scholarly journals A Bending Passive RFID Tag as a Sensor for High-Temperature Exposure

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Zahangir Khan ◽  
Xiaochen Chen ◽  
Han He ◽  
Adnan Mehmood ◽  
Johanna Virkki
Keyword(s):  
High Temperature ◽  
Cost Effective ◽  
Dipole Antenna ◽  
Low Energy ◽  
Temperature Sensitive ◽  
Uhf Rfid ◽  
High Temperature Exposure ◽  
Rfid Tag ◽  
Temperature Exposure ◽  
Read Range

This paper introduces a prototype of a low-energy high-temperature exposure sensor, which is a temperature-sensitive passive UHF RFID tag that bends forward when exposed to warm air. This “Bending Tag” design is based on a simple dipole antenna fabricated from an electro-textile material. The antenna has a 3D-printed substrate, which is constructed from a commercial Thermo Reactive Filament that gets soft when exposed to 50°C for 30 seconds, causing the tag to bend forward and curve. The sensor tag initially has a read range of more than 6 meters throughout the global UHF RFID frequency band. After bending, there is a significant decrease in the read range (to around 2–3 meters), which is caused by the changed backscattered power of the sensor tag. In an office environment, the backscattered power changes from −36 dBm to −43 dBm. The change in a sensor tag-reference tag system as dP% is approximately 70%. Based on these initial results, our bending tag can be further developed to work as a cost-effective low-energy sensor for monitoring high-temperature exposure.

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.

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

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5713
Author(s):  
Muhammad Hussain ◽  
Yasar Amin ◽  
Kyung-Geun Lee
Keyword(s):  
Radio Frequency Identification ◽  
Cost Effective ◽  
Future Internet ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Low Profile ◽  
5G Systems ◽  
Iot Devices ◽  
Passive Rfid ◽  
Read Range

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.

scholarly journals Improving the Mechanical Response of Al–Mg–Si 6082 Structural Alloys during High-Temperature Exposure through Dispersoid Strengthening

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5295
Author(s):  
Jovid Rakhmonov ◽  
Kun Liu ◽  
Paul Rometsch ◽  
Nick Parson ◽  
X.-Grant Chen
Keyword(s):  
High Temperature ◽  
Mechanical Response ◽  
Base Alloy ◽  
Aluminum Matrix ◽  
Cost Effective ◽  
Strengthening Effect ◽  
Isothermal Exposure ◽  
High Temperature Exposure ◽  
Temperature Exposure ◽  
Strength Improvement

The feasibility and efficacy of improving the mechanical response of Al–Mg–Si 6082 structural alloys during high temperature exposure through the incorporation of a high number of α-dispersoids in the aluminum matrix were investigated. The mechanical response of the alloys was characterized based on the instantaneous high-temperature and residual room-temperature strengths during and after isothermal exposure at various temperatures and durations. When exposed to 200 °C, the yield strength (YS) of the alloys was largely governed by β” precipitates. At 300 °C, β” transformed into coarse β’, thereby leading to the degradation of the instantaneous and residual YSs of the alloys. The strength improvement by the fine and dense dispersoids became evident owing to their complementary strengthening effect. At higher exposure temperatures (350–450 °C), the further improvement of the mechanical response became much more pronounced for the alloy containing fine and dense dispersoids. Its instantaneous YS was improved by 150–180% relative to the base alloy free of dispersoids, and the residual YS was raised by 140% after being exposed to 400–450 °C for 2 h. The results demonstrate that introducing thermally stable dispersoids is a cost-effective and promising approach for improving the mechanical response of aluminum structures during high temperature exposure.

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.

Creep Properties and Interfacial Microstructure of SiC Whisker Reinforced Si3N4

1989 ◽  
Vol 170 ◽  
Author(s):  
Håkan A. Swan ◽  
Colette O'meara
Keyword(s):  
High Temperature ◽  
Creep Resistance ◽  
Interfacial Microstructure ◽  
Deformation Mechanisms ◽  
Amorphous Films ◽  
Creep Tests ◽  
Creep Properties ◽  
High Temperature Exposure ◽  
Temperature Exposure

AbstractPreliminary creep tests were performed on SiC whisker reinforced and matrix Si3N4 material fabricated by the NPS technique. The material was extensively crystallised in the as received material, leaving only thin amorphous films surrounding the grains. No improvement in the creep resistance could be detected for the whisker reinforced material. The deformation mechanisms were found to be that of cavitation in the form of microcracks, predominantly at the whisker/matrix interfaces, and the formation of larger cracks. Extensive oxidation of the samples, as a result of high temperature exposure to air, was observed for the materials tested at 1375°C.

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