A compact dipole UHF-RFID tag antenna

Ali, Mohd Tarmizi; Ismail, I.; Sukaimi, N. H. M.

doi:10.1109/rfm.2013.6757274

Cited by 14 publications

(4 citation statements)

References 6 publications

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“…For massive industrial usage, the read range (RR) is another debatable boundary of IoT in smart 5G systems. In this way, it cannot be disregarded when an RFID tag is examined and the Friis conditions assume a significant job to uncover the RR ( d max,read ) [ 10 , 26 , 31 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ], as shown in Equation (5):

where c (speed of light) = 3 × 10 8 m/s, f is the targeted frequency, the EIRP (effective isotropic radiated power) is set as a standard by state spectrum regulations—for example, EIRP = 3.28 W for the EU UHF standard and EIRP = 4 W for the NA UHF standard— τ is the transmission loss, and P chip,tag = 0.0316 × 10 −3 W (−15 dBm). τ should be unity or less than unity, and it is calculated using the resistances and impedances of the flip-chip package and the manufactured antenna.…”

Section: Resultsmentioning

confidence: 99%

A Compact and Flexible UHF RFID Tag Antenna for Massive IoT Devices in 5G System

Hussain

Amin

Lee

2020

Sensors

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Upcoming 5th-generation (5G) systems incorporate physical objects (referred to as things), which sense the presence of components such as gears, gadgets, and sensors. They may transmit many kinds of states in the smart city context, such as new deals at malls, safe distances on roads, patient heart rhythms (especially in hospitals), and logistic control at aerodromes and seaports around the world. These serve to form the so-called future internet of things (IoT). From this futuristic perspective, everything should have its own identity. In this context, radio frequency identification (RFID) plays a specific role, which provides wireless communications in a secure manner. Passive RFID tags carry out work using the energy harvested among massive systems. RFID has been habitually realized as a prerequisite for IoT, the combination of which is called IoT RFID (I-RFID). For the current scenario, such tags should be productive, low-profile, compact, easily mountable, and have eco-friendly features. The presently available tags are not cost-effective and have not been proven as green tags for environmentally friendly IoT in 5G systems nor are they suitable for long-range communications in 5G systems. The proposed I-RFID tag uses the meandering angle technique (MAT) to construct a design that satisfies the features of a lower-cost printed antenna over the worldwide UHF RFID band standard (860–960 MHz). In our research, tag MAT antennas are fabricated on paper-based Korsnäs by screen- and flexo-printing, which have lowest simulated effective outcomes with dielectric variation due to humidity and have a plausible read range (RR) for European (EU; 866–868 MHz) and North American (NA; 902–928 MHz) UHF band standards. The I-RFID tag size is reduced by 36% to 38% w.r.t. a previously published case, the tag gain has been improved by 23.6% to 33.12%, and its read range has been enhanced by 50.9% and 59.6% for EU and NA UHF bands, respectively. It provides impressive performance on some platforms (e.g., plastic, paper, and glass), thereby providing a new state-of-the-art I-RFID tag with better qualities in 5G systems.

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Section: Resultsmentioning

confidence: 99%

A Compact and Flexible UHF RFID Tag Antenna for Massive IoT Devices in 5G System

Hussain

Amin

Lee

2020

Sensors

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“…As shown in Fig. 4, the UHF antenna is a left-right symmetric structure with an impedance matching ring in the middle, a folded dipole connected to the matching ring, and radiating patches [22] 4, one can observe that the dimensions of the matching ring and the end radiation patches have a significant influence on the impedance of the UHF RFID tag antenna. This is because the ring structure can introduce inductance and capacitance, and the end-loading method can accumulate more charges and increase the equivalent capacitance of the tag antenna [22].…”

Section: Discussionmentioning

confidence: 99%

MSCNN-LSTM Model for Predicting Return Loss of the UHF Antenna in HF-UHF RFID Tag Antenna

Zhao¹,

Zhang²,

Li³

et al. 2023

Computers, Materials &Amp; Continua

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High-frequency (HF) and ultrahigh-frequency (UHF) dual-band radio frequency identification (RFID) tags with both near-field and farfield communication can meet different application scenarios. However, it is time-consuming to calculate the return loss of a UHF antenna in a dualband tag antenna using electromagnetic (EM) simulators. To overcome this, the present work proposes a model of a multi-scale convolutional neural network stacked with long and short-term memory (MSCNN-LSTM) for predicting the return loss of UHF antennas instead of EM simulators. In the proposed MSCNN-LSTM, the MSCNN has three branches, which include three convolution layers with different kernel sizes and numbers. Therefore, MSCNN can extract fine-grain localized information of the antenna and overall features. The LSTM can effectively learn the EM characteristics of different structures of the antenna to improve the prediction accuracy of the model. Experimental results show that the mean absolute error (0.0073), mean square error (0.00032), and root mean square error (0.01814) of the MSCNN-LSTM are better than those of other prediction methods. In predicting the return loss of 100 UHF antennas, compared with the simulation time of 4800 s for High Frequency Structure Simulator (HFSS), MSCNN-LSTM takes only 0.927519 s under the premise of ensuring prediction accuracy, significantly reducing the calculation time, which provides a basis for the rapid design of HF-UHF RFID tag antenna. Then MSCNN-LSTM is used to determine the dimensions of the UHF antenna quickly. The return loss of the designed dualband RFID tag antenna is −58.76 and −22.63 dB at 13.56 and 915 MHz, respectively, achieving the desired goal.

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“…1(b). A meander-line technique [13][14][15] is used to increase the electrical length of the antenna, and nonuniform lines (track width, w , and length, l ) with smooth corners form the grounds of this newly proposed design. The optimized w and l were found iteratively.…”

Section: Proposed Uhf Rfid Tag Antennamentioning

confidence: 99%

All-in-One Uhf Rfid Tag Antenna for Retail Garments Using Nonuniform Meandered Lines

Kumar¹,

Sharma²,

Zuazola³

2020

PIER Letters

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A compact dipole UHF-RFID tag antenna

Cited by 14 publications

References 6 publications

A Compact and Flexible UHF RFID Tag Antenna for Massive IoT Devices in 5G System

A Compact and Flexible UHF RFID Tag Antenna for Massive IoT Devices in 5G System

MSCNN-LSTM Model for Predicting Return Loss of the UHF Antenna in HF-UHF RFID Tag Antenna

All-in-One Uhf Rfid Tag Antenna for Retail Garments Using Nonuniform Meandered Lines

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