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Chirammal, Ramakrishnan Rijwal. "RFID Tag Design and Range Improvement." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22921.
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Radio Frequency Identification (RFID) is a short range radio technology for communication between two objects namely, a reader and a tag. Design of an RFID tag with the best range is always the motive of an RFID designer.
In this thesis two RFID tags were simulated, designed and manufactured. The first one is a semi-passive RFID tag, which also serves as a discrete prototype tag for the research group to master RFID tag designs. The user can program and further extend the use of this tag according to the requirements. This RFID tag is provided with JTAG interface to program and debug. The read range of this prototype tag is found to be 1m with reader EIRP of 30dBm. The second design is a passive tag which can be commercialized. It achieves a competitive read range of 2.9m for reader EIRP of 21dBm. The read range when measured in a practical implementation inside a building corridor was 15m.
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Kam, ChiWeng. "902-928MHz UHF RFID Tag Antenna Design, Fabrication and Test." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/598.
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Radio Frequency Identification (RFID) uses RF radiation to identify physical objects. With decreasing integrated circuit (IC) cost and size, RFID applications are becoming economically feasible and gaining popularity. Researchers at MIT suggest that RFID tags operating in the 900 MHz band (ultrahigh frequency, UHF) represent the best compromise of cost, read range, and capabilities [1]. Passive RFID tags, which exclude radio transmitters and internal power sources, are popular due to their small size and low cost [1].
This project produced Cal Poly’s first ever on-campus printed, assembled, and operational UHF (902 to 928 MHz) passive RFID tag. Project goals include RFID tag antenna design and simulation using the EMPro electromagnetic (EM) simulation tool [47], establishing the tag fabrication process, and testing, operational verification, and comparisons to commercial tag performance. The tag antenna design goal is to meet or exceed the read range performance of the commercial Sirit tag [23] while minimizing the required tag conductive area.
This thesis provides an overview of the UHF passive RFID tag fabrication process. Cal Poly’s Graphic Communication Department Laboratory applied a screen‑printing process to print RFID tag antenna patterns onto plastic (PET) substrates. RFID IC-substrate packages were manually attached to tag antennas with conductive adhesives and functionally verified and compared to commercial tag performance.
RFID tag antennas were impedance matched (using EMPro) to the Monza 3 RFID IC to maximize IC to antenna power transfer and RFID tag read range.Tag antenna read range (maximum reader-tag communication distance) was characterized in Cal Poly’s Anechoic Chamber, while RFID tag matching characteristics were measured using the differential probe method [33-41] and compared to simulations. Read range results indicate that one of the designs developed in this thesis outperforms a commercial UHF RFID tag.
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Wu, Xunxun. "Design of Passive UHF RFID Tag Antennas and Industry Application." Thesis, Högskolan i Gävle, Institutionen för teknik och byggd miljö, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-8052.
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Nowadays, there is a growing demand for reliable assets security and management in various industries. The company SolarWave is eager to implement a comprehensive security system to produce active protection for their expensive product: solar panels. This security system is not only including assets tracking, monitoring but also combined with a control system, which is used to binary control a switch of solar panel to be on in presence of the correct ID and off in absence of the correct ID. One of the technologies that made this concept viable is known as Radio Frequency Identification (RFID). The thesis project is a sub-project in the development project whose content is mentioned as above. It contains two main parts. One is the system solution for the company. The other is RFID tag design which is in parallel with the company solution in order to reach a scientific level of a master thesis. In this thesis, I systematically analyze the operating mechanism and characteristics of RFID, and propose both active and passive RFID solutions for the company. And I also suggest an alternative radio technology ZigBee which can be used instead or as a complement to RFID. Meanwhile, I propose two designs of RFID tag according to the specification of the solar panel. One is modified meandering antenna. This kind of antenna is very effective and popular in RFID tag design in order to minimize the size of antenna. The other is inductively coupled loop antenna. It is a very useful method for conjugate matching in RFID tag antenna. The required input resistance and reactance can be achieved separately by choosing appropriate geometry parameters. It makes the antenna easier to match to the tag chips. Both the RFID antenna designs are simulated on Ansoft HFSS 12.
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Yang, Li. "Design and development of novel radio frequency identification (RFID) tag structures." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31824.
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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2010.Committee Chair: Tentzeris, Manos; Committee Member: DeJean, Gerald; Committee Member: Ingram, Mary; Committee Member: Kavadias, Stylianos; Committee Member: Laskar, Joy. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Shao, Shuai. "Design and Optimization of Passive UHF RFID Tag Antenna for Mounting on or inside Material Layers." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1435758466.
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Butt, Munam. "Systemization of RFID Tag Antenna Design Based on Optimization Techniques and Impedance Matching Charts." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23064.
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The performance of commercial Radio Frequency Identification (RFID) tags is primarily limited by present techniques used for tag antenna design. Currently, industry techniques rely on identifying the RFID tag application (books, clothing, etc.) and then building antenna prototypes of different configurations in order to satisfy minimum read range requirements. However, these techniques inherently lack an electromagnetic basis and are unable to provide a low cost solution to the tag antenna design process. RFID tag performance characteristics (read-range, chip-antenna impedance matching, surrounding environment) can be very complex, and a thorough understanding of the RFID tag antenna design may be gained through an electromagnetic approach in order to reduce the tag antenna size and the overall cost of the RFID system. The research presented in this thesis addresses RFID tag antenna design process for passive RFID tags. With the growing number of applications (inventory, supply-chain, pharmaceuticals, etc), the proposed RFID antenna design process demonstrates procedures to design tag antennas for such applications. Electrical/geometrical properties of the antennas designed were investigated with the help of computer electromagnetic simulations in order to achieve optimal tag performance criteria such as read range, chip-impedance matching, antenna efficiency, etc. Experimental results were performed on the proposed antenna designs to compliment computer simulations and analytical modelling.
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Horák, David. "Návrh meandrovité antény pro RFID aplikaci." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217472.
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This thesis deals with RFID tags. In the first part of the thesis, the general overviews of the present-day RFID systems are presented. This part of the thesis is focused on the passive back-scatter UHF tags and the advantages of their application in supply chain usage. Subsequently, the electromagnetic simulators CST Microwave Studio and IE3D Zeland are described. These simulators were used to design loaded meander antennas. The antennas were designed for different materials and frequency bands of 867 MHz and 2.4 GHz. The designed antennas were made without as well as with the reflector which allows using the antennas in the vicinity of metals. Produced antennas were experimentally tested in the company METRA Blansko Inc, where one of the most significant characteristics of passive RFID tags – the read range was observed.
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Souza, Aline Coelho de. "Conception d’antennes et méthode de caractérisation des systèmes RFID UHF en champ proche et en champ lointain." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT095/document.
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La technologie d'identification par radiofréquence (RFID) a eu un essor très important ces dernières années notamment grâce à sa configuration polyvalente et aux innombrables possibilités d'intégration offertes par cette technologie notamment avec l'apparition d'un nouveau contexte applicatif celui des objets connectés. Depuis quelques années, des applications de la RFID UHF en champ proche ont été notamment développées afin de surmonter les problèmes liés à la dégradation de lecture des tags lorsqu'ils sont placés dans des milieux fortement perturbateurs. Les travaux de recherche présentés dans cette thèse s'intéressent à l'étude de la technologie RFID UHF en zones de champ proche et de champ lointain. Les études portent plus particulièrement sur la conception d'antennes lecteur et d'antennes tag ainsi que sur les méthodes de caractérisation des systèmes RFID en zones de champ proche et de champ lointain. Une étude sur les caractéristiques des champs rayonnées par une antenne est réalisée afin de souligner les critères les plus pertinents en vue de concevoir des antennes pour les lecteurs RFID, performantes en zone de champ proche. A partir de l'état de l'art sur les antennes tags et les méthodologies de conception classiques, une nouvelle approche de conception est développée qui vise à améliorer la conception d'antennes tags en intégrant une vision appropriée pour tenir compte du niveau de puissance espéré dans une application donnée. Enfin avec pour objectif la caractérisation des tags RFID UHF, d'une part une approche est proposée permettant l'identification de familles de tags, et d'autre part, une procédure innovante pour la mesure de l'efficacité du transfert de puissance est proposée et validée expérimentalementThe Radiofrequency Identification technology (RFID) has had a huge growth these last years, due to its versatility and the uncountable possibilities to integrate this technology in many different application (tracking and inventory of goods, access control, supply chain, etc.), and in particular the brand new context of internet of things projects. For some years, the near field UHF RFID applications has been developed in order to overcome the problems related to degradations of tag's read range when needing to use it in a perturbing environment. The research work presented in this thesis come as a study of the UHF RFID in near field and far field zones. This study focus more particularly on the design of reader and tag antennas and on the characterization method in near field and far field zones. A study on the characteristics of fields outgoing from an antenna has been made, in order to underline the important criteria for the design of performant UHF RFID reader antennas in near field zone. From the state of art about tag antennas design and classical methodologies, we propose a new approach that aims improving the design of tag antennas in a more suitable point of view that is getting the expected power level in a given application. Finally, with an objective to characterize UHF RFID tags, we first propose a new approach enabling the identification of tag families, and then propose a new innovating power transfer efficiency measurement procedure, that has been validated experimentally
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Marques, João Miguel da Conceição. "Análise dos fatores que influenciam a eficiência da tecnologia RFID aplicada a sistemas de produção." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/75902.
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Os sistemas de identificação por radio frequências (RFID - Radio Frequency IDentification) são uma tecnologia de transmissão e armazenamento de informação remota, composta por dispositivos (etiquetas e leitores RFID), que comunicam à distância sem necessitarem de qualquer contato direto. Embora a RFID possua algumas décadas de existência, apenas nos últimos anos tem recebido atenção por parte do meio industrial e demonstrado ser uma tecnologia com um futuro promissor, devido especialmente às suas inúmeras possibilidades de utilização e vantagens que possui quando comparada com outras tecnologias semelhantes. Embora a utilização da RFID aparente ser bastante vantajosa e com bastantes benefícios, muitas questões e dificuldades são colocadas no momento da sua implementação. No âmbito desta dissertação será apresentado uma revisão bibliográfica sobre o estado de arte da tecnologia RFID, os dispositivos que a compõem e que são essenciais ao seu funcionamento, assim como várias aplicações da tecnologia. Serão igualmente abordados os problemas que dificultam a disseminação da tecnologia. O objetivo do trabalho foi (i) realizar um levantamento na literatura dos fatores que influenciam a eficiência da tecnologia RFID e (ii) realizar uma análise experimental dos fatores que influenciam a capacidade de transmissão do sinal de radio frequência entre os vários dispositivos RFID existentes no contexto industrial.The Radio frequency identification (RFID) systems are a technology that permits the transmission and storage of information remotely, composed of devices (tags and readers), which communicate at a distance without the need for any direct contact. While RFID has a few decades of existence only in recent years it has received attention from the industrial environment and demonstrated to be a technology with a promising future, especially due to its many possibilities of use and advantages when compared with other similar technologies. However, although the actual use of RFID may appear to be very advantageous and with many benefits, many issues and problems are posed at time of implementation. Within this dissertation it will be presented a literature review on the state of the art RFID technology, the devices that make up to it and that are essential to its operation, as well as the various applications of technology. The problems and difficulties that are posed at the moment and difficulties that compromise the spread of technology will also be discussed. The objective of this work was (i) to conduct a literature review of the factors that influence the efficiency of RFID technology and (ii) conduct an experimental analysis of the factors that influence the ability of signal transmission between different radio frequency RFID devices existing in the industrial context.
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Andia, Vera Gianfranco. "Analyse et exploitation des non linéarités dans les systèmes RFID UHF passifs." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT052/document.
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Avec l'explosion de l'Internet des Objets (IoT), de nouveaux dispositifs permettant de tagguer les objets sont nécessaires afin de permettre non seulement leur identification mais aussi d'assurer des communications fiables et de nouvelles fonctionnalités comme la détection, la localisation ou la capture d'informations. Cette tendance s'appuie sur la technologie bien établie qu'est la radiofréquence par identification (RFID) et donc l'utilisation d'étiquettes (ou tags) faibles coûts et télé-alimentés. Dans ce contexte, de nombreux travaux au niveau de la couche d'application se tournent vers la mise au point de traitements logiciels complémentaires visant à produire de nouveaux types d'information. D'autres travaux visent à améliorer la couche physique avec l'objectif de miniaturiser encore le tag mais aussi de le doter de nouvelles capacités. Jusqu'à présent, il n'existe quasiment pas de travaux concernant la transmission du signal et aucun sur l'exploitation du comportement non-linéaire des puces RFID. Cette thèse vise à étudier les phénomènes non-linéaires produits lors d'une communication RFID.Dans la première partie, deux plateformes de mesure et de caractérisation spécifiques ont été développées : la première vise à observer les signaux au cours d'une communication RFID, et alors caractériser et analyser les effets liés aux phénomènes non linéaires ; la seconde permet d'effectuer différentes mesures directement sur les puces et les caractériser en termes d'impédance, production d'harmoniques et sensibilité. Ces plateformes ont permis : 1) de mettre en évidence que les fréquences harmoniques sont porteuses d'informations qui peuvent être exploitées et même offrir de nouvelles fonctionnalités ; 2) d'obtenir de nombreuses informations sur les propriétés des puces et d'en établir un modèle électrique précis ; 3) de déterminer des critères permettant d'évaluer la performance des tags dans le contexte étudié.Dans la deuxième partie, plusieurs nouveaux tags RFID ont été conçus, fabriqués, mesurés et évalués. Ces nouveaux tags fonctionnent non seulement dans la bande UHF mais aussi sont adaptés à la troisième harmonique dans la bande des microondes. Une méthodologie et des lignes directives d'aide à la conception de ce type de tags ont été établies et s'appuient sur les deux plateformes développées afin de caractériser les différents éléments. Dans un même temps, les effets liés à la fabrication ont aussi été étudiés et des études paramétriques ont permis de mettre en évidence l'effet sur les performances de la géométrie de l'antenne et du type de puce utilisée.Dans une troisième partie, les études se sont focalisées à exploiter les effets non-linéaires des dispositifs de redressement. L'idée générale est de coupler la RFID passive avec les dispositifs de transferts de puissance et de récupération d'énergie avec pour objectifs 1) de maximiser l'efficacité de conversion RF – continu 2) et d'augmenter la distance de lecture des tags passifs. Plusieurs prototypes ont été réalisés et leurs performances ont été démontrées.L'ensemble de ces travaux a mis en évidence un nouveau concept de communication RFID exploitant les non-linéarités générées par les puces RFID. Ce concept ouvre la voie à de nouvelles applications. et a fait l'objet d'une demande de brevet internationalPowered by the exploding popularity of the Internet-of-Things (IoT), the demand for tagged devices with labels capable to ensure a reliable communication with added functions beyond the identification, such as sensing, location, health-care, among others, is growing rapidly. Certainly this growing is headed by the well-established Radio Frequency Identification (RFID) technology, and the use of wireless low-cost self-powered tags, in other words passive RFID tags, is the most widespread used alternative. In the constant evolution on this field, usually new software treatments are offered at the application layer with the objective to processing data to produce some new information. Further works aimed at improving the physical layer around the tag antenna miniaturization and matching techniques. So far, little or no work had been done on the exploitation of the communication channel, and certainly none has been done on the exploitation of the non-linear behavior of RFID chips.After presenting the RFID technology and phenomena produced by Radio Frequency (RF) non-linear devices, and leaning in some nearby works on the field, the core of this thesis starts by exposing two characterization platforms for the evaluation of non-linear phenomena presented during the reader-tag communication. One is specialized in radiating measurements considering the whole tag (antenna and chip) under test. The other is specialized in conducted measurements directly over RFID chips, allowing performing different parametric studies (power dependency, impedance, harmonic production, sensitivity). The characterization results show that harmonic signals generated from the passive RFID chip carry information.By exploiting the characterization results and to verify the hypothesis of exploitation of non-linearities in RFID, i.e. the use of harmonic signals, the research is pursued by designing, fabricating, and measuring four different configurations of RFID tags. The new RFID tags operate at the fundamental frequency in the UHF band and at its $3^{rd}$ harmonic in the microwave band. Antenna design policies, fabrication details, and parametric studies on the performance of the new prototypes are presented. The parametric study takes special care in the antenna structure, kind of chip used, received power, and read range.Finally, some alternatives approaches for the exploitation of non-linear effects generated by rectifying devices are presented. Some theoretical aspects and experimental results are discussed linking the passive RFID technology to the theories of Wireless Power Transfer (WPT) and Electromagnetic Energy Harvesting (EEH). The solution takes advantage of the non-linear nature of rectifying elements in order to maximize the RF-to-DC conversion efficiency of EEH devices and increase the read range of passive RFID tags. The solution triggers on the design of a RF multi-device system. The design procedure and tests consider three non-linear phenomena: (1) the impedance power dependency, (2) the harmonic production, and (3) the rectifying dependence on the RF waveform
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Gao, Jinlan. "Antenna-based passive UHF RFID sensor tags : Design and application." Doctoral thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19889.
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RFID, as a low cost technology with a long life time, provides great potential for transmitting sensor data in combination with the ordinary ID number. The sensor can, for example, be integrated either in the chip or in the antenna of an RFID tag.This thesis focuses on the design of antenna-based UHF RFID sensor tags as wireless sensors at the lowest possible cost level compatible with standard communication systems in logistics. The applications of the sensor tags, in this work, mainly target remote humidity sensing. Antenna-based sensory UHF RFID tags utilize the influence that the physical or chemical parameters to be sensed have on the electrical properties of a tag antenna. The variations of the electrical properties of the tag antenna can be measured in many ways. In the thesis, a description is provided as to how these variations are normally measured by an RFID reader without any other assistant equipment. Three structures of antenna-based RFID sensor tags are presented with detailed characterizations. The first one utilizes the sensitivity of the antenna to the surrounding environment to construct RFID sensor tags, where a moisture absorbing layer providing wetness/humidity sensor functionality is placed on the RFID tag antenna to increase the humidity concentration surrounding the tag antenna and the thesis describes how to overcome certain limitations due to disturbances associated with background materials. The second structure directly integrates a small resistive sensor element into an RFID tag antenna and the sensor information can thus modulate the antenna performance by means of galvanic contact. The third structure embeds a small resistive sensor element into a loop which is positioned on top of the tag antenna and the sensor information can thus modulate the performance of the tag antenna by means of electromagnetic coupling. Both theoretical analysis and fullwave simulations are presented for the latter two sensor tag structures in order to characterize the performance of the sensor tags. An ultra-low cost printed humidity sensor with memory functionality is also designed and thoroughly characterized for integration into RFID tag antennas by means of galvanic contact or electromagnetic coupling. The sensor is a 1-bit write-once-read-many (WORM) memory printed using conductive ink. The WORM works as a pure resistive humidity sensor and can provide information about an historical event. The WORM sensor is presented by introducing its geometry, characterizingits behavior in humidity and explaining the principle of the humidity effect. The WORM sensors are also integrated into the RFID tags by means of both galvanic contact and electromagnetic coupling in order to experimentally verify the two concepts. To lower the cost of the RFID tags, the antennas are normally printed, milledor etched on flexible substrates using low-cost high-speed manufacturing methods which in some cases cause a high degree of edge roughness. The edge roughness will affect the behavior of the antenna, however, the characteristics of edge roughness on RFID antennas have previously not received any significant attention. Unforeseen antenna behavior can affect the antenna-based sensor tags, thus the influence of edge roughness is also investigated in the thesis.
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Nordström, Edward, and Johan Hollander. "Design och implementering av enhandsburen RFID-läsare." Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-6752.
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Radio frequency identification (RFID) is a versatile wireless technology usedworldwide. The fields of applications are many and its popularity constantlygrows due to smaller in size, better and less expensive components. RFID isused to identify, track or share information about an object using radio waves.
This master thesis describes the process of designing and implementing ahandheld UHF RFID reader. The goal was to, based on a UHF RFID-chipdesign a fully functional, small in size and power efficient device. Amicrocontroller provides the user interface and is also used to control theRFID-chip and a Bluetooth device. A Bluetooth- and GPRS-compatible mobilephone will be used to forward data to a server connected to the Internet. Allparts of the design are described, such as the printed circuit board design aswell as the software for the micro controller and the mobile phone.
Because the extent of this thesis it is neither possible nor necessary to dig toodeep into the Bluetooth- or GPRS-protocol. The focus will be on designingsoftware and hardware for the handheld unit.
Radio frekvens identifiering (RFID) är en mångsidig trådlös teknik somanvänds över hela världen. Områdena där tekniken används är många och dess popularitet växer konstant tack vare mindre storlek, bättre och billigarekomponenter. RFID används för att identifiera, spåra eller dela med siginformation om ett objekt med radiovågor.
Det här examensarbetet beskriver processen av design och implementering aven handburen UHF RFID läsare. Målet har varit att, baserat på ett UHF-RFIDchip, designa en fullt fungerande, liten och strömsnål enhet. En microcontroller förser dels användaren med ett användargränssnitt och sköter delskommunikationen med RFID chip och en blåtandsmodul. En blåtands- ochGPRS- eller 3G-kompatibel mobiltelefon används for att skicka vidare data tillen server kopplad till Internet. Alla delar av designen är beskrivna, så som PCB design, mjukvara för micro controllern och mobiltelefonen.
På grund av omfattningen av det här examensarbetet så har det inte varitmöjligt eller nödvändigt att gräva för djupt i Blåtands- eller GPRS/3Gprotokollen. Fokus är på att designa hårdvara och mjukvara för den handhållna enheten.
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Battistini, Nicholas. "Digital design of an EPC Gen2 controller for enhanced RFID tags." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19641/.
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This thesis presents an improvement of the long range battery-less UHF RFID platform for sensor applications which is based on the open source Wireless Identification and Sensing Platform (WISP) project. The purpose of this work is to design a digital logic that performs the RFID EPC gen2 protocol communication, is able to acquire information by sensors and provide an accurate estimation of tag location ensuring low energy consumption. This thesis will describe the hardware architecture on which the digital logic was inserted, the Verilog code developed, the methods by which the digital logic was tested and an explorative study of chip synthesis on Cadence.
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Frushour, John H. "Design considerations for a computationally-lightweight authentication mechanism for passive RFID tags." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FFrushour.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2009.Thesis Advisor(s): Fulp, J.D. ; Huffmire, Ted. "September 2009." Description based on title screen as viewed on November 6, 2009. Author(s) subject terms: Passive RFID Systems, Tags, Clock, Electro-magnetic induction, authentication, hash, SHA--1. Includes bibliographical references (p. 59-60). Also available in print.
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Akbar, Muhammad Bashir. "Design and prototype development of motion and shock sensing rf tags." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43666.
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Since the inception of the backscatter-radio technology, this field has continually evolved. As a result, this technology is used for a multitude of applications like personnel identification, logistics and assets management and military purposes etc. Radio Frequency Identification (RFID) technology works in several ISM-frequency bands. This work pertains to the design and development of an RF tag that uses 5.8
GHz ISM band for backscatter. This frequency band has many inherent advantages like higher gain antennas, smaller sized tags, increased immunity to conductive object losses, and larger RF bandwidth.
The objective of this research is design and prototype development of an RF tag capable of sensing acceleration, angular motion, and shock experienced by an object on which it is installed. The sensed information is modulated onto an incident continuous wave (CW) and backscattered to the reader. Literature research suggested that such work has not been done previously using an RFID platform. The challenges
include integration of the sensor, antenna and other electronics to efficiently backscatter the information to the receiver, designing a suitable planar antenna, realtime backscattering of the sensed information, and low power consumption. As a further step, it is required to design and integrate two antennas on RF tag to simultaneously
backscatter the same information; and to measure and compare its effect with single antenna tag.
The sensed impact/shock and rotational movement information from the inertial sensors (accelerometer and gyroscope) was backscattered instantly and displayed on the custom developed graphical user interface. The development of GUI was not part of this project and was developed by another lab member. RF Tags with single and dual antenna configurations were designed and tested. It was observed that by increasing the number of antennas higher read range can be achieved. Moreover, by doubling the antennas the radar cross-section for the tag was approximately doubled.
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Atojoko, Achimugu A. "Design and Modelling of Passive UHF RFID Tags for Energy Efficient Liquid Level Detection Applications. A study of various techniques in the design, modelling, optimisation and deployment of RFID reader and passive UHF RFID tags to achieve effective performance for liquid sensing applications." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/15906.
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Sewer and oil pipeline spillage issues have become major causes of pollution in urban and rural areas usually caused by blockages in the water storage and drainage system, and oil spillage of underground oil pipelines. An effective way of avoiding this problem will be by deploying some mechanism to monitor these installations at each point in time and reporting unusual liquid activity to the relevant authorities for prompt action to avoid a flooding or spillage occurrence. This research work presents a low cost energy efficient liquid level monitoring technique using Radio Frequency Identification Technology. Passive UHF RFID tags have been designed, modelled and optimized. A simple rectangular tag, the P-shaped tag and S-shaped tag with UHF band frequency of operation (850-950 MHz) has been designed and modelled. Detailed parametric analysis of the rectangular tag is made and the optimised design results analysed and presented in HFSS and Matlab. The optimised rectangular tag designs are then deployed as level sensors in a gully pot. Identical tags were deployed to detect 4 distinct levels in alternate positions and a few inches in seperation distance within the gully pot height (Low, Mid, High and Ultra high). The radiation characteristic of tag sensors in deployment as modelled on HFSS is observed to show consistent performance with application requirements. An in-manhole chamber antenna for an underground communication system is analysed, designed, deployed and measured. The antenna covers dual-band impedance bandwidths (i.e. 824 to 960 MHz, and 1710 to 2170 MHz). The results show that the antenna prototype exhibits sufficient impedance bandwidth, suitable radiation characteristics, and adequate gains for the required underground wireless sensor applications. Finally, a Linearly Shifted Quadrifilar Helical Antenna (LSQHA) designed using Genetic Algorithm optimisation technique for adoption as an RFID reader antenna is proposed and investigated. The new antenna confirms coverage of the RFID bandwidth 860-960 MHz with acceptable power gain of 13.1 dBi.
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Kalayci, Sefa. "Design Of A Radio Frequency Identification (rfid) Antenna." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610554/index.pdf.
Full textAbstract:
Fundamental features of Radio Frequency Identification (RFID) systems used in different application areas will be reviewed. Techniques used in realizing RFID antenna systems will be studied and the procedure to realize a specific RFID antenna type possessing desired characteristics will be described. Electrical properties such as radiation pattern, impedance will be predicted using analytical and/or computer simulation techniques. Experimental investigations will be carried out to complement the theoretical work.
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Holland, William S. "Development of an Indoor Real-time Localization System Using Passive RFID Tags and Artificial Neural Networks." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1249062541.
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Zuffanelli, Simone. "Antenna design solutions for radio frequency identification (RFID) tags based on metamaterial-inspired resonators and other resonant structures." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/314186.
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Avui dia, la identificació automàtica i unívoca d’objectes s’està imposant com a necessitat creixent a nivell global, degut al ràpid increment de la producció i del comerç mundial. En resposta, la identificació per radiofreqüència (RFID) està emergint com una alternativa viable i més evolucionada al codi de barres, i està sent utilitzada en una multitud d’aplicacions diferents, tal com el seguiment de paquets, els inventaris intel·ligents, el control d’accessos i el pagament sense contacte. Encara que la tecnologia RFID ha aconseguit entrar amb èxit en la nostra vida diària, oferint una solució convenient en moltes aplicacions, existeixen alguns reptes que estan frenant la seva difusió. Per exemple, l’etiquetatge de petits objectes metàl·lics necessita de més recerca, per tal d’obtenir etiquetes RFID més primes i petites, donat que actualment les etiquetes RFID per metall són més gruixudes i més cares que les etiquetes RFID convencionals. El disseny d’etiquetes RFID miniaturitzades amb una resposta independent de l’orientació és també un problema encara pendent. En altres casos, el context d’etiquetatge requereix maximitzar la distancia de lectura, encara que això impliqui augmentar les dimensions de l’etiqueta. Per tant, el disseny d’etiquetes RFID d’alta distancia de lectura és un altre repte interessant en la investigació sobre la tecnologia RFID.
L’objectiu principal d’aquesta tesi és la recerca de solucions pràctiques als problemes mencionats, que contribueixin al desenvolupament de la tecnologia RFID, així com a la seva ulterior difusió en les aplicacions de la vida diària. En concret, aquest treball es focalitza en el disseny d’antenes per etiquetes passives de RFID a la banda UHF basades en ressonadors inspirats en el món dels metamaterials (ressonadors d’anells oberts i estructures derivades) com a elements radiants, explorant també solucions alternatives basades en altres estructures ressonants.Nowadays, the automatic and univocal identification of items all around the world is becoming a growing necessity, as a consequence of the rapid increase of the global production and trade. In this regard, radio frequency identification (RFID) technology has been emerging as a suitable and more evolved alternative to barcodes, being already used in a multitude of applications in everyday life, such as items tracking through the supply chain, smart inventory, access control and contactless payment. However, although RFID has achieved entering into the mainstream of technology, already providing a cost-effective solution in many scenarios, several challenges are still waiting response. Among these, the identification of small metallic objects still requires further efforts for obtaining thinner and smaller RFID tags, being the current on-metal tagging solutions thicker and much more expensive than conventional RFID tags. Also, the design of miniaturized RFID tags presenting uniform (or quasi-uniform) reading pattern, which would allow identification of small objects independently from their orientation, is still troublesome. On the other hand, some applications require maximizing the reading distance, even at the expense of the tag dimensions, so that the design of RFID tags with optimized reading distance is another interesting research subject within the frame of RFID technology. The main objective of this thesis is to explore solutions to the aforementioned problems, thus contributing to the advance of RFID technology, and to its further extension to everyday life applications. To this end, this work is focused on the antenna design for passive RFID tags working at the UHF frequency band (passive UHF-RFID tags), exploring the use of metamaterial-inspired resonators (i.e., the split-ring resonator and its derived structures) as radiating elements, and also considering alternative solutions based on other kinds of resonant structures.
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Saldanha, Nancy. "Modeling, design and fabrication of orthogonal and psuedo-orthogonal frequency coded SAW wireless spread spectrum RFID sensor tags." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5025.
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Surface acoustic wave (SAW) sensors offer a wireless, passive sensor solution for use in numerous environments where wired sensing can be expensive and infeasible. Single carrier frequency SAW sensor embodiments such as delay lines, and resonators have been used in single sensor environments where sensor identification is not a necessity. The orthogonal frequency coded (OFC) SAW sensor tag embodiment developed at UCF uses a spread spectrum approach that allows interrogation in a multi-sensor environment and provides simultaneous sensing and sensor identification. The SAW device is encoded via proper design of multiple Bragg reflectors at differing frequencies. To enable accurate device design, a model to predict reflectivity over a wide range of electrode metallization ratios and metal thicknesses has been developed and implemented in a coupling of modes (COM) model. The high coupling coefficient, reflectivity and temperature coefficient of delay (TCD) of YZ LiNbO[sub3] makes it an ideal substrate material for a temperature sensor, and the reflectivity model has been developed and verified for this substrate. A new concept of pseudo-orthogonal frequency coded (POFC) SAW sensor tags has been investigated, and with proper design, the POFC SAW reduces device insertion loss and fractional bandwidth compared to OFC. OFC and POFC sensor devices have been fabricated at 250 MHz and 915 MHz using fundamental operation, and 500 MHz and 1.6 GHz using second harmonic operation. Measured device results are shown and compared with the COM simulations using the enhanced reflectivity model. Additionally, the first OFC devices at 1.05 GHz were fabricated on 128[superscript o] YX LiNbO[sub3] to explore feasibility of the material for future use in OFC sensor applications. Devices at 915 MHz have been fabricated on YZ LiNbO[sub3] and integrated with an antenna, and have then been used in a transceiver system built by Mnemonics, Inc. to wirelessly sense temperature.; The first experimental wireless POFC SAW sensor device results and predictions will be presented.ID: 029809657; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2011.; Includes bibliographical references (p. 148-152).
Ph.D.
Doctorate
Electrical Engineering and Computer Science
Engineering and Computer Science
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López, Soriano Sergio. "Diseño de antenas para etiquetas de RFID en escenarios de alta exigencia." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/462033.
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Los avances tecnológicos vividos en las últimas décadas han propulsado la implantación de los sistemas de identificación por radiofrecuencia (RFID) dentro de una amplia variedad de campos de aplicación, entre los que se encuentran la cadena de distribución industrial u otras de ámbito popular como el conocido sistema de pago en peajes (teletag).
La buena acogida de esta tecnología dentro de la sociedad moderna impulsa la constante aparición de nuevas aplicaciones. Ello conlleva la constante evolución de los sistemas de RFID con el fin de proveer soluciones específicas que cumplan con los requisitos de cada aplicación. Por un lado, la industria actual requiere de procesos de automatización del registro de entrada/salida, alertas de mantenimiento, sistemas de localización y optimización de las inversiones (mejorar la eficiencia de los trabajadores, evitar hurtos y extravíos, optimizar los tiempos de transporte, mejorar la calidad del servicio y del producto, etc.). El extravío y el robo de herramientas, equipos electrónicos y/o maquinaria, en la industria de la construcción y en el sector salud, producen graves pérdidas económicas en ambos sectores. Concretamente en el caso de la asistencia sanitaria, el seguimiento y control de activos y personas, además, resultaría en una mejor utilización de los recursos y en la reducción de costes, así como en la disminución de errores médicos, lo que resultaría en el aumento de la seguridad de los pacientes.
Además de imponer estrictas restricciones sobre las etiquetas, el escenario de la aplicación influye decisivamente en el rendimiento final del sistema. De entre los posibles escenarios de aplicación, los escenarios de alta exigencia son el subconjunto que presenta mayor perjuicio para el alcance de las etiquetas. Los casos con un efecto más devastador sobre la eficiencia de la antena son el etiquetado de objetos metálicos y el etiquetado de objetos de alta conductividad, como en el caso de la identificación de personas. Los escenarios de aplicación estudiados a lo largo de este trabajo son el etiquetado de objetos metálicos, el seguimiento de pacientes en instalaciones hospitalarias y el uso de determinadas estructuras (guías de onda) como potenciales canales de comunicación para sistemas de RFID.
El presente documento repasa el estado del arte actual del diseño de etiquetas, en los escenarios mencionados, con el objetivo de minimizar los efectos perjudiciales sufridos por la antena de la etiqueta, tras lo cual, se realizan diseños innovadores para dar solución a los problemas más comunes de las aplicaciones actuales como son la miniaturización de las etiquetas, la reducción de los costes de fabricación, la sintonización de la impedancia de la antena con los diversos μ-chips disponibles en el mercado, y por supuesto, el aumento del alcance o rango de lectura del sistema.Technological advances in the last decades, in areas such as reach, security, storage or reading rate, among others, have propelled the implantation of radio frequency identification (RFID) systems within a wide variety of fields of application among which may be mentioned the production and distribution chain in the industry or others of particular use as the well-known teletag toll payment system. The good insertion of this technology within modern society prompts the constant emergence of new applications. This entails the constant evolution of RFID systems in order to provide specific solutions that meet the requirements of each application. In addition to imposing strict restrictions on tags, the application scenario has a decisive influence on the final performance of the system. Among the possible application scenarios, the highly demanding scenarios are the subset that presents the most detriment to the read range of the tags. The cases with a more devastating effect on the efficiency of the antenna are the labeling of metallic or high conductivity objects, as the identification of people. The main application scenarios discussed in this document are the labeling of metallic objects and the tracking of patients inside hospital facilities. On the one hand, the current industry requires automation processes in the input / output register, maintenance alerts, localization systems and optimization of investments (improve worker efficiency, avoid theft and loss, optimize transport times, improve the quality of the service and the product, etc.). The loss and theft of tools, electronic equipment and / or machinery, in the construction industry and in health care, produce serious economic losses in both sectors. Specifically in the case of health care, the monitoring and control of assets and people would also result in a better use of resources and reduction of costs, as well as the reduction of medical errors, which would result in the increase of patient safety. The objective of this work is to study the mentioned scenarios, with the intention of minimizing the detrimental effects caused by labeled objects on the antenna efficiency, after which innovative designs are sought to solve the most common problems of current applications such as miniaturization of labels, reduction of manufacturing costs, tuning the impedance of the tag antenna to the various μ-chips in the market, and of course, the reading range of the system.
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Tan, Jun [Verfasser], Eckhard Akademischer Betreuer] Hennig, Klaus [Akademischer Betreuer] [Hofmann, and Ralf [Gutachter] Sommer. "Design methodology and implementation of fully passive RFID SoC with temperature sensor / Jun Tan ; Gutachter: Ralf Sommer ; Eckhard Hennig, Klaus Hofmann." Ilmenau : TU Ilmenau, 2021. http://d-nb.info/1232176060/34.
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HUANG, LIN-SIANG, and 黃麟翔. "Passive RFID Tag Design." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/x76e77.
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碩士國立臺灣科技大學
電機工程系
99
In this study, the approach to design RF to DC and demodulator which both have 905MHz operation frequency is the process of the UMC 90 nm CMOS. The functions of those are to provide DC voltage and demodulate signal in the structure of Passive RFID Tag application. Through the simulation, the minimum input power, output voltage, and the maximum power efficiency are -10 dBm, 1.08 V, and 4.9% respectively. The measurements of the chip, which sizes 0.46×0.52 mm^2, are -10 dBm, 1.08 V, and 1%. Moreover, the range of the data rate is 16.6 Kbps to 25 Kbps. TSMC 0.18um CMOS process is use to accomplish 905 MHz Passive RFID Tag. To enhance the power efficiency, the property of zero threshold voltage of native CMOS device is used to establish the three-stage charge pump as the core of the RF to DC. The minimum input power, output voltage, and the maximum power efficiency of the tag’s RF to DC are -20 dBm, 0.59V, and 26.7% respectively. In additionally, the measurements of the chip, which area is 0.52×0.62mm^2, are -1dBm, 0.7 V, and 0.49%.
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Chiuan, Chang Chia, and 張家銓. "Design of RFID Tag Chip." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/53529345138664861697.
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碩士中華大學
電機工程學系碩士班
92
This thesis is about the circuit design of the Tag part in the Radio Frequency Identification (RFID) system and the basic function of Tag. The design procedures include the simulation of digital software and functions; the next is the design of the basic logic gates and analog circuits and the last one is the considerations for IC layout.The first part of the thesis includes the introduction, the planning of the RFIDsystem, the formation and formulation of the specification of RFID system, and the second part focuses on chip design, measurement, and the conclusion of the thesis. The preliminary designed functions of the circuit is: being the Schmitt trigger Clock using the capacitance to be a frequency buffer, being the error detective code of CRC-16, being the Manchester code and making rectification, oscillation, and modulation through single circuit. Finally, this IC design is complete.
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Chen, Yu-Min, and 陳育民. "Design of RFID semi-passive tag." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/74301647329630234289.
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碩士國立高雄海洋科技大學
海洋工程科技研究所
96
Abstract Over the past few years, the application of RFID (Radio Frequency Identification) is wider and deeper than before. For example, access security, medical process control, goods tracking, and tickets used in public transportation, may penetrate the RFID technology the application to obtain the good monitoring and tracing. This thesis is about the circuit design of the Tag part in the Radio Frequency Identification system and the basic function of Tag, and the circuit contains three parts；clock generate circuit , digital encoder circuit, and analog circuit. The circuit using HSpice to simulate. Finally, this IC design is complete.
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Lee, Ming-Shiang, and 李銘祥. "Design of 915MHz RFID Tag Antenna." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/17452450408484838811.
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碩士國立成功大學
電機工程學系碩博士班
96
This paper focuses on the design of 915MHz RFID（Radio Frequency Identification）tag antenna. First We introduce the structure of RFID and its basic theory，Then We design the antenna with a single-layer structure， and use low-cost FR4 as the subtrate . And by directly matching the antenna input impedance to the tag input impedance , the maximum power could be delivered . Then we design and implement the 915 MHz tag antenna . We also compare the difference between antennas mounted on a cardboard box or on a conductor. And design a 915 MHz tag antenna suitable for both the cardboard boxes and the conductor . We test the read distance in a non-reflection chamber to measure its performance . Besides we also analyze the antenna parameters to study the relationship between its impedance property and its structure . Thus we propose a design for the 915 MHz RFID tag antenna.
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Shao, hung Chen, and 鄭紹宏. "Design of Miniaturized RFID Tag Antennas." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/63955762823247625802.
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碩士國防大學中正理工學院
應用物理研究所
96
In this thesis, three small RFID tag antennas are proposed. They are all of half-wave dipole types and operated at UHF and 2.45GHz dual bands. Good radiation efficiency, omni-directional radiation patterns and more shortened physical length than that of a conventional half-wave dipole antenna are also the essential requirements for the proposed antennas. There are different constructions for the radiators of the three proposed antennas. For reducing the whole length of a half-wave dipole antenna, the first antenna design has a Minkowski Island Fractal construction, the second antenna design has a complicated radiator composed of Koch Curve and Minkowski Fractal structure, while the third proposed RFID tag antenna is constructed with a meander line. In the same time, the proposed antennas have good impedance matching at two operating frequencies by properly designing a simple matching construction at the input port.
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Chung, Hsin-Hsiao, and 鍾欣曉. "Design of UHF RFID Tag Antennas." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/44084060923577273135.
Full textAbstract:
碩士中華大學
電機工程學系(所)
95
AbstractIn this thesis, a method of designing passive radio frequency identification (RFID) tag antenna in UHF band is presented. Impedance conjugate matching between the antenna and the chip is very important to design a good tag antenna. But the impedance of chip is not usually to design in 50 ohm; it causes the impedance conjugate matching difficulty. In addition, measurement environment and application material will influence impedance and characteristic of the tag antenna. In order to solve these problems, we uses load pull measurement to discuss impedance conjugate matching between the chip and the antenna. We can find the best impedance matching region in different environment and how to design an appropriate UHF RFID tag antenna. We design tag antennas in different impedance in order to verify the result of load pull measurement. We also can analysis the influence on read range and quality in different environment. (Keywords: RFID, Tag antenna, Load pull)
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Huang, Chih-Cheng, and 黃志成. "Design of UHF RFID Fractal Tag Antenna." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/t99qur.
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碩士國立臺北科技大學
機電整合研究所
98
This thesis aims to develop miniaturized tag antennas that can be applied on objects. The novel tag antenna has features of low-power consumption, low cost, easy to fabricate, and sufficient transmission range. To increase the efficiency of this miniaturized antenna, we use Hilbert fractal structure. The Hilbert fractal structures can be used to enhance bandwidth and gain performance, while reduce the antenna size at the same time. In this study, we designed three types of tag antenna to accommodate three different operation scenarios: standalone (unattached to anything), attached to floor, and to water containers. We use the UHF RFID band in Taiwan, which is 922~928 MHz. The test result shows that the standalone tag could be read as far as 5.02 meters. The maximum reading range from tags attached on floor is 0.7 meters. The tags on water containers could be read from a maximum distance of 1.7 meters.
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Chiang, Tseng-Hsu, and 江增旭. "Design of RFID Tag and demodulation Chip." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/08638497941158014860.
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碩士國立高雄第一科技大學
電腦與通訊工程所
98
RFID is widely used in daily life, such as money card, building management access control system, map information Guan loan system, road toll systems. In this thesis, we design the passive tag chip and reader chip. The RFID tag is to modulate the data, where the system is divided into five parts: double voltage circuit, voltage regulation circuit, ring oscillator, SPI interface, signal modulation circuit. The reader chip is mainly to demodulate the RF signal to digital code, where the system includes the signal control circuit, ring oscillator, TSPC counters, latches, comparators. These chip are implemented by TSMC 18μm 1P6M process. For passive tag chip, the chip select the mode of ASK / FSK modulation by external control. The ASK modulation rate is 450MHz; and FSK modulation rate is 450M/250MHz. The tag chip area is 0.79 x 0.94 mm2 . In the reader chip, the demodulator is designed with digital type, to receive ASK / FSK signal to recover digital data. The high frequency TSPC counter is used to counter the signal frequency. During one counting time, the data is high when the counting value is over than one threshold. The data can be automatically tracked to find the digital code rather than the convectional PLL approach in the decoder. The demodulator chip area is 0.52 x 0.33 mm2.
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Lin, Wang-Chi, and 林旺旗. "Dual Antenna Semi-passive RFID Tag Design." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/89064576053252303559.
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碩士國立臺灣科技大學
電機工程系
97
This thesis proposed a novel radio frequency identification (RFID) tag based on the multiple input multiple output (MIMO) technique to improve the system performance under multi-path fading environment. For the forward link (Reader to tag), the tag can improve the performance of forward link by processing signals received from two orthogonal polarized antennas. For the reverse link (Tag to reader), the transmit diversity technique is adopted to improve the backscatter signal quality in reverse link. The experiment results demonstrate that the proposed tag is robust against the multi-path fading effect.
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HUNG, CHIEN-FENG, and 洪健峰. "Design of UHF RFID Tag Antennas and Development of RFID Systems." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/xf2f64.
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碩士國立高雄應用科技大學
光電與通訊工程研究所
105
In this article, Design for a radio-frequency identification (RFID) tag antenna mounted on a metallic plane is presented. A prototype antenna was designed for an Alien Higgs-4 chip (input impedance, 10 − j150 Ω and power sensitivity, −19.5 dBm at 925 MHz). The physical dimensions of the tag antenna with a H-slot exciter were adjusted to obtain a conjugate match to the chip impedance. Antenna gain is enhanced by adjusting Metal spacing to optimize capacitive coupling between the radiating plate and metallic plane. By adding a shorting mechansism also shifts the self-resonant frequency to a lower frequency. For an EIRP of 4 W, the maximum read distance exceeded 8 m in the xz and yz planes. However, decreasing the metallic plane to a size smaller than that of the radiating plate substantially decreased the self-resonant frequency. Finally, the near-field detection system comprised a computer; a reader controller (Favite FS-GF-801); Arduino Uno R3; RF switch circuit, Due to use the magnetic-field coupling that can achieve time scanning performance.
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Ko, Chan-An, and 柯建安. "RFID Passive Tag Antenna Design for Metal Materials." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/84458539310445318023.
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碩士義守大學
電機工程學系碩士班
98
Studied in this paper can be used in the steel material in the passive RFID tag antenna design,the band for the UHF, the first single-frequency antenna is 915MHz, using FR4 substrate, a microstrip antenna in the above engraving. FR4 substrate as the back just like a layer of copper, was made out of the back of the microstrip antenna has been equipped with a flat metal material characteristics, of course, steel is one of metal materials. Next came the role of 915MHz, 1.7GHz, 2.4GHz, three bands of tri-band antenna, the same as the substrate is FR4 board to make this three working frequency. The entire production process, beginning with the company through Ansoft HFSS high frequency simulation software, the first two antennas to do this simulation, the simulation is complete the finished size of engraving machines, carving out to. Since the products are now required to be thin, light weight, so a single frequency part, we will reduce the 915MHz of the microstrip antenna to 50x50mm, and S_11 with -17dB, while the RFID-Tag for it, VSWR is 1:2 just can use, is about-9.6dB, and mine is -10dB VSWR is 1.92 for the benchmark, so as long as the operating frequency with the following words at -10dB, are RFID-Tag can be within the scope of work. That multi-band antenna, it is now necessary, and I did the three tri-band antenna working frequency is below -10dB in the range of. Therefore, the completion of this article allows the two RFID Tag antennas are used.
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Lai, Yu-Chang, and 賴佑昌. "Design of RFID Tag Antenna for Life Convenience." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/53197099507189063640.
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碩士國立高雄應用科技大學
光電與通訊研究所
98
The purpose for this thesis is to better our daily life through the antenna design of the RFID tag. By using two different commercial RFID chips as the feed mechanism, antenna design of tags can variably be applied on three various elements, including plastic bag, firework and Watt-hour meter. Dielectric constant and thickness are also altered relatively by the different material surface which RFID is stuck on. These factors cause the conjugate matching effect between tag antenna and chips as well as further affect the read distance of tag antenna. The main theory mentioned in this thesis can effectively overcome these difficulties. In “Symmetrical spiral of the dipole tag antenna for plastic bag applications”, the measured maximum read range is about 5.1 m. In “Design of a miniature bended dipole tag antenna for merchandise on firework”, the measured maximum read range is about 80 cm. In “Design of a matching loop of the dipole tag antenna for Watt-hour meter”, the measured maximum read range is about 9.6 m.
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Liang, Kai-Jun, and 梁凱鈞. "Design of RFID Tag Antenna for Life Application." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/52939849403084652188.
Full textAbstract:
碩士國立高雄應用科技大學
光電與通訊研究所
99
In this thesis, the study mainly focuses on the UHF RFID tag antenna. There are three kinds tag antennas designed for library management, license plate and metal material. The tag antennas attached to the goods have different characteristics because of the goods with different dielectric constant and thickness. When the tag antenna is attached to the different goods, it will significantly affect the impedance mismatching of the antenna and chip IC. In this thesis, the proposed tag antenna can overcome those disadvantages. In “Design of a double loop folded tag antenna for library management ,” the measured maximum read range is about 5.6 m. In “Design of planar dipole antenna with H-shaped loop for license plate,” the read range is 3 m. In “Design of planar dipole antenna with inductively coupling for metal material,” the read range is 1.8 m.
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Wu, Yu-Jie, and 吳育榤. "Design of RFID Tag Antennafor Convenient Storage Management." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/70733847767977394422.
Full textAbstract:
碩士國立高雄應用科技大學
光電與通訊研究所
99
In this thesis, the study mainly focuses on the RFID tag antenna for goods management. There are three kinds of tag antenna designed for library management, clothing tags and metal applications. The result of the tag antennas attached to the goods has their own characteristic because of the goods with different dielectric constant and thickness. These factors cause the impedance mismatching of the antenna and chip IC. In this thesis, the proposed of the tag antenna can be overcome these disadvantages. In “Design of a dual rectangular tuning element tag antenna for library management,” the measured maximum read range is about 8.6 m. In “Design of a square coupled ring tag antenna for clothing tag applications,” the measured maximum read range is about 9.2 m. In “Rectangular Tuning loop of the tag antenna for metal applications,” the measured maximum read range is about 3.1 m. Details of the measured and simulated results of the proposed tag antennas are presented and discussed.
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Chang, Wen-Fan, and 張文帆. "Design of RFID Tag Anetnna for UHF Band." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/43900107577466498009.
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碩士正修科技大學
電子工程研究所
95
Novel and low-cost antennas suitable for RFID-Tag are presented. Dipole antennas, folded dipole antennas, CPW slot antennas have been applied in the proposed designs, and good performance has been obtained. To transmit the maximum power between the antenna and the microchip, it has to be conjugate matching. The operating bandwidths of the proposed antennas can satisfy the requirement of all country. These desirable features of the tag antenna is confirmed by the measured results presented herein.
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Lu, Chi-Feng, and 盧濟豐. "Design and Implementation of High Security RFID Tag." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47934563380765733721.
Full textAbstract:
碩士國立臺灣大學
電機工程學研究所
95
Along with the advancing technologies and completeness of RFID worldwide specifications in the recent years, RFID applications have been commonly adopted and utilized in industry, business environment and getting deeper involved into daily activities, with the rapid growing usages in RFID technologies, many aspects associated with RFID have put to discussion both academically and industrially, most of the discussions were surrounding the subjects of protecting personal privacy and way of safe guarding the stored data during the operation, and yet, many academic papers and research projects have been produced, in fact, many were adopted and used in real industrial situation, but those were often focus in improving the operation procedures or proposing middle ware applications to achieve the security objectives, less discussions and enhance solutions in the hardware, the RFID tag''s security aspect, reasons of those laid on the issues in cost and the actual performance, also the consideration in compatibilities when existing applications and hardware can not cope with new technologies, fortunately, those concerns have the answer, since year 2006, major chip manufacturers in the world have begun their pilot process, producing several contactless chips with equal or have seemly security level as contact chip, and the cost, the greatest constrain in making secure RFID have been reduced, base on the enhancement in chip manufacturing processes, which means, in 2007, the privacy and security issues in RFID could be resolved at the RFID tag level, along with the advancing technology in the RFID. This paper select the RIFD chip SLE66CL41PE announced in November, 2006 by Infineon Technology as the core of the secure RFID tag implementation, this paper covers the RFID tag authentication protocol, memory architecture, and data access condition level (ACL), the proposed protocol and authentication design have been well implemented and the actual performance result would be demonstrated in this paper, the final result of the implementation and those secure authentication schemes not only proving the proposed design was base on solid security foundation in theory, but can also be utilized in real industrial environment without compromises the compatibilities with the existing hardware equipments.
39
Liao, Kuan-Chi, and 廖冠集. "Design of RFID Tag Antennas for Metallic Objects." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/pv4ckz.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
94
In this thesis, UHF radio frequency identification (RFID) tag antennas that can be used on metallic objects are studied. An electromagnetic numerical simulation software package, HFSS, is applied in this study to analyze and design the RFID tag antennas. The types of the tag antennas include the slot antenna, meandered-line antenna, and dipole antenna. The prototypes of the RFID tag designs are fabricated and then measured in the anechoic chambers of NTUST Communication and Electromagnetic Technology Center to verify the performance of those tag antennas. Also, a parameter study is performed to investigate the impedance characteristics of the antennas with respect to antenna geometries. Thus, the technique for designing the UHF RFID tag antennas to be attached on metallic objects is developed.
40
Wu, Hsin-Hong, and 吳信弘. "Design of RFID Tag Antenna for Merchandise Applications." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/61271541554797071201.
Full textAbstract:
碩士國立高雄應用科技大學
光電與通訊研究所
97
The purpose of this thesis is the design of RFID tag antenna for merchandise applications. These are three kinds of antenna are proposed, including dipole antenna, dual dipole and loop antenna. In chapter 2, a dipole antenna with glass substrate is proposed, and it has good omni-directional radiation. It is operating frequency includes both ETSI(860 ~ 865 MHz) and FCC(902 ~ 928 MHz) and JAN(952 ~ 954 MHz). In chapter 3, a symmetrical dual-dipole antenna with a tuming ring for glass application is designed. In this design, the radiation area increases that will increase the gain and efficiency. The antenna also has good omni-directional radiation. The operating frequency covers UHF(860-960 MHz)band. In chapter 4, a dipole antenna eith a loop antenna for glass jar is demonstrated. The dipole antenna is worked for far field operation, and the loop antenna for near field operation. This structure will reduce the influence of the contents in the glass jan.
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Lin, Yueh-Ching, and 林岳敬. "DESIGN OF LOGO-BASED TAG ANTENNAS OF RFID." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46237123021340598826.
Full textAbstract:
碩士大同大學
通訊工程研究所
96
The major purpose of this thesis is to design logo-based tag antennas of RFID. According to different applications, we also adopt different substrates and manufacturing ways. If the company’s logo or brand names are embedded into antennas, it is easy for identification of tag’s company. In this thesis, we design RFID tag antennas based on the Logos of CTCI Corporation and Taiwan Lamination Corporation. We adopt RF techniques and the complex conjugate matching concept from circuit theory for these designs. Through the concepts, the logo-based antenna that we designed has the maximum power transfer and the best efficiency in antenna operation. We realize tag antennas by many methods, for example, PCB etching and gravure printing and vacuum deposition technology. Sometimes, it may cause non-uniform problem of deposited metal thickness in the technology of gravure printing and vacuum deposition manufacturing process. Through eddy current concept from electromagnetic theory, we design a method to measure metal thickness of antenna. It can be fast and easy to check deposited metal thickness, and to correct the production line. Finally, to demonstrate the tag antenna that we design to be possibly realized in business, we show the antenna performance agreement of theory and measurement.
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Jheng, Jhih-Kai, and 鄭至凱. "Design of RFID Tag Antennas for Building Applications." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/99350838887711868860.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
96
This thesis studies the design of RFID tag antennas for building applications . The form of tag antennas include both anti-counterfeit cable tie tag antennas and doorplate tag antennas . An electromagnetic numerical simulation software package , HFSS , is applied to analyze and desige tags in this study . The prototypes of the RFID tag designs will be fabricated later . A parameter study is performed to investigate the impedance characteristics of the antennas with respect to antenna geometries during the simulation , and to expect these two tags could be conformed to the requirement and standard in the application of anti-counterfeit building materials and doorplate information . Also , It will be discussed with the core value of building applications in anti-counterfeit cable tie tag antennas in this study . Patent applications are submitted for the applications of anti-counterfeit cable tie tag antennas.
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Peng, Jhih-Guo, and 彭智國. "A Battery-assisted Passive UHF RFID Tag Design." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/88191383975282428154.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
96
This paper based on a multi-carrier method presents the design of an enhanced passive tag (EPT) that can extend the read range of an EPCglobal Class1 Gen2 (C1G2) tag by attaching a battery-assisted circuit (BAC) to the tag IC. The BAC generates a low power unmodulated continuous wave with frequency outside the tag operating band to supply additional power to the tag. In this work Agilent Advanced Design System software is used to simulate an EPT, which validates that the tag IC can harvest both signal powers from the reader and the BAC. With the same reader transmission power, empirical results demonstrate that a prototype EPT has much longer read range and is more resistant to multipath fading than a regular C1G2 tag. Unlike a semi-passive tag that depends on its local battery to work, a powerless EPT can function as a regular C1G2 tag. That is, an EPT with a charged battery behaves similarly to a semi-passive tag, and can keep working as a regular C1G2 tag after running out of its battery power.
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Li, Ming-Hsien, and 李明憲. "UHF Passive Tag Design for Multi-Carrier RFID Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/57848612189506954242.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
101
Passive RFID system is the most popular system be used all over the world. In this system, a passive RFID tag gains its power from reader emitting electromagnetic wave, and backscatter its responding signal to the reader. However, Because of the large propagation loss, the accessible range of a passive RFID tag is hence limited. In order to mitigate the problems, a multi-carrier UHF passive RFID system utilizes isolated continuous wave emitters to provide additional power to passive RFID tags. This approach however reduces the modulation depth of reader command signals and results in reader signal demodulation error in a passive RFID tag. This work proposes a new passive RFID tag demodulation circuit which can extend the tag read range in a multi-carrier system. Two types of passive RFID tag architecture are proposed. One uses a narrow band impedance matching circuit before the envelope detector to prevent the signal from the continuous wave emitter passing through the demodulator. The other uses a band-pass SAW filter simulator, which is designed according to the specification of a real product, before the envelope detector to suppress the signal from the continuous wave emitter. Simulation results show that both tag designs can overcome the modulation depth constraint, and are in accordance with theoretical analysis. This study uses Agilent Advanced Design System software to simulate a multi-carrier passive RFID system, which is used to verify the proposed passive RFID tag design and to analyze its performance and feasibility.
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Lu, Ying-Hao, and 呂英豪. "Design of UHF RFID Tag Antennas for Metallic Environments." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/w9w9v3.
Full textAbstract:
碩士國立高雄應用科技大學
光電與通訊工程研究所
103
Three UHF RFID tag antennas designed for Alien H4 chip are presented in this thesis. The design techniques of tag antennas applied to around metal environments are especially addressed. The first antenna is a tag antenna with U-shaped slot. It uses an monopole structure to radiate the U-shaped slot on ground. The second antenna is a tag antenna combine a metal ring which is used to the metal container. This design allows the tag to improve the performance to metal effects. The last one is a circularly polarized tag antenna, which is using an L-type coupling feed line to excite horizontal and vertical currents, and adjusting the unequal-size square slot in the four corner to produce the circular polarization wave. This antenna also has a good performance for attaching on the metal environments.
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Liao, Min-Jyun, and 廖敏君. "Miniaturized Design and Measurement of UHF RFID Tag Antenna." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/67458290086335379680.
Full textAbstract:
碩士國立雲林科技大學
電機工程系碩士班
97
Although the origin of radio frequency identification (RFID) technology can be traced back to many years ago, it is only recently that RFID has experience rapid growth. A novel miniaturized UFH RFID tag antenna is presented in this thesis. The antenna is bounded by two circles, the inner and outer diameters of which are 6.5 and 27 mm, respectively. The operating band of the design tag antenna should cover the UHF RFID bands of 922-928 MHz (allocated in Taiwan) and 902-928 MHz (designated in the USA). For compactness, the radiating element of the tag antenna is chosen to be an electric dipole whose two arms are properly meandered. For impedance matching, a double-T matching scheme is employed to achieve the conjugate matching between the dipole and the chip. This thesis proposes three methods for measuring the input impedance of a tag antenna. Also proposed is a non-contact coupling test for checking whether the chip that is already soldered onto the dipole functions or not. Finally, the read ranges of the tag antennas developed in this thesis are measured in the anechoic chamber of NYUST and are found to be about 1 meter.
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Liu, Chia-Ling, and 劉家綾. "Design of RFID Tag Antennas for Metal Material Applications." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/59789830806405267453.
Full textAbstract:
碩士國立高雄應用科技大學
光電與通訊研究所
96
In this thesis, the study mainly focuses on the RFID tag antenna for metal material applications. These antennas are designed based on the use of planar dipole antenna with the commercial tag chip. Three different types of the antenna are proposed for achieving the applications on the metal materials. In “Design of Planar Dipole Antenna with coupled stub for RFID Tag,” a coupled stub is added for achieving required operation and the maximum read range is about 4.9 m. In “Design of Planar Dipole Antenna with matching loop for RFID Tag,” a matched loop and end slot-loaded to RFID tag operation is proposed and the maximum read range is about 3.1 m. In “R2R Manufactured Antenna for RFID Tag,” a triangular open-slot is regarded as the short dipole antenna and the read range is about 4.6 m. With the use of the construction, good manufactured mode of RFID tag can be proceeding quickly.
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Ku, Pau-Wen, and 顧寶文. "900 MHz 8-bit passive CMOS RFID Tag Design." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/98605949660315298677.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
97
This thesis presents a 900MHz 8-bit passive CMOS RFID Tag with 40-stage charge pumps. There is no oscillator in the proposed tag to save power such that the read distance is increased. The tag is fabricated using the TSMC 0.18 μm CMOS process. The measured minimum input power is -16.7dBm, the supply voltage is 0.7V to 1.6V, and the charge pump’s maximum power efficiency is 33% at input power equal to －21 dBm.
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Chen, Wei-Jun, and 陳煒潤. "Chip design and layout for the Passive RFID Tag." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/47482618631951507147.
Full textAbstract:
碩士吳鳳技術學院
光機電暨材料研究所
97
In recent years, due to the rapid development of wireless technology, there is an increasing demand for wireless applications, one of which is radio frequency identification system (RFID). RFID application is very convenient and efficient for the average of daily life, Examples include: building access control management, car alarm chip. This thesis, investigates the passive RFID tag design, including the design of the Rectifier and limitation circuit, Power-on-reset circuit schematic, Detector, data slicer and decoder and Control logic and shift register and IF oscillator. The layout of the chip uses 1P6M 0.18μm CMOS technology.
50
Cho, Chih-Chung, and 卓志忠. "DESIGN OF RFID TAG ANTENNA FOR MOBILE PHONE APPLICATIONS." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/91670520119337496001.
Full textAbstract:
碩士大同大學
通訊工程研究所
96
The main purpose of this research is to study the application of RFID technology on mobile phone. The scope includes mainly on the assessment of the performance of two designed tags. This study first covers the design and optimization of antenna for RFID Tags both of HF (high Frequency) and UHF (Ultrahigh Frequency) band. The HF band RFID tag antenna designed at 13.56MHz and UHF band RFID tag antenna is designed at 915MHz based on complex conjugate matching concept. Through the complex conjugate matching concept, we can achieve the maximum power transfer for a given impedance. Finally, the performance of the designed tags on mobile phones is examined. The measured results suggested that our design can reach the commercial requirements. For the design of RFID tags, the antenna at HF band was successfully fabricated on the very thin FR4 board. Good performance was given by the test results. The designed tags then are used on mobile phones for evaluation of the performance. The results show that application of UHF band tags is not suitable for this kind of application. However, favorable performance can be achieved for the HF band tags.