Zeitschriftenartikel: „RFID UHF passive“

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Gigac, Juraj, Mária Fišerová, Maroš Kováč, and Svetozár Hegyi. "PASSIVE UHF RFID TAGS WITH THERMAL-TRANSFER-PRINTED ANTENNAS." Materiali in tehnologije 55, no. 2 (2021): 277–82. http://dx.doi.org/10.17222/mit.2020.184.

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Papers for the thermal transfer printing of UHF RFID antennas were prepared by coating and calendering. Real and imaginary components of the impedance of the UHF RFID antennas depended on their design, coating composition and conditions of paper calendering. Passive UHF RFID tags were constructed from antennas and chips whose real and imaginary components of impedance in the 860–960 MHz frequency band were at approximately the same level. The communication quality of passive UHF RFID tags was evaluated by measuring the reading range using the designed UHF RFID reading unit. The reading range of experimental UHF RFID tags with printed antennas on paper and commercial UHF RFID tags with chemically etched antennas on a PET film were identical in the 860 MHz frequency.

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Hu, Shengbo, Bing Si, Heng Shu, and Jinrong Mo. "Power Transmission of UHF Passive Embedded RFID in Tires." International Journal of Antennas and Propagation 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/897041.

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UHF passive RFID tags embedded in tires have a deep impact on tire life cycle management and tire monitoring. In this work, we present the power transmission of UHF passive embedded RFID in tires. In UHF passive embedded RFID systems in tires, the bidirectional radio link between reader and tags goes through air and tires. The total path loss contains reflection loss at tire-air boundaries and attenuation loss in the tires. The power transmission is based on the permittivity of tires and tire-air boundary conditions. We give an OCP method for measuring the permittivity of tires. By analyzing the radio link for UHF passive RFID, we establish a model of wave propagation of UHF embedded RFID in tires and make numerical analyses. Numerical analyses show that the error of the OCP methods for measuring the permittivity of tires is small, the parallel polarization and normal incidence of wave are chosen for improving the performance of the UHF embedded RFID in tires, and distance is chosen to keep power transmission function from locating valley.

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Muzamane, Helio Augusto, and Hsin-Chin Liu. "Experimental Results and Performance Analysis of a 1 × 2 × 1 UHF MIMO Passive RFID System." Sensors 21, no. 18 (2021): 6308. http://dx.doi.org/10.3390/s21186308.

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Ultra-high frequency (UHF) multiple input multiple output (MIMO) passive radio frequency identification (RFID) systems have attracted the attention of many researchers in the last few years. The system modeling and theoretical performance analysis of these systems have been well investigated and revealed in many studies, yet the system prototype and the corresponding experimental results are scarce. In this study, measurements of a 1 × 2 × 1 UHF passive RFID system, including a MIMO UHF passive RFID tag prototype and its corresponding software-defined radio-based reader, taken in a microwave anechoic chamber, are presented. The experimental results are compared with theoretical values and computer simulations. The overall results demonstrate the consistency and the feasibility of UHF MIMO passive RFID systems.

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Zhang, Jian, Senthilkumar CG Periaswamy, Shiwen Mao, and Justin Patton. "Standards for Passive UHF RFID." GetMobile: Mobile Computing and Communications 23, no. 3 (2020): 10–15. http://dx.doi.org/10.1145/3379092.3379098.

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Sakonkanapong, Arnon, and Chuwong Phongcharoenpanich. "Near-Field HF-RFID and CMA-Based Circularly Polarized Far-Field UHF-RFID Integrated Tag Antenna." International Journal of Antennas and Propagation 2020 (April 24, 2020): 1–15. http://dx.doi.org/10.1155/2020/6427157.

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This research proposes an integrated high-frequency (HF) and ultrahigh-frequency (UHF) passive radio frequency identification (RFID) tag antenna for near-field (13.56 MHz) and far-field (920–925 MHz) communication. This tag antenna is advantageous for the applications with lossy material in the near-field communication and mitigates polarization loss in the far-field communications. The HF-RFID tag antenna is of square spiral structure, and the circularly polarized UHF-RFID structure consists of a square loop radiator with cascading loop feeding and shorted stub. The structure of HF-RFID tag antenna situated inside the circularly polarized UHF-RFID tag can avoid the significant effect of the near-field magnetic coupling from the square loop. The UHF-RFID tag antenna is realized by using characteristic mode analysis for wideband circular polarization. The HF-RFID structure is conjugate-matched with NXP NT3H2111 chip, and the UHF-RFID structure is conjugate-matched with NXP G2X chip. Simulations were carried out, and an antenna prototype was fabricated. The experimental results reveal that the radiation pattern of UHF-RFID tag antenna is bidirectional with a gain of 0.31 dBic. The impedance bandwidth covers the frequency range of 903–944 MHz, and the axial ratio in boresight direction at 922.5 MHz is 1.67 dB, with the axial ratio bandwidth over 863–938 MHz. The maximum near-field and far-field reading ranges are 4.9 cm and 8.7 m. The proposed integrated dual-band passive tag antenna is operationally ideal for HF-RFID and UHF-RFID applications.

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Byondi, Franck Kimetya, and Youchung Chung. "Longest-Range UHF RFID Sensor Tag Antenna for IoT Applied for Metal and Non-Metal Objects." Sensors 19, no. 24 (2019): 5460. http://dx.doi.org/10.3390/s19245460.

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This paper presents a passive cavity type Ultra High Frequency (UHF) Radio Frequency Identification (RFID) tag antenna having the longest read-range, and compares it with existing long-range UHF RFID tag antenna. The study also demonstrates mathematically and experimentally that our proposed longest-range UHF RFID cavity type tag antenna has a longer read-range than existing passive tag antennas. Our tag antenna was designed with 140 × 60 × 10 mm3 size, and reached 26 m measured read-range and 36.3 m mathematically calculated read-range. This UHF tag antenna can be applied to metal and non-metal objects. By adding a further sensing capability, it can have a great benefit for the Internet of Things (IoT) and wireless sensor networks (WSN).

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He, Wei, Wei Hua Sun, Jun Ling Ma, and Shi Cheng Li. "A Confidential Passive UHF Reader with Cryptographic Technique." Applied Mechanics and Materials 303-306 (February 2013): 1818–21. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.1818.

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In this paper, a passive UHF reader design with cryptographic technique SM2 is presented. By designing board compatibility of security module, RFID control module, RF module, communications interface, the passive UHF reader can both operate at common mode and security mode. This design constructs a suitable candidate for reliability, integrity, security of information transmission of RFID application in special field of internet of things.

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He, Han, Lauri Sydänheimo, Johanna Virkki, and Leena Ukkonen. "Experimental Study on Inkjet-Printed Passive UHF RFID Tags on Versatile Paper-Based Substrates." International Journal of Antennas and Propagation 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/9265159.

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We present the possibilities and challenges of passive UHF RFID tag antennas manufactured by inkjet printing silver nanoparticle ink on versatile paper-based substrates. The most efficient manufacturing parameters, such as the pattern resolution, were determined and the optimal number of printed layers was evaluated for each substrate material. Next, inkjet-printed passive UHF RFID tags were fabricated on each substrate with the optimized parameters and number of layers. According to our measurements, the tags on different paper substrates showed peak read ranges of 4–6.5 meters and the tags on different cardboard substrates exhibited peak read ranges of 2–6 meters. Based on their wireless performance, these inkjet-printed paper-based passive UHF RFID tags are sufficient for many future wireless applications and comparable to tags fabricated on more traditional substrates, such as polyimide.

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Zhang, Guofeng, Dehua Wu, Jingdun Jia, et al. "Architecture Characteristics and Technical Trends of UHF RFID Temperature Sensor Chip." Active and Passive Electronic Components 2018 (October 1, 2018): 1–8. http://dx.doi.org/10.1155/2018/9343241.

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The integration of temperature sensor (TS) and UHF RFID technology has attracted wide attention theoretically and experimentally. The architecture, power consumption, temperature measurement range, accuracy, and communication distance are key indicators of the performance of UHF RFID temperature sensor chip (RID-TSC). This work aims to provide a clearer view of the development of UHF RFID-TSC integration technology. After a systematic analysis of the characteristics of ADC, TDC, and FDC used in an integrated TS, the key low-power technologies under different architectures are summarized. Through the observation of the latest researches and commercial products, the development trend of UHF RFID-TSC technology is obtained, including on-chip and off-chip coordination, multiprotocol and multifrequency support, passive wireless sensor intelligence, miniaturization, and concealment.

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Purandare, Aditya, Yihang Chu, Deepak Kumar, Saikat Mondal, Andrew J. Mason, and Prem Chahal. "Design and Implementation of Harmonic RFID Based on Conventional UHF System." International Symposium on Microelectronics 2021, no. 1 (2021): 000176–80. http://dx.doi.org/10.4071/1085-8024-2021.1.000176.

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Abstract There has been growing interest in the use of passive harmonic RFIDs for diverse range of applications. Conventional RFIDs are prone to self-jamming and multipath interference, and these challenges can be mitigated using the harmonic RFID design. Recently several harmonic RFID designs have been demonstrated. However, there are many designs related, packaging and intellectual property challenges associated with new tag designs. It has been well known that conventional RFIDs produce harmonic content, which is typically suppressed to reduce background noise. Previous experiments have demonstrated that the harmonics generated by conventional RFIDs can be utilized to enhance their performance. In this paper, an RFID chip is characterized for the generation of harmonic frequencies. This is carried out by designing a high frequency board that contains calibration structures along with structures to characterize the RFID chip using a one port network. An equivalent model is then developed, which in turn is used to design a dual band antenna that works at the fundamental and harmonic frequencies. In addition, the conventional RFID interrogator is modified to accommodate the measurement of harmonics generated by the RFIDs. A complete harmonic tag system is designed and implemented, and an example application of harmonic RFID is demonstrated. Here, the harmonic RFID tag is used in an industrial setting where there is large clutter (large reflections from metal structures).

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Dabhade, Rishit Hemant. "RFID Based Marathon Tracking System." International Journal for Research in Applied Science and Engineering Technology 9, no. 10 (2021): 1207–12. http://dx.doi.org/10.22214/ijraset.2021.38606.

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Abstract: The most daunting task in any type of marathon running event is the correct, impartial tracking and positioning of participating athletes. Notwithstanding the tens of thousands of marathon runners congregating at the starting point of the race, this system accurately tracks the chip-time of each and every runner thus providing the organizers with fair and exact results at the end of the event. All this technological leap in race timing is only possible via Radio-frequency identification (RFID). This cost-effective marathon tracking system implements disposable passive RFID tags on the bibs of the marathon runners to track their chip-time as soon as they pass the starting point of the race where the UHF RFID reader is positioned. Keywords: RFID, Marathon, Arduino Uno, UHF, Passive RFID tag, chip-time.

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Janeczek, Kamil, Małgorzata Jakubowska, Grażyna Kozioł, and Piotr Jankowski-Mihułowicz. "Passive UHF RFID-Enabled Sensor System For Detection Of Product’S Exposure To Elevated Temperature." Metrology and Measurement Systems 20, no. 4 (2013): 591–600. http://dx.doi.org/10.2478/mms-2013-0050.

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Abstract Temperature change is one of key factors which should be taken into account in logistics during transportation or storage of many types of goods. In this study, a passive UHF RFID-enabled sensor system for elevated temperature (above 58°C) detection has been demonstrated. This system consists of an RFID reader and disposable temperature sensor comprising an UHF antenna, chip and temperature sensitive unit. The UHF antenna was designed and simulated in an IE3D software. The properties of the system were examined depending on the temperature level, type of package which contains the studied objects and the type of antenna substrate.

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Kolarovszki, Peter, Zuzana Kolarovszká, Dragan Perakovic, and Marko Periša. "Laboratory Testing of Active and Passive UHF RFID Tags." Transport and Telecommunication Journal 17, no. 2 (2016): 144–54. http://dx.doi.org/10.1515/ttj-2016-0014.

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Abstract This article deals with research of laboratory testing by active and passive UHF tags and therefore mutual coexistence of active and passive RFID technology, which is a part of automatic identification and data capture. In this article we would like to describe an identification of transport unit based on passive technology and also by active technology. We would like to specify, how this technologies can work together and in which application focuses on postal and logistics. All results are verified by measurement in our AIDC laboratory, which is located at the University of Žilina. Our research contains different types of measurements in order to point out the possible influence of these two technologies. The results of our research bring the new point of view and indicate the ways using of UHF RFID technology in postal and logistics applications. At the end of this article is characterized the utilization of the RFID technology in postal logistics chain by using both passive and active technologies.

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Zainud-Deen, Saber Helmy, Hend Abd El-Azem Malhat, and Kamal Hassan Awadalla. "FRACTAL ANTENNA FOR PASSIVE UHF RFID APPLICATIONS." Progress In Electromagnetics Research B 16 (2009): 209–28. http://dx.doi.org/10.2528/pierb09051506.

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Kumar, Arun, Davinder Parkash, and M. V. Kartikeyan. "PLANAR ANTENNAS FOR PASSIVE UHF RFID TAG." Progress In Electromagnetics Research B 19 (2010): 305–27. http://dx.doi.org/10.2528/pierb09121609.

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Escobedo, Pablo, Miguel Carvajal, Luis Capitán-Vallvey, José Fernández-Salmerón, Antonio Martínez-Olmos, and Alberto Palma. "Passive UHF RFID Tag for Multispectral Assessment." Sensors 16, no. 7 (2016): 1085. http://dx.doi.org/10.3390/s16071085.

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Bergeret, E., J. Gaubert, P. Pannier, and P. Rizzo. "Power generation system for UHF passive RFID." Electronics Letters 42, no. 25 (2006): 1452. http://dx.doi.org/10.1049/el:20063329.

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Hsin-Chin Liu, Wang-Chi Lin, Ming-Yuh Lin, and Min-Hsiang Hsu. "Passive UHF RFID Tag With Backscatter Diversity." IEEE Antennas and Wireless Propagation Letters 10 (2011): 415–18. http://dx.doi.org/10.1109/lawp.2011.2153173.

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Sydanheimo, L., J. Nummela, L. Ukkonen, J. McVay, A. Hoorfar, and M. Kivikoski. "Characterization of Passive UHF RFID Tag Performance." IEEE Antennas and Propagation Magazine 50, no. 3 (2008): 207–12. http://dx.doi.org/10.1109/map.2008.4563613.

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Andiia Vera, Gianfranco, Yvan Duroc, and Smail Tedjini. "Third Harmonic Exploitation in Passive UHF RFID." IEEE Transactions on Microwave Theory and Techniques 63, no. 9 (2015): 2991–3004. http://dx.doi.org/10.1109/tmtt.2015.2455495.

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Sipilä, Erja, Johanna Virkki, Lauri Sydänheimo, and Leena Ukkonen. "Experimental Study on Brush-Painted Passive RFID-Based Humidity Sensors Embedded into Plywood Structures." International Journal of Antennas and Propagation 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/1203673.

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The integration of electronics and wood is an interesting research area due to the increasing interest to add functionality into various wooden products. The passive RFID-based humidity sensor tag prototype, presented in this paper, is fabricated directly on plywood substrate to be embedded into wooden structures, by using brush-painting and photonic sintering of cost-effective silver ink. To the best of our knowledge, this is the first demonstration of brush-painted antennas as sensor elements. The developed sensor tag is fully passive and small in size, meaning it can be permanently enclosed into wooden structures. In addition, the sensor tag has all the functionalities of an ordinary passive UHF RFID tag, and a peak read range of about 10 meters. The sensor performance was evaluated in normal room conditions, after two 100% relative humidity tests, and after drying in normal room conditions for 9 days. According to the results, the fabricated UHF RFID-based humidity sensor tags have a great potential to be utilized in humidity sensing applications, and also in normal automatic identification and supply chain control of various wooden products. In addition, the first results of more cost-effective brush-painted copper UHF RFID tags on plywood substrate are presented.

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Ascher, A., M. Lehner, M. Eberhardt, and E. Biebl. "Improving the range of UHF RFID transponders using solar energy harvesting under low light conditions." Advances in Radio Science 13 (November 3, 2015): 81–86. http://dx.doi.org/10.5194/ars-13-81-2015.

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Abstract. The sensitivity of passive UHF RFID transponders (Radio Frequency Identification) is the key issue, which determines the maximum read range of an UHF RFID system. During this work the ability of improving the sensitivity using solar energy harvesting, especially for low light conditions, is shown. To use the additional energy harvested from the examined silicon and organic solar cells, the passive RFID system is changed into a semi-active one. This needs no changes on the reader hardware itself, only the used RFIC (Radio Frequency Integrated Circuit) of the transponder has to possess an additional input pin for an external supply voltage. The silicon and organic cells are evaluated and compared to each other regarding their low light performance. The different cells are examined in a shielded box, which is protected from the environmental lighting. Additionally, a demonstrator is shown, which makes the measurement of the extended read range with respect to the lighting conditions possible. If the cells are completely darkened, the sensitivity gain is ascertained using high capacity super caps. Due to the measurements an enhancement in range up to 70 % could be guaranteed even under low light conditions.

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Virtanen, J., F. Yang, L. Ukkonen, A. Z. Elsherbeni, A. A. Babar, and L. Sydänheimo. "Dual port temperature sensor tag for passive UHF RFID systems." Sensor Review 34, no. 2 (2014): 154–69. http://dx.doi.org/10.1108/sr-12-2011-681.

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Purpose – The purpose of this paper is to develop a novel totally passive, wireless temperature sensor tag based on ultra high-frequency (UHF) radio frequency identification (RFID) technology. The temperature-sensing functionality is enabled by using distilled water embedded in the tag antenna substrate. The novel sensor tag is designed to provide wireless temperature readings comparable to a commercial thermocouple thermometer even in environments with high levels of interference, such as reflections. The structure of the novel sensor tag is aimed to increase its usability by minimizing user-created errors and to simplify the measurement procedure. Design/methodology/approach – The sensor tag is based on a dual port sensing concept in which two ports are used to obtain sensor readings. By utilizing two ports instead of one, the effects of environmental interference, tag-reader antenna orientation and distance can be effectively minimized. Two alternative methods of acquiring the sensor reading from the operating characteristics of the two ports are presented and discussed. Findings – Temperature measurements in practical scenarios show that by utilizing the dual port sensing concept, the developed tag produces temperature readings wirelessly which are comparable to readings from a commercial thermocouple thermometer. Research limitations/implications – The concept of dual port sensing was shown and two alternative methods on extracting sensor readings from the differences in the port operating characteristics were introduced and discussed. In this paper, the dual port sensing concept is utilized in creating a temperature sensor tag; however, the same concept can be utilized in a variety of passive wireless sensors based on UHF RFID technology. This enables a new approach in designing accurate, easy to use and easily integrable passive sensors. The dual port sensing concept is in its early stages of development; its accuracy could be improved by developing more advanced data post-processing techniques. Practical implications – The accuracy of a passive dual port UHF RFID-enabled temperature sensor tag is proven to be sufficient in many applications. This indicates that other sensor types utilizing the dual port sensing concept can reach high levels of accuracy as well. Furthermore, the passive RFID-enabled sensors based on the dual port sensing concept are superior in usability versus sensor tags equipped only with a single port. Therefore, dual port sensing concept in passive UHF RFID-enabled sensor tags could make such sensors more attractive commercially and lead to truly widespread ubiquitous sensing and computing. Originality/value – This paper presents a novel passive, wireless temperature sensor tag for UHF RFID systems. The sensor tag utilizes a new structure which allows tight integration of two ports and two tag antennas. The accuracy of the developed tag is confirmed throughout measurements and it is found comparable to the accuracy of commercial thermometers in practical measurement scenarios. Moreover, the paper presents a dual port sensing concept and two readout methods based on the concept which are aimed to increase the accuracy and usability of all kinds of UHF RFID-enabled sensor tags.

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De Donno, Danilo. "Unconventional UHF RFID Tags with Sensing and Computing Capabilities." Journal of Communications Software and Systems 10, no. 2 (2014): 83. http://dx.doi.org/10.24138/jcomss.v10i2.128.

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The design of fully-passive UHF RFID tags preserving cost-effectiveness, yet supplying augmented capabilities, represents an ambitious and stimulating challenge, as such devices would pave the way to a large class of applications where identification, computation, automatic cognition, and wireless sensing are required. In this work, two solutions are proposed. The former, named RAMSES, is optimized for RFID-based sensing and relies on a novel approach exploiting a new-generation I2C-UHF RFID chip. RAMSES is able to write sensor data into the EPC and communicate up to 5 m of distance from a conventional UHF RFID Class-1 Generation-2 (Gen2) reader. The latter solution, named SPARTACUS, renounces part of this long operating range in exchange for additional computing capabilities enabling an increased interaction with RFID readers. SPARTACUS represents the first example in literature of RFID device embedding sensing/actuation functionalities, distributed computation, and fully bidirectional communication with the reader. Satisfactory operating range, sensing, computation, data storage, and cost-effectiveness are the main strengths making the proposed devices definitely suitable for a wide array of novel and unconventional RFID applications.

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Dang, Qi, Xi Wei Wang, Jing Lin Guo, and Xue Song Tong. "Study on Electronic License System and Operation." Applied Mechanics and Materials 556-562 (May 2014): 2198–201. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2198.

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Electronic license operating system is mainly including passive electronic license applications and information technology systems integration of physical construction ideas. This paper introduces a practical application of the anti-metal UHF RFID tag antenna, relying on the existing license plate, the metal plate as part of the antenna to solve UHF RFID tag for metal surface problems. Establishment of cloud computing, combining sea calculation the physical integration of information systems to meet the needs of car networking operations.

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Wang, Honggang, Ruixue Yu, Ruoyu Pan, Mengyuan Liu, Qiongdan Huang, and Jingfeng Yang. "Fast tag identification for mobile RFID robots in manufacturing environments." Assembly Automation 41, no. 3 (2021): 292–301. http://dx.doi.org/10.1108/aa-11-2020-0182.

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Purpose In manufacturing environments, mobile radio frequency identification (RFID) robots need to quickly identify and collect various types of passive tag and active tag sensor data. The purpose of this paper is to design a robot system compatible with ultra high frequency (UHF) band passive and active RFID applications and to propose a new anti-collision protocol to improve identification efficiency for active tag data collection. Design/methodology/approach A new UHF RFID robot system based on a cloud platform is designed and verified. For the active RFID system, a grouping reservation–based anti-collision algorithm is proposed in which an inventory round is divided into reservation period and polling period. The reservation period is divided into multiple sub-slots. Grouped tags complete sub-slot by randomly transmitting a short reservation frame. Then, in the polling period, the reader accesses each tag by polling. When tags’ reply collision occurs, the reader tries to re-query collided tags once, and the pre-reply tags avoid collisions through random back-off and channel activity detection. Findings The proposed algorithm achieves a maximum theoretical system throughput of about 0.94, and very few tag data frame transmissions overhead. The capture effect and channel activity detection in physical layer can effectively improve system throughput and reduce tag data transmission. Originality/value In this paper, the authors design and verify the UHF band passive and active hybrid RFID robot architecture based on cloud collaboration. And, the proposed anti-collision algorithm would improve active tag data collection speed and reduce tag transmission overhead in complex manufacturing environments.

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GIGAC, JURAJ, MÁRIA FIŠEROVÁ, SVETOZÁR HEGYI, and MAROŠ KOVÁČ. "QUALITY EVALUATION OF UHF RFID ANTENNAS AND PASSIVE TAGS ON PAPER SUBSTRATES." WOOD RESEARCH 68(1) 2023 68, no. 1 (2023): 183–99. http://dx.doi.org/10.37763/wr.1336-4561/68.1.183199.

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The effect of antenna design modification, paper substrates and relative electrical permittivity of background materials on the reflection coefficient of UHF RFID antennas was studied. Simulation software was used to modify the design and calculate the reflection coefficient of the antennas. By modifying the coupling of the dipole with the induction loop of the antennas, areduction of the simulated reflection coefficient was achieved compared to thecommercial antenna. The positive effect of antenna modification was also confirmed by measuring thereflection coefficient of antennas printed on paper by thermal transfer printing, placed on extruded polystyrene and particle board. The reflection coefficient of the modified antennas was lower when placed on extruded polystyrene, whose relative electrical permittivity was lower than particle board. After installing the memory chip to the antennas printed on paper and paperboard, the identification, reading and recording range of passive UHF RFID tags were measured after they were placed on thicker paperboard, extruded polystyrene and particle board. The positive effect of antenna modification on improving the communication quality of passive UHF RFID tags placed on background materials with a relative electrical permittivity of 2.4 to 6.7 wasconfirmed.

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Mun, Byeonggwi, Yonghyun Yoon, Hyunwoo Lee, Hark-Yong Lee, and Byungje Lee. "A Compact Dual-Band RFID Tag Antenna Mountable on Metallic Objects." International Journal of Antennas and Propagation 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/131908.

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A compact (50 × 50 × 4 mm3) dual-band radio frequency identification (RFID) tag antenna mountable on metallic objects is proposed for the ultra-high frequency (UHF) band (917∼923.5 MHz) and the microwave (MW) band (2.4∼2.45 GHz). With the proximity-coupled feed loop, the proposed antenna consists of two symmetric planar inverted-F antenna (PIFA) elements for the UHF band passive tag and a meander microstrip patch antenna for the MW band active tag. The performance of the proposed antenna is verified by mounting it on the different sizes of the metallic object. Furthermore, the passive tag antenna in the UHF band furthermore may be used for energy harvesting techniques to improve the lifetime of the active tag in the MW band. The measured maximum read range is 5.50 m in the UHF band and 14.15 m in the MW band when the proposed tag antenna is mounted on the metallic objects. The total efficiency for all operating frequency bands is higher than 50%. High isolation (>12 dB) between tag antennas in the UHF band and the MW band is achieved.

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Patrono, Luigi. "Integrating Passive UHF RFID Tags with WSN Nodes: Challenges and Opportunities." Journal of Communications Software and Systems 10, no. 2 (2014): 99. http://dx.doi.org/10.24138/jcomss.v10i2.130.

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Radio Frequency Identification (RFID) and Wireless Sensor Networks (WSNs) have received an ever-increasing attention in recent years, mainly because they represent two of the most important technologies enabling the Internet of Things vision. Although designed originally with different objectives, WSN and RFID represent two complementary technologies whose integration might increase their functionalities and extend their range of applications. However, important technological issues must still be solved in order to fully exploit the potentialities offered by such integration. In this work, an innovative RFID-WSN integration approach is presented and validated. It relies on the interconnection of a new-generation, long-range, EPCglobal Class-1 Generation-2 Ultra-High-Frequency (UHF) RFID tag with a commercial WSN node via the I2C interface. Experimental results have demonstrated the effectiveness of the proposed approach compared to existing solution in the literature. Interesting application scenarios enabled by the proposed RFID-WSN integration approach are briefly summarized at the end of the paper.

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Tajin, Md Abu Saleh, Chelsea E. Amanatides, Genevieve Dion, and Kapil R. Dandekar. "Passive UHF RFID-Based Knitted Wearable Compression Sensor." IEEE Internet of Things Journal 8, no. 17 (2021): 13763–73. http://dx.doi.org/10.1109/jiot.2021.3068198.

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31

Xie, Ya Juan, and Cai Feng Liu. "The Comparison of Passive UHF RFID Tag Chip." Advanced Materials Research 1030-1032 (September 2014): 1247–50. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.1247.

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This paper introduces the characteristics of passive uhfrfid tag chip through enumerating the contrast method, including alien higgs-4, nxp g2xm and impinj monza5. And the paper explains the chip impedance, memory allocation in detail. The conclusion is that the performance exist difference between each chip. Understanding the performance of the chip is helpful to design a suitable antenna. To provide reference for uhfrfid label antenna design.

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Fernández-Salmerón, José, Almudena Rivadeneyra, Fernando Martínez-Martí, Luis Capitán-Vallvey, Alberto Palma, and Miguel Carvajal. "Passive UHF RFID Tag with Multiple Sensing Capabilities." Sensors 15, no. 10 (2015): 26769–82. http://dx.doi.org/10.3390/s151026769.

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33

Virtanen, Juha, Toni Bjorninen, Leena Ukkonen, and Lauri Sydanheimo. "Passive UHF Inkjet-Printed Narrow-Line RFID Tags." IEEE Antennas and Wireless Propagation Letters 9 (2010): 440–43. http://dx.doi.org/10.1109/lawp.2010.2050050.

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34

Ziai, Mohamed Ali, and John C. Batchelor. "Temporary On-Skin Passive UHF RFID Transfer Tag." IEEE Transactions on Antennas and Propagation 59, no. 10 (2011): 3565–71. http://dx.doi.org/10.1109/tap.2011.2163789.

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35

Babar, Abdul Ali, Sabina Manzari, Lauri Sydanheimo, Atef Z. Elsherbeni, and Leena Ukkonen. "Passive UHF RFID Tag for Heat Sensing Applications." IEEE Transactions on Antennas and Propagation 60, no. 9 (2012): 4056–64. http://dx.doi.org/10.1109/tap.2012.2207045.

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36

Occhiuzzi, Cecilia, and Gaetano Marrocco. "Constrained-Design of Passive UHF RFID Sensor Antennas." IEEE Transactions on Antennas and Propagation 61, no. 6 (2013): 2972–80. http://dx.doi.org/10.1109/tap.2013.2250473.

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37

Delichatsios, Stefanie Alki, Daniel W. Engels, Leena Ukkonen, and Lauri Sydanheimo. "Albano multidimensional UHF passive RFID tag antenna designs." International Journal of Radio Frequency Identification Technology and Applications 1, no. 1 (2006): 24. http://dx.doi.org/10.1504/ijrfita.2006.010702.

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38

Montanaro, Teodoro, Ilaria Sergi, Andrea Motroni, et al. "An IoT-Aware Smart System Exploiting the Electromagnetic Behavior of UHF-RFID Tags to Improve Worker Safety in Outdoor Environments." Electronics 11, no. 5 (2022): 717. http://dx.doi.org/10.3390/electronics11050717.

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Recently, different solutions leveraging Internet of Things (IoT) technologies have been adopted to avoid accidents in agricultural working environments. As an example, heavy vehicles, e.g., tractors or excavators, have been upgraded with remote controls. Nonetheless, the community continues to encourage discussions on safety issues. In this framework, a localization system installed on remote-controlled farm machines (RCFM) can help in preventing fatal accidents and reduce collision risks. This paper presents an innovative system that exploits passive UHF-RFID technology supported by commercial BLE Beacons for monitoring and preventing accidents that may occur when ground-workers in RCFM collaborate in outdoor agricultural working areas. To this aim, a modular architecture is proposed to locate workers, obstacles and machines and guarantees the security of RCFM movements by using specific notifications for ground-workers prompt interventions. Its main characteristics are presented with its main positioning features based on passive UHF-RFID technology. An experimental campaign discusses its performance and determines the best configuration of the UHF-RFID tags installed on workers and obstacles. Finally, system validation demonstrates the reliability of the main components and the usefulness of the proposed architecture for worker safety.

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Ma, Zhen Zhou, Sheng Kun Yu, Hong Liu, Sha Hu, and Yang Fu. "Design of the UHF RFID Passive Tag Vibration Measurement Instrument." Advanced Materials Research 433-440 (January 2012): 3759–66. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.3759.

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According to the anti-vibration performance test requirements to the UHF RFID passive tag in the application of civil aviation luggage transport, the paper designs a vibration measurement instrument for UHF RFID passive tag. A vibration test scheme is designed based on non-resonance single-axis inertial vibration principle, which builds the mathematical model and vibration equation. Thereafter, a software ADAMS is applied to simulate the vibration performance, and the effects of motor speed, eccentric quality and spring stiffness coefficient are analyzed to provide the basis for the further manufacturing. Finally, a prototype is realized, and a vibration performance test based on piezoelectric accelerometer is proposed to obtain the performance parameters. The test shows that the parameters including vibration frequency and the maximum peak to peak vibration displacement satisfy the design requirements.

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Akbari, M., H. He, J. Juuti, M. M. Tentzeris, J. Virkki, and L. Ukkonen. "3D Printed and Photonically Cured Graphene UHF RFID Tags on Textile, Wood, and Cardboard Substrates." International Journal of Antennas and Propagation 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/7327398.

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This paper introduces 3D direct writing and microdispensing of graphene ultrahigh frequency (UHF) radio-frequency-identification (RFID) antennas on textile, wood, and cardboard substrates, subsequently cured either by conventional oven or photonically by pulsed Xenon flashes. Photonic-cured passive UHF RFID graphene tags on cardboard, wood, and textile substrates achieve read ranges of 5.4, 4.6, and 4 meters, respectively. These results are superior to those achieved by the oven-cured tags that featured read ranges of 4.8, 4.5, and 3.6 meters, respectively. This work presents the first integration of 3D printing and photonic curing of graphene antennas on low-cost versatile substrates.

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Bendavid, Ygal, Samad Rostampour, Yacine Berrabah, Nasour Bagheri, and Masoumeh Safkhani. "The Rise of Passive RFID RTLS Solutions in Industry 5.0." Sensors 24, no. 5 (2024): 1711. http://dx.doi.org/10.3390/s24051711.

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In today’s competitive landscape, manufacturing companies must embrace digital transformation. This study asserts that integrating Internet of Things (IoT) technologies for the deployment of real-time location systems (RTLS) is crucial for better monitoring of critical assets. Despite the challenge of selecting the right technology for specific needs from a wide range of indoor RTLS options, this study provides a solution to assist manufacturing companies in exploring and implementing IoT technologies for their RTLS needs. The current academic literature has not adequately addressed this industrial reality. This paper assesses the potential of Passive UHF RFID-RTLS in Industry 5.0, addressing the confusion caused by the emergence of new ’passive’ RFID solutions that compete with established ’active’ solutions. Our research aims to clarify the real-world performance of passive RTLS solutions and propose an updated classification of RTLS systems in the academic literature. We have thoroughly reviewed both the academic and industry literature to remain up to date with the latest market advancements. Passive UHF RFID has been proven to be a valuable addition to the RTLS domain, capable of addressing certain challenges. This has been demonstrated through the successful implementation in two industrial sites, each with different types of tagged objects.

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Zradziński, Patryk, Jolanta Karpowicz, Krzysztof Gryz, and Victoria Ramos. "Evaluation of SAR in Human Body Models Exposed to EMF at 865 MHz Emitted from UHF RFID Fixed Readers Working in the Internet of Things (IoT) System." Engineering Proceedings 2, no. 1 (2020): 11. http://dx.doi.org/10.3390/ecsa-7-08240.

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The aim of this ongoing study was to evaluate the specific energy absorption rate (SAR) values in the body of a person present near-fixed readers of ultra-high frequency (UHF) radio frequency identification (RFID) passive tags incorporated in real-time locating systems (RTLS), operating at a frequency range of 865–868 MHz, considering various exposure scenarios. The modelled electromagnetic field (EMF) source was a rectangular microstrip antenna designed at resonance frequency in free space at 865 MHz. The SAR values in the body exposed to EMF 5 cm away from the UHF RFID readers need consideration with respect to general public exposure limits, when the radiated power exceeds 8 W.

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Kawdungta, Supakit, Theerayut Mhunkaew, Danai Torrungrueng, and Hsi-Tseng Chou. "A Novel Antenna Design of Compact HF and UHF Passive RFID Tags with Interconnected Structure for Energy Harvesting and Tracking Systems." International Journal of RF and Microwave Computer-Aided Engineering 2024 (January 24, 2024): 1–13. http://dx.doi.org/10.1155/2024/9923732.

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We propose a new dual-band passive RFID tag antenna design by combining a rectangular spiral coil and patch-meander-line dipole with an interconnected structure. This design enables operation in high-frequency (HF) and ultra-high-frequency (UHF) RFID systems, suitable for energy harvesting and tracking applications. The simulations by the CST full-wave software demonstrate conjugate impedance matching between the tag antenna and two RFID tag chips. At 13.56 MHz (HF), the tag antenna exhibits an inductive reactance of 422.79 Ω, while at 922.5 MHz (UHF), it presents an impedance of 9.41+j174.96 Ω. The antenna generates a maximum magnetic field intensity of 0.5 A/m and omnidirectional electromagnetic fields with an antenna realized gain of -4.26 dBi at 922.5 MHz. We also analyze the impact of the tag antenna combination using numerical software. Furthermore, we fabricate a prototype tag antenna and validate its performance with RFID readers. The proposed tag antenna achieves the maximum read ranges of 11 cm and 6.9 m for the HF (13.56 MHz) and UHF (920-925 MHz) bands, respectively, accompanied by the energy harvesting of 1.48 volts at the HF band by the coupling magnetic field received by the HF antenna to the chip ST25DV04K at the output voltage pin.

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Islam, Mohammad, Touhidul Alam, Iskandar Yahya, and Mengu Cho. "Flexible Radio-Frequency Identification (RFID) Tag Antenna for Sensor Applications." Sensors 18, no. 12 (2018): 4212. http://dx.doi.org/10.3390/s18124212.

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In this paper, an inkjet-printed flexible Radio-Frequency Identification (RFID) tag antenna is proposed for an ultra-high frequency (UHF) sensor application. The proposed tag antenna facilitates a system-level solution for low-cost and faster mass production of RFID passive tag antenna. The tag antenna consists of a modified meander line radiator with a semi-circular shaped feed network. The structure is printed on photo paper using silver nanoparticle conductive ink. The generic design outline, as well as tag antenna performances for several practical application aspects are investigated. The simulated and measured results verify the coverage of universal UHF RFID band with an omnidirectional radiation pattern and a long-read range of 15 ft. In addition, the read range for different bending angles and lifetimes of the tag antenna are also demonstrated.

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Chung, Youchung, and Teklebrhan H. Berhe. "Radiation Beam Pattern Control of UHF RFID Tag Antenna Design for Automotive License Plates." Electronics 10, no. 19 (2021): 2439. http://dx.doi.org/10.3390/electronics10192439.

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This paper presents a design of a radio frequency identification (RFID) tag antenna in the ultra-high-frequency (UHF) range, which is applicable to a vehicular license plate attached to a vehicle bumper. The main goals are to first improve the identification ratio by controlling the radiation beam pattern and, second, to control the beam direction. Since every vehicle has a license plate, the available plate structure is used to design the antenna. The shape of the tag is rectangular and has a dimension of 525 mm × 116 mm, which is smaller than the typical size of standard plates, 540 mm × 120 mm, used in Europe and Korea. The fabricated tag antenna, the license plate, and the vehicular bumper are fixed by volt and nut. For vehicle tracking and identification, RFID readers are deployed on the road side. For efficient identification, a long distance passive UHF RFID license plate with a patch antenna is proposed to provide not only line-of-sight identification but also left and right beams. Unlike the general UHF tag antennas, in this paper, the patch antenna is designed to attach to the metal part of the car, the license plate holder. The beam patterns of the RFID tag antenna can be controlled by the patch antenna parameter values. The simulation result demonstrates that the proposed UHF RFID tag antenna has a beam radiation pattern as required at 920 MHz. In addition, the estimated read range of the proposed plate meets the requirement of RFID systems.

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Catarinucci, Luca, Riccardo Colella, and Luciano Tarricone. "Electromagnetic Performance Estimation of UHF RFID Tags in Harsh Contexts." Journal of Communications Software and Systems 13, no. 2 (2017): 125. http://dx.doi.org/10.24138/jcomss.v13i2.381.

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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.

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Pham, Thong Tien, Hoa Viet Nguyen, Ai Nhan Tran, Phat Tan Lam, and Chien Mau Dang. "Antennas fabrication for RFID uhf and microwave passive tags." Science and Technology Development Journal 16, no. 1 (2013): 5–14. http://dx.doi.org/10.32508/stdj.v16i1.1414.

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In this paper, the authors present several antenna structures for RFID passive tags with direct chip connection. In this study, the substrate is PET (Polyethylene terephthalate) with 80μm thickness, the conductive layer is copper with 10μm thickness and CST Microwave Studio is used for simulation. The antenna design process is described and related results are shown. The goal of this study is to achieve compact size, good matching impedance, and to increase the bandwidth and read range of the tag as much as possible. The prototypes were fabricated by sputtering technology with 1μm thickness, then thickened by electroplating technique and finally tested by hand-held reader for read range characterizations.

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Watanabe, Kota, Yuta Watanabe, Hajime Igarashi, and Hiroshi Waki. "Double antennas for passive long range UHF-band RFID." International Journal of Applied Electromagnetics and Mechanics 39, no. 1-4 (2012): 671–76. http://dx.doi.org/10.3233/jae-2012-1527.

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Watanabe, Yuta, Kota Watanabe, and Hajime Igarashi. "Pareto optimization of antennas for passive UHF-band RFID." International Journal of Applied Electromagnetics and Mechanics 39, no. 1-4 (2012): 747–52. http://dx.doi.org/10.3233/jae-2012-1538.

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Nick, T., and J. Götze. "Localization of passive UHF RFID Labels with Kalman Filter." Advances in Radio Science 10 (September 18, 2012): 119–25. http://dx.doi.org/10.5194/ars-10-119-2012.

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Abstract. Localization via Radio Frequency Identification (RFID) is frequently used in different applications nowadays. It has the advantage that next to its ostensible purpose of identifying objects via their unique IDs it can simultaneously be used for the localization of these objects. In this work it is shown how Received Signal Strength Indicator (RSSI) measurements at different antennae of a passive UHF RFID label can be combined for localization. The localization is only done based on the RSSI measurements and a Kalman Filter (KF). Because of non-linearities in the measurement function it is necessary to incorporate an Extended Kalman Filter (EKF) or an Unscented Kalman Filter (UKF) where simulations have shown that the UKF performs better than the EKF. Additionally to the selection of the filter there are different possibilities to increase the localization accuracy of the UKF: The advantages of using Reference Tags (RT) or more than one tag per trolley (relative positioning) in combination with an Unscented Kalman Filter are discussed and simulations results show that the localization error can be decreased significantly via these methods. Another possibility to increase the localization accuracy and in addition to achieve a more realistic simulation is the consideration of the angle between reader antenna and tag. Simulation results with the incorporation of different numbers of fixed antennae lead to the conclusion that this is a useful surplus in the localization.

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