scholarly journals Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags

2021 ◽  
Author(s):  
Mahmoud Wagih ◽  
Junjie Shi
Keyword(s):  
Smart Cities ◽  
Impedance Matching ◽  
High Sensitivity ◽  
Dipole Antenna ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Sensing Applications ◽  
Ice Detection ◽  
Low Permittivity ◽  
Read Range

Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios and up to 10~m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. Unlike conventional RSS-based sensing approaches where the tag's read-range is reduced as the RSS decreases in response to the stimulant, the ice superstrate improves the impedance matching of the tags, maintaining a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The long range and high sensitivity show that UHF RFID is a promising method of detecting and monitoring ice formation and thawing in future smart cities.

scholarly journals Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags

2021 ◽  
Author(s):  
Mahmoud Wagih ◽  
Junjie Shi
Keyword(s):  
Smart Cities ◽  
Impedance Matching ◽  
High Sensitivity ◽  
Dipole Antenna ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Sensing Applications ◽  
Ice Detection ◽  
Low Permittivity ◽  
Read Range

Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios and up to 10~m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. Unlike conventional RSS-based sensing approaches where the tag's read-range is reduced as the RSS decreases in response to the stimulant, the ice superstrate improves the impedance matching of the tags, maintaining a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The long range and high sensitivity show that UHF RFID is a promising method of detecting and monitoring ice formation and thawing in future smart cities.

scholarly journals Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags

2021 ◽  
Author(s):  
Mahmoud Wagih ◽  
Junjie Shi
Keyword(s):  
Smart Cities ◽  
Impedance Matching ◽  
High Sensitivity ◽  
Dipole Antenna ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Sensing Applications ◽  
Ice Detection ◽  
Low Permittivity ◽  
Read Range

Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios and up to 10~m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. Unlike conventional RSS-based sensing approaches where the tag's read-range is reduced as the RSS decreases in response to the stimulant, the ice superstrate improves the impedance matching of the tags, maintaining a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The long range and high sensitivity show that UHF RFID is a promising method of detecting and monitoring ice formation and thawing in future smart cities.

Design and Analysis of UHF RFID Tag Antenna on the Surface of Cylinder

2014 ◽  
Vol 541-542 ◽  
pp. 458-461
Author(s):  
Pu Yu Duan ◽  
Dong Wang
Keyword(s):  
Plane Surface ◽  
Impedance Matching ◽  
Dipole Antenna ◽  
Cylinder Surface ◽  
Uhf Rfid ◽  
Logistics Industry ◽  
Rfid Tag ◽  
The Impact ◽  
Meander Line ◽  
Read Range

Cylinder is a common object and used in logistics industry, such as liquid container like wine. The performance of tags that are used on these objects declines, especially the read range and the radiation pattern of the tag. In this paper, a type of UHF tag antenna directly mountable on the cylinder surface. In order to reduce the impact of the deformation, the tag is designed with meander-line but not symmetrical. Antenna is combined with T-matching network to ensure good impedance matching. Compared with the basic dipole antenna tag both cylinder and plane surface, we can get the prominent feature of the tag proposed in this paper.

scholarly journals A Compact Broad-band UHF RFID Tag Loaded with Triangular SRR Arrays

2018 ◽  
Vol 7 (2) ◽  
pp. 48-52 ◽  
Author(s):  
A. K. K. John ◽  
T. Mathew
Keyword(s):  
Impedance Matching ◽  
Broad Band ◽  
Dipole Antenna ◽  
The Other ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Read Range ◽  
Compact Planar

A novel compact planar UHF RFID tag with broadband operation and enhanced read range characteristics are presented. The structure of the tag consists of a T- matched dipole antenna whose arms are orthogonally loaded with Triangular SRR arrays. Triangular SRR arms loaded in the structure produce compactness and good impedance matching which is needed for maximizing the read range. The measured results shows that the projected tag shows a highest read range of 9.6 meter in the European UHF RFID band of 866 MHz and significantly better read range in the other UHF RFID bands in the 860-930 MHz range . Measured read range differences over the azimuth and elevation angular ranges are also suggested.

Read Range Sensitivity of Embedded RFID Tags in Commercial Tires

2016 ◽  
Vol 44 (2) ◽  
pp. 120-129
Author(s):  
Terence E. Wei ◽  
Paul B. Wilson
Keyword(s):  
High Sensitivity ◽  
Dipole Antenna ◽  
Rfid Tags ◽  
Dipole Antennas ◽  
Transit Systems ◽  
Rubber Compounds ◽  
Reduced Costs ◽  
The Difference ◽  
Steel Body ◽  
Read Range

ABSTRACT Radiofrequency (RFID) identification is a commonly used technology in retail stores, highway toll payment transceivers, payment cards for mass transit systems, electronic access cards for office buildings, and many other applications. The use of RFID in tires can increase efficiencies of tracking manufacturing, distribution, retreading, and tire usage, resulting in reduced costs. Previous research has shown difficulty in obtaining a useful read range from RFID tags in tires, although most of these studies have involved passenger car tires that do not have steel body plies. In this work, commercially available RFID tags with helical dipole antennas were embedded into commercial tires of four different sizes. The difference in size between the largest and smallest tire used was 10%. These commercial tires have steel belts as well as steel body plies. Other than dimensions, all of the tires had identical tire constructions and used the same rubber compounds. Identical tags were embedded at the same location in all tires. Measurements were performed on multiple tires per size, which show that the read range of the helical dipole antenna has a high sensitivity to tire size. The sensitivity of the read range due to tire size is undesirable, because it means that sufficient read range may not be achieved in all tire constructions with the same tag.

scholarly journals Different Substrate Materials for Designing a Passive UHF RFID Tag Antenna

2019 ◽  
Vol 8 (9S) ◽  
pp. 572-580 ◽  
Keyword(s):  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Dipole Antenna ◽  
Antenna Gain ◽  
Rfid Technology ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Frequency Identification ◽  
Read Range

The Radio Frequency Identification (RFID) technology has been increasingly used for various application such as tracking of products, smart cards, identification, item management, security etc. In this paper, the performance parameter of the passive UHF RFID tag antenna has been studied for four different substrate materials viz., FR4 epoxy, PET, Rogers 4350, Taconic TLY materials. A simple meandered dipole antenna has been designed using a T-match stub for impedance matching of the tag antenna with the attached RFID chip. These different substrates are then designed separately, for the same antenna geometry. The effect of using these substrates on RFID tag antenna parameters such as reflection coefficient, antenna gain, VWSR, radiation pattern, impedance, ease of optimization level, read range, and radiation efficiency are then observed.

scholarly journals Design and Characterization of a Compact Single Layer Modified S-Shaped Tag Antenna for UHF-RFID Applications

2019 ◽  
Vol 8 (1) ◽  
pp. 59-65 ◽  
Author(s):  
M. A. Ennasar ◽  
I. Aznabet ◽  
O. EL Mrabet ◽  
M. Essaaidi
Keyword(s):  
Low Cost ◽  
Impedance Matching ◽  
Single Layer ◽  
Center Frequency ◽  
Uhf Rfid ◽  
The North ◽  
Compact Size ◽  
Low Permittivity ◽  
Rfid Applications ◽  
Read Range

In this paper, we report the design of a new compact single layer modified S-shaped tag antenna for UHF-RFID applications. To achieve a compact size of 51×34 mm2 for this tag antenna, the technique of using S shaped strip is applied, and by further adding a pair of equilateral triangular stubs into this structure, good impedance matching can be obtained at 915 MHz, which is the center frequency of the North-American UHF-RFID band (902 to 928 MHz). Besides exhibiting acceptable 5m read range in free space at 915 MHz, the proposed design shows a read range of about 4.5 when mounted on a metallic object (200 ×30 cm2) separated by spacer foam of thickness 1 cm. Furthermore, the proposed design shows a reasonable read ranges when it is mounted on different dielectrics with low permittivity. The proposed design has a simple configuration, low cost, acceptable read range, and can work on various background materials.  

scholarly journals Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Lingfei Mo ◽  
Chenyang Li
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Rfid Tags ◽  
Manufacturing Cost ◽  
Planar Antenna ◽  
Double Loop ◽  
Uhf Rfid ◽  
Rfid Tag

Planar UHF RFID antimetal tag can be widely used for the metallic products or packages with metal material inside. A double loop inductive feed planar patch antenna is proposed for UHF RFID tag mounted on metallic objects. Compared to conventional microstrip antennas or PIFA antennas used for UHF RFID tags, the double loop inductive feed patch antenna has a planar structure, with no short via or short wall, which could decrease the manufacturing cost of the tags. The double loop inductive feed structure also increases the radiation performance of the planar antenna. Moreover, the double loop inductive feed structure makes the impedance of the patch antenna be tuned easily for conjugate impedance matching.

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