Download or read book Passive UHF RFID Tag Antenna Design Using Graphite based Conductive Papers written by Michael Kurz and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of passive ultra-high frequency (UHF) radio-frequency identification (RFID) systems has led to the annual production of RFID tags in the billions. Two graphite-based solutions developed at the Limerick Pulp and Paper Research Centre (LPPRC) were identified as possible candidates to achieve a more environmentally conscious tag with less complex manufacturing methods compared to what is currently available on the market. These materials are almost entirely composed of carbon and can be formed onto a biodegradable paper substrate using relatively simple methods. The materials’ intrinsic properties are characterized and a simulation profile is created to aid in the design of an optimized tag antenna. Conductivities of 600 S/m and 39,000 S/m are measured for the two graphite-ink and exfoliated-graphite based papers, respectively. Anechoic chamber read range measurements are performed using a commercial RFID reader. Maximum theoretical read ranges for prototype tags built using graphite-ink and exfoliated-graphite based papers are found to be 2.26 m and 6.83 m, respectively. Comparison of graphite-based tag prototypes and a commercial tag suggests that they are suitable for applications where the benefits of manufacturability and bio-degradability outweigh the disadvantage of a large antenna footprint. Six total designs with varying read ranges, complexities, sizes, and materials are found.

Download or read book Design and Optimization of Passive UHF RFID Tag Antenna for Mounting on Or Inside Material Layers written by Shuai Shao and published by . This book was released on 2015 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a first step, the effects of dielectric materials on an antenna's impedance match and radiation pattern are investigated. The detuning effect is quantified based on the theoretical frequency scaling and effective permittivity of a dielectric material of finite thickness. Using simple formulas, the operational range of a tag can be predicted without intensive full-wave simulations of different materials. Next, a spectral domain Green's function is applied to compute the antenna pattern when the tag is mounted on or inside a layered medium. The optimal placement of the tag is found based on the focusing effect that the material has on the gain pattern of the antenna. For tires, the steel ply in the sidewall of a tire looks like a periodic wire grating. The performance of an antenna placed close to a wire grating is predicted using Floquet theory. The results indicate that steel plies embedded in the tire can be utilized as a reflector to further focus the gain pattern and increase the read range of a tag. Using these design tools and theoretical analysis, several broadband RFID tag antennas are designed for multi-layered materials. A novel stretchable conductive textile (E-fiber) based tag antenna is also developed for placement in elastic materials. Prototype antennas are fabricated and embedded in a tire during the tire manufacturing process. Experimental results indicate that tags with the new antennas achieve significant improvement compared with commercially available tags.

Download or read book Antenna Design Solutions for RFID Tags Based on Metamaterial Inspired Resonators and Other Resonant Structures written by Simone Zuffanelli and published by Springer. This book was released on 2017-09-22 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes innovative design solutions for radio-frequency identification (RFID) tags and antennas. Focusing mainly on passive ultra-high-frequency (UHF)-RFID tag antennas, it examines novel approaches based on the use of metamaterial-inspired resonators and other resonant structures as radiating elements. It also offers an exhaustive analysis of the radiation properties of several metamaterial-inspired resonators such as the split ring resonator (SRR) and related structures. Further, it discusses in detail an innovative technology for the RFID tagging of optical discs, which has demonstrated a significant improvement over the state of the art and resulted in a patent. By covering the entire research cycle of theory, design/simulation and fabrication/evaluation of RFID tags and antennas, while also reporting on cutting-edge technologies, the book provides graduate students, researchers and practitioners alike with a comprehensive and timely overview of RFID systems, and a closer look at several radiating structures.

Download or read book Design of Passive UHF RFID Tag Antennas Using Metamaterial Based Structures and Techniques written by Benjamin D. Braaten and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first topic in this chapter was an introduction to RFID systems. This was followed immediately with a discussion on metamaterials and LH-propagation. Expressions for the propagation constants, phase velocity and Bloch impedance were derived and discussed. Next, several metamaterial-based antenna designs for passive RFID tags were presented. The designs offered showed that by incorporating elements found in metamaterials in the design of the antenna on a RFID tag, the antenna could be made to resonate at a much smaller dimension. The result is a compact passive RFID tag with very useful max read range values.

Download or read book Radiation Efficiency of Balanced Passive UHF RFID Dipole Tag Antennas written by Eveliina Koski and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: RFID is a technology for wireless identification of objects. More recently, much attention is paid to application areas within biomedical engineering, in which wearable tags for on-body use could provide real-time remote bio-monitoring of humans. New types of antenna materials and antenna structures are emerging to fulfil the requirements encountered within the new RFID application areas. Tag designs where the tag antenna structure is formed from conductive ink or conductive threads have been proposed as competitive materials to conventional etched copper. The new materials used to form the complex antenna materials are challenging to model accurately. In this book, a novel radiation efficiency measurement method is developed and verified for measurement of passive UHF RFID dipole tag antennas. The measurement method provides a powerful tool for characterisation of complex antenna material structures losses in practise. The acquired information can be used to optimise tag antenna material structures and to improve tag antenna performance and reliability, which is crucial for widespread use of RFID to become reality.

Download or read book Low Cost Passive UHF RFID Tag Antenna Based Sensors for Pervasive Sensing Applications written by Rahul Bhattacharyya and published by . This book was released on 2012 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the future, large-scale sensor deployment would enable many areas such as infrastructure condition monitoring and supply chain management. However, many of today's wireless sensor technologies are still too expensive to meet this need. Radio Frequency IDentification (RFID) offers good potential for the development of pervasive sensors: RFID tags have a proven track record of large-scale, highly integrated deployment for object identification in the retail and consumer goods industry. Furthermore, the last decade has seen much progress in making RFID a reliable, standardized wireless communication medium with the ability to mass produce low-cost RFID tags. My thesis introduces the concept of RFID Tag Antenna-Based Sensing (RFID TABS). In this approach, a change in the sensed parameter of interest induces a controlled change in the geometry or boundary conditions of an RFID tag's antenna. The resultant change in the tag's response signal can then be detected by an RFID reader. My approach builds upon current developments in RFID technology. For instance, the manufacturing techniques for the mass production of low-cost RFID tags can be used for pervasive tag-sensor development. My thesis examines TABS in a two-pronged approach: First, I demonstrate how three fundamental tag and reader signal properties can be used for sensing and propose three classes of TABS: -- Amplitude Modifying (AM) TABS use RFID reader transmitted power and tag response power for sensing. I illustrate proof of concept using a displacement sensor. I demonstrate that both these power metrics can be used to reliably measure structural displacement to a precision of 2.5 mm using commercial RFID tags. -- Frequency Modifying (FM) TABS relate changes in the sensed parameter to a shift in the tag's optimal operating frequency - the carrier frequency for which the tag is best tuned to respond to the reader. I demonstrate proof of concept using a temperature threshold sensor - the crossing of a design temperature threshold results in a shift in the sensor's optimal operating frequency. I demonstrate that the sensor works reliably over a 3 m read range and in different environmental conditions. -- Phase Modifying (PM) TABS use tag backscatter phase for sensing. I provide a brief summary of the factors influencing RF phase and outline the design for a PM TABS fluid level sensor that uses RFID tag response phase to detect the presence or absence of fluid in a beverage glass. I highlight the challenges in the practical implementation of this approach by demonstrating the sensitivity of RFID tag phase to three extraneous factors. Second, I introduce the concept of Non-Electric Memory to record short timescale threshold crossovers in the sensed parameter that may occur when the tag-sensor is unpowered. When information about, rather than the exact time of, the threshold occurrence is sufficient, non-electric memory provides a solution. I demonstrate how non-electric memory can be integrated into sensor design at minimal added cost. In the proof of concept of a temperature threshold sensor, I design a thermally actuated shape memory polymer switch to permanently change the electrical properties of an RFID tag when the temperature threshold is crossed. I demonstrate that the design works reliably over a read range of 3 m and is independent of the material on which the sensor is deployed. In summary, this thesis demonstrates how an RFID tag can be adapted for low cost, pervasive sensing. Sensor prototypes illustrate proof of concept in three application areas. Extensions to two other applications are also discussed.

Download or read book RFID Tag Antenna Design written by Vignesh Rajan Elangovan and published by LAP Lambert Academic Publishing. This book was released on 2014-08-05 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Radio frequency identification (RFID) technology essentially consists of the reader, tag and host computer.Since the passive RFID tag does not have its own power source, therefore, the continuous sending signal by the RFID reader's antenna through the air acting as activate the tag to send the information to the reader.This Research Presents small low cost passive UHF -RFID tag prototype has been designed and applied for metallic object it can also be used in tracing and tracking object it can be used in logistics and supply chain.The tag can modified into non-metallic application such that tag can be attached to the clothes of humans for tacking and it also can be used in identification of animals, While the tag antenna presented in this project are designed to be as simple as possible with low cost.

Download or read book Advanced Radio Frequency Identification Design and Applications written by Stevan Preradovic and published by IntechOpen. This book was released on 2011-03-22 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Frequency Identification (RFID) is a modern wireless data transmission and reception technique for applications including automatic identification, asset tracking and security surveillance. This book focuses on the advances in RFID tag antenna and ASIC design, novel chipless RFID tag design, security protocol enhancements along with some novel applications of RFID.

Download or read book Multi dimensional Ultra high Frequency Passive Radio Frequency Identification Tag Antenna Designs written by Stefanie Alkistis Delichatsios and published by . This book was released on 2006 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we present the design, simulation, and empirical evaluation of two novel multi-dimensional ultra-high frequency (UHF) passive radio frequency identification (RFID) tag antennas, the Albano-Dipole antenna and the Albano-Patch antenna, that provide omnidirectional communication capabilities. The performance of a passive UHF RFID tag is highly dependent upon the tag's antenna design, the tag's placement on an item, the materials in the item, and the item's surrounding environment. The majority of existing commercial tag antennas are two-dimensional making the tags a) orientation-sensitive, working well in some directions and not at all in others, and b) susceptible to communication interference from the contents of the tagged object. The Albano antenna designs are three-dimensional, affording the tags to be minimally affected by object material while maintaining near omnidirectional performance. The Albano antenna designs provide significantly improved orientation insensitivity compared with existing widely deployed commercial tag antenna designs.

Download or read book Advanced Radio Frequency Identification Design and Applications written by Stevan Preradovic and published by IntechOpen. This book was released on 2011-03-22 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Frequency Identification (RFID) is a modern wireless data transmission and reception technique for applications including automatic identification, asset tracking and security surveillance. This book focuses on the advances in RFID tag antenna and ASIC design, novel chipless RFID tag design, security protocol enhancements along with some novel applications of RFID.

Download or read book Design and Analysis of a Low cost Passive Radio Frequency Identification Tag written by Bhavani Shankar Palokodety and published by . This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Radio frequency identification (RFID) is a means of remotely identifying objects through radio frequency communication. An RFID system provides a means to capture information inexpensively and accurately. This system allows real-time accessibility and delivery of object information, which helps track assets and shipments globally. A transponder integrated circuit (IC) is used for storing and retrieving information about a remote object. A passive RFID tag consists of an antenna and a radio frequency compatible transponder IC labeled, or attached, onto products for unique identification. This thesis deals with passive RFID tag antenna design and analysis of the read range performance of the tag on objects of different dielectric materials. Given the limits of the operating power of the transponder IC and the RFID reader transmitting power, the design issues are the read range of the tag, size of the tag, and impedance matching the tag antenna to the transponder IC. Also in this thesis a step-by-step process used to design a passive RFID tag is presented. Finally, the fundamental constraints of the design, and their associated tradeoffs, as well as measurements and analysis of the designed passive UHF RFID tag, are given"--Leaf iii.

Download or read book Grynaeus Canonia Lavinia written by and published by . This book was released on 1610 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solutions for Hard to tag Objects in UHF RFID Systems written by Zhonghao Hu and published by . This book was released on 2011 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio frequency identification (RFID) is an auto-identification technology realised by radio waves. The ultimate goal of RFID is the item-level tagging of all kinds of products in supply chains. This goal challenges industry and academia in many aspects. Passive UHF RFID systems, when compared with other RFID systems, are believed to possess advantages in achieving that goal. However, UHF RFID systems possess two serious disadvantages: (i) the relatively large antenna size, and (ii) the sensitiveness to the metallic items on which a tag is mounted. Those two deficiencies make a large number of small size objects and metallic objects hard to tag. In addition, different applications also bring special requirements or limitations in adopting UHF RFID systems, such as in the case of a container seal, the requirement for tags to have a physical security function, and in other cases such as pallet shipping, the requirement for detecting massive numbers of items densely stacked together. Finally, of course, cost is one of the key limitations if one intends to apply his or her design down to item-level tagging commercially. Hence each of the inherent deficiencies of the system itself and the limitations caused by the application, or a combination of all or some of the deficiencies and limitations make a large number of items hard to tag and impedes the item-level tagging target. The research in this thesis aims, by antenna design and electromagnetic wave analysis, to provide feasible and affordable solutions for some of those hard-to-tag objects in UHF RFID systems, and the thesis can be divided into five parts. In detail, the first part of the thesis gives the motivations, contributions and structure of this thesis. In addition it also provides a brief introduction to RFID systems and about how they are operated, developed, classified, regulated and standardised. The second part of this thesis presents basic terminologies and design criteria in tag antenna design, transponder IC design and reader design. Factors which limit the operating range of UHF RFID systems are discussed. Following this discussion, a novel method making use of a scattering matrix for evaluating the operating range of a UHF RFID system deployed in an arbitrary environment is proposed. In the third part, concerning the meander line dipole antenna (MDA), one of the approaches to minimising tag antenna size is analysed in terms of its resonant frequency, size reduction contributors, radiation pattern and efficiency. An analytic formula for calculating the resonant frequency of an MDA on a dielectric substrate as an RFID tag antenna is established. Based on the analysis, a novel tag antenna with a physical security function (an electronic seal) for protecting shipping containers was designed and experimentally verified. The fourth part of this thesis puts emphasis on metallic item detection. The reason of why common dipole based tag antennas cannot work well in close proximity to metal is given. Previous solutions and their own demerits in solving this problem are summarised. Then, a low profile, simple structure, compact size solution is introduced via the artificial magnetic conductor concept. Furthermore, a general DVD disc contains a very thin metal layer inside for the purpose of reflecting laser. That layer may not bring many troubles in identifying a single DVD by a UHF RFID system, but if thousands of DVDs were stacked, the role the metal component plays in degrading the detection of each DVD in the stack should be investigated. An approach in detecting a large number of DVDs (up to 2000) densely stacked is thus presented. Conclusions of the work in this thesis are drawn as the last part of the thesis. Besides conclusions the last part also includes some recommendations for future work and the description of the original contributions of this thesis. The potential benefits of item-level tagging in supply chains are enormous. The existence of a large number of hard-to-tag objects is one of the main challenges in achieving item-level tagging. The studies in this thesis extend the scope of the detectable objects and this extension makes item-level tagging more realisable.

Download or read book Development of Passive UHF RFID Tag Antennas for Challenging Objects and Environments written by Leena Ukkonen and published by . This book was released on 2006 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Graphene written by Sulaiman Wadi Harun and published by John Wiley & Sons. This book was released on 2019-06-12 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eighth volume in a series of handbooks on graphene research and applications The Handbook of Graphene, Volume 8: Technology and Innovations discusses the role of graphene-based applications in technological advancements. Topics include graphene materials used in circuit board repairs; RFID antenna and sensor fabrication; and wearable healthcare electronics. Chapters present detailed information on: modeling methods used in graphene research; applications of graphene-on-silicon photonic integrated circuits; the development of graphene for engineering applications; and other graphene subjects of interest to scientists, chemists and physicists.

Download or read book Design of Space Filling Antennas for Passive UHF RFID Tags written by Benjamin D. Braaten and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this chapter, an introduction to RFID systems has been presented. The major components of a RFID system were defined and the role of each one was discussed. Then, the characteristics of a RFID system were described using electric field integral equations, the Friis transmission equation and effective apertures. The electric field integral equations showed how the backscattered fields were directly related to the load at the port of the RFID antenna. The Friis transmission line equation was used to clearly show what determines the max read range of a passive RFID tag. The discussion on antenna apertures revealed how in the best possible situation only half of the incident power from the reader can be used by the passive IC. The rest of the power is scattered into the region around the tag. Next, a design methodology for producing compact space-filling antennas was presented. This section was immediately followed by two examples showing this design process. The result of this chapter is an understanding of the fundamental and important concepts of RFID systems and a structured design process for producing compact, useful space-filling antennas for many different applications.

Download or read book Sensors written by Bruno Andò and published by Springer. This book was released on 2019-01-17 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the best papers presented at the Fourth Italian National Conference on Sensors, held in Catania, Italy, from 21 to 23 February 2018. The book represents an invaluable and up-to-the-minute tool, providing an essential overview of recent findings, strategies and new directions in the area of sensor research. Further, it addresses various aspects based on the development of new chemical, physical or biological sensors, assembling and characterization, signal treatment and data handling. Lastly, the book applies electrochemical, optical and other detection strategies to relevant issues in the food and clinical environmental areas, as well as industry-oriented applications.