scholarly journals Electromagnetic Performance Estimation of UHF RFID Tags in Harsh Contexts

2017 ◽  
Vol 13 (2) ◽  
pp. 125
Author(s):  
Luca Catarinucci ◽  
Riccardo Colella ◽  
Luciano Tarricone
Keyword(s):  
Radio Frequency Identification ◽  
Cost Effective ◽  
Performance Estimation ◽  
Automatic Identification ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Electromagnetic System ◽  
Concrete Blocks ◽  
Frequency Identification ◽  
Electromagnetic Performance

Radio-Frequency Identification (RFID) technology is a consolidated example of electromagnetic system in which passive labels equipped with flexible antennas, called tags, are able to use a portion of the electromagnetic energy from the reader antennas, power-up their internal circuitry and provide the automatic identification of objects. Being fully-passive, the performance of RFID tags is strongly dependent on the context, so that the selection of the most suitable tag for the specific application becomes a key point. In this work, a cost-effective but accurate system for the over-the-air electromagnetic characterization of assembled UHF RFID tags is firstly presented and then validated through comparison with a consolidated and diffused measurement systems. Moreover, challenging use-cases demonstrating the usefulness of the proposed systems in analyzing the electromagnetic performance of label-type tags also when applied on materials on different shape or embedded into concrete blocks have been carried out.

scholarly journals Measurement system for over-the-air evaluation of UHF RFID tags quality

2016 ◽  
Vol 4 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Riccardo Colella ◽  
Luca Catarinucci ◽  
Luciano Tarricone
Keyword(s):  
Radio Frequency Identification ◽  
Cost Effective ◽  
Automatic Identification ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Wireless Power ◽  
Measurement Systems ◽  
Frequency Identification ◽  
Selection Of

Radio-frequency identification (RFID) technology is a consolidated example of wireless power transfer system in which passive electromagnetic labels called tags are able to harvest electromagnetic energy from the reader antennas, power-up their internal circuitry and provide the automatic identification of objects. Being fully passive, the performance of RFID tags is strongly dependent on the context, so that the selection of the most suitable tag for the specific application becomes a key point. In this work, a cost-effective but accurate system for the over-the-air electromagnetic characterization of assembled UHF RFID tags is firstly presented and then validated through comparison with a consolidated and diffused measurement systems. Moreover, challenging use-cases demonstrating the usefulness of the proposed systems in analyzing the electromagnetic performance of label-type tags also when applied on different material or embedded into concrete structures have been carried out.

Innovation in Field of Automatic Identification by Selected Components in the Automobile Industry

2015 ◽  
Vol 803 ◽  
pp. 223-230
Author(s):  
Peter Kolarovszki ◽  
Jiří Tengler
Keyword(s):  
Radio Frequency ◽  
Automotive Industry ◽  
Automobile Industry ◽  
Radio Frequency Identification ◽  
Special Section ◽  
Automatic Identification ◽  
Rfid Tags ◽  
Technical Equipment ◽  
Real Condition ◽  
Frequency Identification

Article provides research in field of automatic identification by selected components through radio-frequency identification technology (RFID) in conjunction with automotive industry. The ambition of our research was to achieve 100 % readability of RFID tags placed on selected component. Measurements were done at company providing signal lights for automotive industry and all results had been measured in real condition. A special section is dedicated to description of the technical equipment, used during measurements as well as their results from MySQL database.

scholarly journals Stretchable Textile Yarn Based on UHF RFID Helical Tag

Textiles ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 547-557
Author(s):  
Sofia Benouakta ◽  
Florin Doru Hutu ◽  
Yvan Duroc
Keyword(s):  
Radio Frequency Identification ◽  
Textile Yarn ◽  
Radiative Properties ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Half Wave ◽  
Present Solution ◽  
Frequency Identification ◽  
Helical Geometry

In the context of wearable technology, several techniques have been used for the fabrication of radio frequency identification (RFID) tags such as 3D printing, inkjet printing, and even embroidery. In contrast to these methods where the tag is attached to the object by using sewing or simple sticking, the E-Thread® technology is a novel assembling method allowing for the integration of the RFID tag into a textile yarn and thus makes it embeddable into the object at the fabrication stage. The current E-Thread® yarn uses a RFID tag in which the antenna is a straight half-wave dipole that makes the solution vulnerable to mechanical strains (i.e., elongation). In this paper, we propose an alternative to the current RFID yarn solution with the use of an antenna having a helical geometry that answers to the mechanical issues and keeps quite similar electrical and radiative properties with respect to the present solution. The RFID helical tag was designed and simulated taking into consideration the constraints of the manufacturing process. The helical RFID tag was then fabricated using the E-Thread® technology and experimental characterization showed that the obtained structure exhibited good performance with 10.6 m of read range in the ultra high frequency (UHF) RFID band and 10% of tolerance in terms of elongation.

scholarly journals Brush-Painting and Photonic Sintering of Copper Oxide and Silver Inks on Wood and Cardboard Substrates to Form Antennas for UHF RFID Tags

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Erja Sipilä ◽  
Johanna Virkki ◽  
Jianhua Wang ◽  
Lauri Sydänheimo ◽  
Leena Ukkonen
Keyword(s):  
Copper Oxide ◽  
Radio Frequency Identification ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Wireless Testing ◽  
Silver Ink ◽  
Frequency Identification ◽  
Remote Identification ◽  
Photonic Sintering

Additive deposition of inks with metallic inclusions provides compelling means to embed electronics into versatile structures. The need to integrate electronics into environmentally friendly components and structures increases dramatically together with the increasing popularity of the Internet of Things. We demonstrate a novel brush-painting method for depositing copper oxide and silver inks directly on wood and cardboard substrates and discuss the optimization of the photonic sintering process parameters for both materials. The optimized parameters were utilized to manufacture passive ultra high frequency (UHF) radio frequency identification (RFID) tag antennas. The results from wireless testing show that the RFID tags based on the copper oxide and silver ink antennas on wood substrate are readable from ranges of 8.5 and 11 meters, respectively, and on cardboard substrate from read ranges of 8.5 and 12 meters, respectively. These results are well sufficient for many future wireless applications requiring remote identification with RFID.

On BFSA Collision Resolution in LF, HF, and UHF RFID Networks

2015 ◽  
Vol 4 (2) ◽  
pp. 44-55
Author(s):  
Varun Bhogal ◽  
Zornitza Genova Prodanoff ◽  
Sanjay P. Ahuja ◽  
Kenneth Martin
Keyword(s):  
Radio Frequency Identification ◽  
High Frequency ◽  
Large Scale ◽  
Low Frequency ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Ceteris Paribus ◽  
Frequency Identification ◽  
Major Factors ◽  
The Cost

RFID (radio frequency identification) technology has gained popularity in a number of applications. Decreased cost of hardware components along with wide adoption of international RFID standards have led to the rise of this technology. One of the major factors associated with the implementation of RFID infrastructure is the cost of tags. RFID tags operating in the low frequency spectrum are widely used because they are the least expensive, but have a small implementation range. This paper presents an analysis of RFID performance across low frequency (LF), high frequency (HF), and ultra-high frequency (UHF) environments. The authors' evaluation is theoretical, using a passive-tag BFSA based simulation model that assumes 10 to 1,500 tags per reader and is created with OPNET Modeler 17. Ceteris paribus, the authors' results indicate that total census delay is lowest for UHF tags, while network throughput performance of LF tags is highest for large scale implementations of hundreds of tags in reader's range. A statistical analysis has been conducted on the findings for the three different sets.

scholarly journals WallSense: Device-Free Indoor Localization Using Wall-Mounted UHF RFID Tags

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 68 ◽  
Author(s):  
Liang Ma ◽  
Meng Liu ◽  
Hongjun Wang ◽  
Yang Yang ◽  
Na Wang ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Indoor Localization ◽  
Fitness Function ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Swarm Optimization ◽  
Median Error ◽  
Frequency Identification ◽  
Device Free ◽  
Extract Information

To achieve device-free indoor localization without the active participation of the users, this paper presents WallSense, a device-free indoor localization system based on off-the-shelf Radio RFID (Radio-Frequency Identification) equipment. The system deploys two orthogonal tag arrays in adjoining walls and uses the RSSI and phase information measured by RFID readers to localize the target. By differentiating the backscattered signal between adjacent tag pairs, WallSense is able to eliminate most undesirable factors and extract information directly related to the location of the target. By applying Particle Swarm Optimization (PSO) with a novel weighted fitness function and combining the localization result of two orthogonal tag arrays, the system is able to localize the target with high accuracy. Experiments show that the system is able to localize human target with 0.24 m median error. Also, WallSense has low deployment overhead and do not require the users to carry any devices.

Modified RSSI Technique for the Localization of Passive UHF RFID Tags in LOS Channels

2013 ◽  
Vol 5 (5) ◽  
pp. 645-651 ◽  
Author(s):  
Y. Duroc ◽  
G. Andia Vera ◽  
J. P. Garcia Martin
Keyword(s):  
Radio Frequency Identification ◽  
Simple Algorithm ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Unknown Parameters ◽  
Received Signal Strength Indicator ◽  
Passive Uhf Rfid ◽  
Reference Tags ◽  
Frequency Identification ◽  
Complex Propagation

This paper presents a new approach for improving the localization of passive ultra high frequency radio frequency identification (RFID) tags in line-of-sight channels using a received signal strength indicator (RSSI) technique. In practice, the complex propagation in the indoor channels and also the variability of some parameters of the RFID equipment itself introduces significant amount of errors when the operation of localization carries out the RSSI technique. Indeed, as the calculation is based on a trilateration, the incomplete knowledge of the propagation and some parameters of RFID tags leads to estimate distances which are wrong, and therefore the localization cannot be correct. In order to overcome this drawback, the proposed method takes into account the presence of unknown parameters relying on a dichotomous algorithm which includes probabilistic parameters. The presented simulation results are in good agreement with the expected theoretical results. Experimental results show that the proposed method strongly increases the accuracy of the estimated position of tags. Compared to other approaches based on the improvement of the RSSI technique, this method does not require too much complexity in terms of materials (no need for specific architecture or reference tags) and processing (fast and simple algorithm).

scholarly journals Towards Washable Wearable Antennas: A Comparison of Coating Materials for Screen-Printed Textile-Based UHF RFID Tags

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Tiiti Kellomäki ◽  
Johanna Virkki ◽  
Sari Merilampi ◽  
Leena Ukkonen
Keyword(s):  
Integrated Circuits ◽  
Radio Frequency Identification ◽  
Hard Coatings ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Coating Materials ◽  
Wearable Antennas ◽  
Frequency Identification ◽  
Fabric Surface ◽  
Screen Printed

(Radio frequency identification) RFID tags integrated into clothing enable monitoring of people without their conscious effort. This requires tags to be an unnoticeable part of clothing and comfortable to wear. In this study, RFID antennas were screen printed on two different fabrics, six different coating materials for the (integrated circuits) ICs were applied, and the reliability of these RFID tags was tested with moisture and laundry tests. Generally, glue-type coating materials were easier to handle and could be spread precisely. All the tags were operational immediately after the coatings were applied, and five of the coating materials were seen to protect the IC from detaching in the laundry. It was found that the uneven fabric surface caused discontinuities and breaks in narrow conductors, and thus hard coatings may also be needed to keep the tag from breaking in laundry.

Experimental Investigation on Tags Placement Affecting the Efficient Encoding of Multiple Passive UHF RFID Tags With Unique Identifiers

2016 ◽  
Author(s):  
Zhou Yi ◽  
Zi Qin Phua ◽  
Vitor N. B. Rangel ◽  
Johné M. Parker
Keyword(s):  
Radio Frequency Identification ◽  
Power Level ◽  
Industrial Applications ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Passive Uhf Rfid ◽  
Item Level ◽  
Frequency Identification ◽  
Speed Up ◽  
Promising Solution

Recently, the Internet of things (IoT) has emerged as a promising solution for several industrial applications. One of the key components in IoT is passive radio frequency identification (RFID) tags which do not require a power source for operations. Specifically, ultra-high frequency (UHF) tags are studied in this paper. However, due to factors such as tag-to-tag interference and inaccurate localization, RFID tags that are closely spaced together are difficult to detect and program accurately with unique identifiers. This paper investigates several factors that affect the ability to encode a specific tag with unique information in the presence of other tags, such as reader power level, tag-to-antenna distance, tag-to-tag distance and tag orientation. ANOVA results report reader power level and tag spacing, along with effect interactions power level*tag space and tag space*tag orientation to be significant at the levels investigated. Results further suggest a preliminary minimum tag-to-tag spacing which enables the maximum number of tagged items to be uniquely encoded without interference. This finding can significantly speed up the process of field programming in item-level tagging.

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