Comparison of UHF RFID loop matching antennas based on various substrate-metal material combinations

Rishani, Nadeen; Gourari, F.; Dubouil, Julien; Laheurte, Jean‐Marc; Shubair, Raed M.; Chakra, Sara Abou

doi:10.1109/menacomm.2018.8371046

Cited by 2 publications

(4 citation statements)

References 13 publications

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“…A loop matched dipole, originally designed in [15], is realized using silver nanoparticle ink printed on a PET paper provided by [16]. The antenna is matched at 900 MHz to the Impinj Monza 5 [17] RFID chip whose input impedance is modelled as 1.8 kΩ//1.07 pF.…”

Section: Rfid Tag Antenna Designmentioning

confidence: 99%

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Optimization of the Wheeler Cap Technique for Efficiency Measurement of Rfid Antennas Matched to Complex Loads

Rishani¹,

Laheurte²,

Protat³

et al. 2021

PIER Letters

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This paper proposes an improved mathematical formulation of Johnston's approach to measure the radiation efficiency of an antenna, based on the Wheeler Cap (WC) technique. The proposed modifications allow the measurement of the radiation efficiency of small antennas matched to complex loads implemented on Radio Frequency IDentification (RFID) tags. The studied structure is a low-cost, silver-printed, differentially-fed RFID dipole antenna. The antenna is printed on a flexible PET (polyethylene terephthalate) paper that is conformable on various objects. Link budget measurements validate the accuracy of the formulation, which can be applied to any dipole antenna matched to an RFID chip with a complex input impedance.

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Section: Rfid Tag Antenna Designmentioning

confidence: 99%

“…The silver ink was modeled as having a conductivity of 1.46 × 10 7 and a thickness of 0.2 µm. The PET paper was simulated with thickness of 0.135 mm and relative permittivity of 6.5 [15]. Initially, the antenna was simulated in free space to find S parameters and the efficiency calculated by HFSS, shown in Fig.…”

Section: Simulated Radiation Efficiencymentioning

confidence: 99%

Optimization of the Wheeler Cap Technique for Efficiency Measurement of Rfid Antennas Matched to Complex Loads

Rishani¹,

Laheurte²,

Protat³

et al. 2021

PIER Letters

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mentioning

confidence: 99%

“…Fabric is a flexible and air permeable textile material suitable for wearables, and its properties, such as moisture regain, elasticity, dielectric properties and thickness affect the structure and performance of the antenna. [21][22][23][24][25][26] Lagha et al 25 simulated and analyzed the performance of two fabric-based antennas in polyester and denim fabrics. The return loss and directivity were similar between two fabric-based antennas, but the realized gain of the antenna based on polyester fabric was higher than that of denim fabric, which was attributed to the small dielectric loss tangent of polyester fabric.…”

mentioning

confidence: 99%

Substrate effect and structure optimization of fabric-based circularly polarized dipole antenna for radio frequency energy harvesting

Zheng

Jiang

2023

Textile Research Journal

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Radio frequency energy harvesting on textiles is seen as a method of enabling sustainable battery-free operation for wearable devices, while few works have clarified the influence of fabric properties on antenna performance. To prepare successfully a fabric-based circularly polarized antenna for radio frequency energy harvesting, this paper will clarify the effect of key fabric characteristics (such as dielectric properties and fabric thickness) on antenna performance by a finite element simulation. The simulated results showed the antenna resonant frequency is inversely proportional to the half square of the fabric’s dielectric constant, and the antenna radiation efficiency and gain are inversely proportional to the square of its dielectric loss tangent and thickness. Then, for the typical fabric substrates, the structure parameters of the existing circularly polarized antenna are optimized to work in the expected working frequency band, and the dominating structure parameter of the antenna in performance was identified. The optimized antenna prototype has excellent performance. The antenna has a bandwidth of 350 MHz and a maximum transmission distance of 190 cm. The received signal strength indication per unit area is 2.35 mW/cm2 and the output voltage is 1.19 mV/cm2 at a distance of 100 cm. It is concluded that the flexible size-minimized wide bandwidth circularly polarized radio frequency energy harvesting antenna screen-printed on fabric was derived from a commercial circularly polarized antenna with fiber-reinforced epoxy plate (FR4) substrate, and the critical geometrical and material parameters of the fabric substrate for this antenna performance as well as the affecting mechanism were identified.

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Comparison of UHF RFID loop matching antennas based on various substrate-metal material combinations

Cited by 2 publications

References 13 publications

Optimization of the Wheeler Cap Technique for Efficiency Measurement of Rfid Antennas Matched to Complex Loads

Optimization of the Wheeler Cap Technique for Efficiency Measurement of Rfid Antennas Matched to Complex Loads

Substrate effect and structure optimization of fabric-based circularly polarized dipole antenna for radio frequency energy harvesting

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