduces, there is an increase in ohmic losses, consequently affecting the antenna performances such as gain, efficiency, and directive radiation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel 3D PILA-Type UHF RFID Tag Antenna Mountable on Metallic Objects for IoT Indoor Localization

Dhaouadi

Choubani

2021

International Journal of Antennas and Propagation

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In this paper, a novel 3D planar inverted-L antenna (PILA) Ultrahigh Frequency (UHF) Radio Frequency Identification (RFID) tag mountable on metallic surfaces is proposed for the Internet of Things (IoT) indoor localization applications. The proposed tag antenna (45 mm × 82 mm × 4 mm or 0.137λ × 0.25λ × 0.012λ) is designed for mounting on metallic objects. The 3D PILA antenna is fabricated using a copper sheet of thickness 1 mm and air as the dielectric substrate in order to minimize costs for materials and realization. In the design, T-slot has been inserted in the radiating element for tuning of the tag’s resonance for achieving good matching with the chip. Also, a simple equivalent circuit model has been obtained to analyze the impedance of the 3D PILA. Based on the optimized design, the fabricated prototype has been measured in the anechoic chamber. The resonant frequency of the proposed tag is stable, and it is not affected much by the metallic object. The measurement results of the antenna prototype demonstrated a reasonable agreement with the simulation results, and a read range of 3.6 m was measured inside an anechoic chamber. Most importantly, in the building hallway, the proposed tag is able to achieve a maximum read distance of 18 m with a transmitted power of 31.5 dBm at 867 MHz when placed on metal. With the 3D PILA antenna structure, the proposed antimetal tag is a suitable solution that can be integrated into an indoor localization scenario.

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“…Meanwhile, the works presented in refs. [24][25][26]28,32,37] have used folding polyethylene terephthalate (PET) around the foam without requiring any metallic vias or shorting pins. However, the best achieved realized gain is 1 dB for the designed work in ref.…”

Section: Simulated and Measured Resultsmentioning

confidence: 99%

Miniature Compact Folded Dipole for Metal Mountable UHF RFID Tag Antenna

et al. 2019

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This article describes the design of an Ultra-High Frequency (UHF) miniature folded dipole Radio Frequency Identification (RFID) tag antenna that can be mountable on metallic objects. The compact tag antenna is formed from symmetric C-shaped resonators connected with additional arms embedded into the outer strip lines for miniaturization purposes. It is loaded with outer strip lines, resulting in a flexible tuning method that is capable of matching the integrated circuit (IC) chip’s impedance. The proposed tag is fabricated on a single layer of Polytetrafluoroethylene (PTFE) substrate. It has simple structure and does not require any metallic vias or shorting plate. The miniature tag antenna with a size of 82.75 × 19.5 × 1.5 mm 3 yields a total realized gain of − 0.53 dB at the resonance frequency when attached to a 40 × 40 cm 2 metal plate. The presented design utilizes a European RFID band, and the simulated results of realized gain, read range, and input impedance are verified with measurement results.

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Slotted Folded Patch Antenna With Double-T-slots for Platform-Insensitive UHF Tag Design

Cited by 22 publications

References 10 publications

Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive Uhf Rfid Tags to Cohere on Metal

Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive Uhf Rfid Tags to Cohere on Metal

A Novel 3D PILA-Type UHF RFID Tag Antenna Mountable on Metallic Objects for IoT Indoor Localization

Miniature Compact Folded Dipole for Metal Mountable UHF RFID Tag Antenna

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