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Tesis sobre el tema "RFID UHF passive"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Contractor, Bhavik. "Two Dimensional Localization of Passive UHF RFID Tags." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229465514.

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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).

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3

Cremer, Markus. "Digital beamforming techniques for passive UHF RFID tag localization." Thesis, London South Bank University, 2016. http://researchopen.lsbu.ac.uk/1819/.

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Radio-frequency identification (RFID) technology is on the way to substitute traditional bar codes in many fields of application. Especially the availability of passive ultra-high frequency (UHF) RFID transponders (or tags) in the frequency band between 860 MHz and 960 MHz has fostered the global application in supply chain management. However, the full potential of these systems will only be exploited if the identification of objects is complemented by accurate and robust localization. Passive UHF RFID tags are cost-effective, very small, extremely lightweight, maintenancefree, rugged and can

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4

Sajal, Sayeed Zebaul Haque. "Low-Cost Passive UHF RFID Tags on Paper Substrates." Thesis, North Dakota State University, 2014. https://hdl.handle.net/10365/27426.

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To reduce the significant cost in the widespread deployment of UHF radio frequency identification (RFID) systems, an UHF RFID tag design is presented on paper substrates. The design is based on meander-line miniaturization techniques and open complementary split ring resonator (OCSRR) elements that reduce required conducting materials by 30%. Another passive UHF RFID tag is designed to sense the moisture based on the antenna's polarization. An inexpensive paper substrate and copper layer are used for flexibility and low-cost. The key characteristic of this design is the sensitivity of the ante

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5

Wolk, Jonathan E. "Graphical real-time simulation tool for passive UHF RFID environments." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33381.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Includes bibliographical references (p. 115-117).<br>In this thesis, I present the design and implementation of a real-time simulation tool, RFID Vis, that is used to simulate a UHF RFID environment. The simulation tool simulates environments containing to pallets of cases as is common in parts of the supply chain. The simulation tool consists of two parts, a graphical front end which interfaces with the user as well as displays the electromagnetic power present in a given vo

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6

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

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7

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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8

Bhattacharyya, Rahul. "Low-Cost, Passive UHF RFID Tag Antenna-Based Sensors for Pervasive Sensing Applications." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73791.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 161-170).<br>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, h

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9

Li, Tzu Hao. "Open Platform Semi-Passive Ultra High Frenquency Radio Frequency Identi." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20060.

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Radio frequency identi cation (RFID) is a rapidly emerging technology that enables au- tomatic remote identi cation of objects. Passive and semi-passive RFID systems can be distinguished from other forms of wireless systems, because the RFID tags (transponders) communicate by way of backscatter. In addition, passive tags derive their energy from the RF energy emitted by the reader. RFID technology can provide a fully automated data capture and analysis system. Compared to a passive RFID system, an open platform semi-passive UHF RFID tag can provide identi cation, security, low-power (compared

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10

Gao, Bo. "Passive UHF RFID tag using electromagnetic band gap (EBG) material for metallic objects tracking /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MECH%202007%20GAO.

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11

Proffitt, Donnie E. II. "EXPERIMENTAL INVESTIGATION TO INFORM OPTIMAL CONFIGURATIONS FOR DYNAMIC NEAR-FIELD PASSIVE UHF RFID SYSTEMS." UKnowledge, 2013. http://uknowledge.uky.edu/me_etds/29.

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RFID has been characterized as a “disruptive technology” that has the potential to revolutionize numerous key sectors. A key advantage of passive RFID applications is the ability to wirelessly transmit automatic identification and related information using very little power. This paper presents an experimental investigation to inform the optimal configuration for programming passive ultra-high frequency (UHF) RFID media in dynamic applications. Dynamic programming solutions must be designed around the tag’s functionality, the physical programming configuration and environment. In this investig

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12

Dong, Haobo (Haobo Jack). "Passive EPC Class 1 Gen 2 UHF RFID sensor tag For health monitoring applications." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66026.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 101-102).<br>Parkinson's disease (PD) is a chronic and degenerative condition that affects millions of Americans. Current approach of PD evaluation, diagnosis, and treatment is mainly qualitative using the Unified Parkinson's Disease Rating Scale (UPDRS) or the Hoehn and Yahr scale. Assessment of the efficacy of the drugs used is difficult and subjective. A long-term monitoring device that can colle

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13

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 Identifica

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14

Liu, Ran [Verfasser]. "Mapping, Path Following, and Perception with Long Range Passive UHF RFID for Mobile Robots / Ran Liu." Aachen : Shaker, 2018. http://d-nb.info/118659019X/34.

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15

Flieger, Matthias Ludwig. "Entwicklung, Modellierung und Verifikation einer Dual-Feed-Antennenstruktur für leistungsfähige, passive UHF-RFID-Sensoren auf kritischen Oberflächen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-120227.

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Die Weiterentwicklung klassischer, elektronischer Identifikationstechnologien leistet einen wichtigen Beitrag zum technischen Fortschritt in Industrie, Logistik und Gesundheitswesen. Die vorliegende Dissertationsschrift beschreibt die Entwicklung eines Dual-Feed-Antennendesigns für passive UHF-RFID-Transponder auf kritischen Oberflächen. Die zu Grunde liegende Antennenstruktur besteht aus einem Microstrip-Patch unter Verwendung eines verlustarmen Substratmaterials. Dieser erfährt eine Optimierung hinsichtlich seiner Lesereichweite, insbesondere auf kritischen Oberflächen. Ein Zwei-Port-Konzept

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16

Rumens, Christina Victoria. "The integration of stimulus-responsive polymers into passive Ultra-High Frequency Radio Frequency Identification (UHF-RFID) sensors." Thesis, University of Kent, 2016. https://kar.kent.ac.uk/62467/.

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17

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

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18

Taoufik, Sanae. "Fiabilité et analyse de défaillance des tags RFID UHF passifs sous contraintes environnementales sévères." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR009/document.

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Ces dernières années, la technologie RFID (identification par radiofréquence) s’est fortement développée dans de nombreuses applications industrielles parmi lesquelles les secteurs de l’aéronautique et l’automobile où il y a une forte demande en systèmes d’auto-identification fonctionnant dans des environnements difficiles. Dans ce contexte, l'objectif de ces travaux de thèse est d'étudier les effets du stockage thermique sur la fiabilité des tags RFID UHF passifs. Pour ce faire nous avons adopté une méthodologie homogène contribuant de façon significative à atteindre nos objectifs. La premièr

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19

Liu, Ran [Verfasser], and Andreas [Akademischer Betreuer] Zell. "Mapping, Path Following, and Perception with Long Range Passive UHF RFID for Mobile Robots / Ran Liu ; Betreuer: Andreas Zell." Tübingen : Universitätsbibliothek Tübingen, 2014. http://d-nb.info/1163282367/34.

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20

Modaresi, Mahyar. "System and Method for Passive Radiative RFID Tag Positioning in Realtime for both Elevation and Azimuth Directions." Thesis, KTH, Communication Systems, CoS, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24562.

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<p>In this thesis, design and realization of a system which enables precise positioning of RFID tags in both azimuth and elevation angles is explained. The positioning is based on measuring the phase difference between four Yagi antennas placed in two arrays. One array is placed in the azimuth plane and the other array is perpendicular to the first array in the elevation plane. The phase difference of the signals received from the antennas in the azimuth array is used to find the position of RFID tag in the horizontal direction. For the position in the vertical direction, the phase difference

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21

Nguyen, Dat Son. "Développement des capteurs sans fil basés sur les tags RFID uhf passifs pour la détection de la qualité des aliments." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00951402.

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Le but de cette thèse est de développer des capteurs sur la base des tags RFID, des technologies et matériaux disponibles au Vietnam afin de contribuer à résoudre la problématique du contrôle de la qualité des produits alimentaires. En effet la technologie RFID s'est affirmée en importance pour ses applications dans de nombreux domaines. Dans ce contexte, l'identification des produits alimentaires expirés, sans les endommager, est une orientation de recherche très prometteuse. Un tag RFID UHF passif peut aussi être composé de plusieurs puces et plusieurs antennes, chaque couple puce/antenne co

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22

Jebbawi, Khodor. "Etude et réalisation d'un système embarqué UHF appliqué à la récupération de statistiques chez le sportif amateur." Electronic Thesis or Diss., Aix-Marseille, 2020. http://theses.univ-amu.fr.lama.univ-amu.fr/200917_JEBBAWI_711xpp867owr742fklcav366xhj_TH.pdf.

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Cette thèse a été financée par l'ANRT, elle a pour objectif de concevoir et réaliser des antennes spécifiques pour des objets connectés. Plus précisément, l'application finale est dédiée au domaine sportif, afin de récolter les statistiques d’un footballeur amateur grâce à un ballon connecté et une chevillère connectée. Le coeur technologique de ce dispositif est basé sur la RFID. L'architecture du système comporte : une antenne lecteur placée sur le pied du joueur capable de communiquer avec des étiquettes insérées dans le ballon. A la fin du match, les statistiques récoltées par les capteurs

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23

Flieger, Matthias Ludwig [Verfasser], Thomas [Akademischer Betreuer] Geßner, Thomas [Gutachter] Geßner, and Helmut [Gutachter] Seidel. "Entwicklung, Modellierung und Verifikation einer Dual-Feed-Antennenstruktur für leistungsfähige, passive UHF-RFID-Sensoren auf kritischen Oberflächen / Matthias Ludwig Flieger ; Gutachter: Thomas Geßner, Helmut Seidel ; Betreuer: Thomas Geßner." Chemnitz : Universitätsbibliothek Chemnitz, 2013. http://d-nb.info/1214245994/34.

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24

Miranda, Hugo Manuel Oliveira de. "Sistemas RFID UHF." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/16273.

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Mestrado em Engenharia Eletrónica e Telecomunicações<br>O interesse por sistemas de identificação por radiofrequência (RFID) tem aumentado de forma significativa nos últimos anos, principalmente na identificação e tracking de objectos, animais e pessoas através de um modo de comunicação sem fios. Esta comunicação é feita por ondas de rádio que são transmitidas por um leitor, através de uma antena a um identificador (etiqueta) que atribui a um objeto uma identidade única, o chamado código de identificação único. Esta tecnologia não só identifica, mas também armazena dados atribuídos a det

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25

Ghiotto, Anthony. "Conception d'antennes de tags RFID UHF : application à la réalisation par jet de matière." Phd thesis, Grenoble INPG, 2008. http://www.theses.fr/2008INPG0148.

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L'identification par radiofréquence constitue une technologie émergente et très prometteuse pour l'identification des biens et des personnes : automatisation des opérations manuelles, rapidité, informations précises. . . Il existe plusieurs technologies RFID. Dans cette thèse, nous nous intéressons à la technologie UHF passive et plus particulièrement à la conception, caractérisation et fabrication des antennes de tags RFID. En 2007, il s'est vendu plus de 1,7 milliard de tags RFID. En vue de réduire le coût de ces derniers, nous abordons leur fabrication par une technique très prometteuse qui

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Seemann, Kay. "Analyse und Verhaltensmodellierung des HF-Frontends von passiven CMOS-Transpondern für UHF-RFID-Anwendungen." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=984934758.

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Pires, Walter Alexandre Ribeiro. "Antenas inteligentes em têxteis." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18709.

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Mestrado em Engenharia Eletrónica e Telecomunicações<br>A tecnologia RFID tem vindo a ganhar popularidade no mercado global atual, dado que a capacidade de comunicação por ondas de rádio com praticamente qualquer objeto, a simplicidade, credibilidade e reduzido custo justi cam o crescente interesse e investimento nesta tecnologia. A indústria têxtil é um setor de atividade extenso e multifacetado, que desenvolve e fabrica produtos para aplicações bastante diferenciadas, onde a aplicabilidade da tecnologia RFID pode trazer inúmeras vantagens nesta indústria, uma vez que a aposta em inova

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28

Daiki, Mossaab. "Contribution au développement d’antennes lecteurs champ proche pour les systèmes RFID UHF passifs." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENT020/document.

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La RFID est une technologie majeure qui connaît depuis plus d'une dizaine d'années un essor considérable en termes d'applications. Cependant son déploiement à grande échelle reste limité par des plusieurs verrous technique et technologique par lesquels la portée de lecture des tags et leur forte sensibilité à l'environnement de l'application. Le travail engagé dans cette thèse vise le développement des nouvelles antennes lecteurs pour systèmes RFID UHF champ proche. Ce type de système exploite la bande UHF de la RFID en zone de champ proche pour la traçabilité des cibles de taille miniature su

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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 da

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Ghetti, Gabriele. "Localizzazione di tag passivi non lineari." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14276/.

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In questo lavoro di tesi è stato realizzato un software di elaborazione dei segnali ricevuti da una etichetta (tag) RFID chipless con l’obiettivo di stimare la distanza del tag rispetto alla posizione dei ricevitori. Questo progetto trova importanti applicazioni legate alla localizzazione sia in ambito hi-tech che di largo consumo, come ad esempio la logistica, l’automotive e i sistemi di automazione. In questo progetto è stato curato specificamente il processo di acquisizione ed elaborazione dati, processando al calcolatore con l’ausilio del software MATLAB® i risultati provenienti da u

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31

Li, Ming-hsiang, and 李明翔. "MIMO UHF Passive RFID Tag." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/04760303539379187919.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>103<br>Due to the long read range, the performance of Ultra High Frequency (UHF) Identification (RFID) system can be easily affected by multi-path fading. To overcome the preceding problem, a MIMO UHF passive RFID tag, operating at 925 MHz, complied with the regulation of Taiwan, is proposed in this thesis. With different polarizations of transmitter, we measure the tag backscatter power .The experimental results verify the effects of tag against multi-path fading. The structure of the dual antenna tag is referred to the structure of analog front-end circuit of Wirel

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32

Huang, Yi-Shan, and 黃譯賢. "UHF Passive Circuit Design for RFID Transponder." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/30582073392265466000.

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碩士<br>國立暨南國際大學<br>電機工程學系<br>100<br>In this thesis, an UHF 915MHz passive circuit design for RFID transponder is proposed by using TSMC 0.18μm Mixed Signal/RF 1P6M CMOS process. The passive circuit consists of a voltage multiplier, a voltage limiter, a voltage reference, a regulator, an oscillator and a digital signal control circuit. The chip area only requires 0.72 × 0.79mm^2 with I/O pads. The power for front-end circuit is harvested from the incident UHF radio waves. In order to increase output voltage and power efficiency, we used zero threshold voltage of native CMOS device to establish 1

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Ko, Yi-Hsin, and 柯宜欣. "A Highly Efficient UHF Passive CMOS RFID Tag." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/9636kw.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>99<br>This thesis presents an UHF passive radio-frequency-identification (RFID) tag chip. This tag is applicated in RFID indoor localization system. The system operates at dual bands: the 2.45GHz continue wave for charge the tag and backscattering the RF data to the Reader; the other band, 925MHz or 866.4MHz for receiving and decoding the modulated signal. For the indoor localization system, this thesis designs a low power consumption RFID Tag. We remove the regulator and the oscillator, which are known to consume a large amount of power. The lowest RF power that our

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Lin, Ying-Te, and 林穎德. "Performance Testing Method for RFID UHF Passive Tags." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/n4f3k7.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>99<br>The general manufacturing production machine of UHF passive RFID, the technology of online inspection is used in near field to read the serial number tag successfully or not in order to measure that the electronic tag is good or bad and to determine high and low production quality, but it cannot show further tag performance. This study research provides a short distance performance testing method by using passive tag and use the EPCglobal static test method to measure the turn on power, and test received signal strength indication in this condition. By the tr

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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.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>96<br>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 tra

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Tan, Jie-wei, and 譚介瑋. "925MHz UHF Passive RFID System with Backscatter Diversity." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/12786429913605063570.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>100<br>The multi-path fading problem causes Ultra High Frequency (UHF) Radio Frequency Identification (RFID) system performance degradation. To overcome this problem, a 925MHz RFID system with backscatter diversity that complies with Taiwan regulations is proposed in this thesis. The proposed system is composed of RFID tag with backscatter diversity and its corresponding reader. In the forward (Reader to tag) link, the RFID tag uses selective combining technique to improve its performance. In the reverse (Tag to reader) link, the tag backscatters space-time block cod

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Chang, Yu-Hung, and 張郁宏. "Channel Measurement of MIMO UHF Passive RFID Systems." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/d7nczp.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>Wireless communications have been used pervasively in various applications in recent years. In the field of wireless communication, Radio Frequency Identification (RFID) is a communication system that has developed many applications. Therefore, there have been lots of literatures discussing the related fields of radio frequency identification, including the design of readers and tags, single input single output (SISO) and multiple input multiple output (MIMO) system implementation and performance analysis, as well as for the radio frequency identification chan

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Chiang, Jia-Hua, and 羌家輝. "Design of Small UHF Passive RFID Transponder Antennas." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/27j23n.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>95<br>The characteristics of the transponder antennas for radio frequency identification system (RFID) have been investigated in this discussion. The electro-magnetic numerical software HFSS have been applied to analyze and design the antennas. Our work discuss the relation between the changes of the antenna structure and its equivalent impedance. We have adapted folded dipole antenna as the prototype. The content of the design is as follow: The fractal-like loaded geometry can be utilized to miniaturize antennas. In addition, the properties of fractals make them

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Li, Ming-Cheng, and 李明橙. "Performance Analysis for MIMO UHF Passive RFID Systems." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/k4752m.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>104<br>The multi-path fading causes signal interference and unstable link quality easily for Ultra High Frequency (UHF) Radio Frequency Identification (RFID) systems. To overcome this problem, a 925MHz Multi-input Multi-output (MIMO) UHF passive RFID tag and its corresponding reader are realized in this thesis. In this work, we use the Ettus Research's Universal Software Radio Peripheral (USRP), which is a software defined radio (SDR) platform, to implement a reader for MIMO UHF passive RFID tag. In the forward (Reader to Tag) link, the RFID tag with antenna o

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Tsai, Yu-Sheng, and 蔡友盛. "UHF Passive RFID Transponder with the AES Security Mechanism." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/70819628549551916322.

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Wu, Hsin-Hung, and 吳信宏. "A Novel Reader Design for UHF Passive RFID System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/91559671674549919225.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>95<br>In this thesis, we discuss the “fading effect” in the multipath environment and explain how it influences the RFID system. Then, we propose a novel reader architecture to solve this problem. We construct a measurement system and use two separate antennas to receive the backscattered field from the tag. After some signal processes, the combining method is used to combine these two branches. Finally, we use the coherent detection method to detect the resultant signals. Through this procedure, the readability will be increased and fading effect will be combated.

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Cheng, Kung Wei, and 鄭功蔚. "The Application of Passive UHF RFID on Indoor Positioning." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/88475093461553995113.

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碩士<br>國立宜蘭大學<br>資訊工程學系碩士班<br>103<br>Nowadays technology and smart mobile devices are getting more and more popular. The growing speed of technologies is rapid. People now will not only have one smart mobile device with them but instead perhaps two or three are carried along. With the full function of smart mobile devices almost all are coming with Global Position System-enabled (GPS-enabled). The GPS has become a must accessory in a smart mobile device. GPS was made for outdoor positioning so it works perfectly at outdoors. However, the limitation of GPS is it cannot provide the same service a

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ZongYing, Kuo, and 郭宗穎. "UHF Passive Front-End Circuit Design for RFID Transponder." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/60954636220414916133.

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碩士<br>國立暨南國際大學<br>通訊工程研究所<br>99<br>In this thesis, an UHF 915MHz passive front-end circuit design for RFID transponder is proposed by using TSMC 0.18μm Mixed Signal/RF 1P6M CMOS process. The passive front-end circuit consists of a voltage multiplier, a voltage limiter, a voltage reference, a regulator, a demodulator, an oscillator, a divider and a power-on-reset circuit. The chip area only requires 0.78 × 0.64mm^2 with I/O pads. The power for front-end circuit is harvested from the incident UHF radio waves. In order to increase output voltage and power efficiency, we used zero threshold voltag

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Chen, Jiun-Fan, and 陳俊帆. "A UHF Passive RFID Transponder for Sensing Environmental Parameters." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/20100808739814639982.

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碩士<br>元智大學<br>電機工程學系<br>97<br>In this thesis, we implement a front-end circuit of Ultra High Frequency (UHF) passive Radio-Frequency Identification (RFID) tag, including RF-DC converter and regulator. Thorough analysis of the RF to DC circuit are presented analytically, focusing on the loss of the parasitic capacitor and resistance, the relationship between the input voltage and the n-th stage of the rectifier circuit and the number of stages versus the output voltage. The chip is fabricated in standard TSMC 0.35um CMOS 2P4M process and the function of each block in the chip is measured respec

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Kuo, Che-Jung, and 郭哲榮. "The Analysis of Multi-Carrier UHF Passive RFID Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/78695012310534459598.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>96<br>In recent years, the applications of passive RFID systems have gained more attentions. Because a tag must obtain its operating power from a continuous wave transmitted from a reader In a passive RFID system, the readable range is hence limited. Consequently many researches on readable range extension have been proposed. In this thesis, we use a multi-carrier method to supply the operating power of a passive tag. In an interrogation region, continuous wave emitters, which provide additional operating power to passive tags, are deployed following the similar m

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Wu, Hsin-Hung. "A Novel Reader Design for UHF Passive RFID System." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1907200711331600.

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Gautham, Ananyaa. "Practical evaluation and analysis of passive UHF RFID tags." 2008. http://hdl.handle.net/10106/1002.

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Chang, Cheng-Hung, and 張正弘. "Tags design and RCS analysis for passive UHF RFID." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/39259164184862478873.

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碩士<br>元智大學<br>通訊工程學系<br>96<br>This thesis is devoted to the design, fabrication and testing of tags for passive UHF radio-frequency identification (RFID) system. RI-UHF-STRAP-08 form TI is identified at the chip IC strap for the tag due to its relative low DC power consumption. While the chip impedance of the tag IC was characterized through TRL calibrated measurement system, complex conjugate matching technique at desired frequency was adopted. In order to achieve good power match, across the entire frequency band of operation, quasi log-periodic antenna scheme was implemented . The tested ma

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Hong, Ya-Chi, and 洪雅琦. "A Passive UHF RFID Tag for RF-sensor Application." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/34959334702183730051.

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碩士<br>元智大學<br>電機工程學系<br>96<br>In this thesis, a passive UHF 925MHz RFID tag for RF-sensor is presented. The proposed RFID tag circuit includes the CMOS RF to DC rectifier, ASK demodulator, ASK modulator, logic and control circuit, and power on reset. The 925MHz RFID tag matches the EPC Gen-2 specifications, where the data rate is 640K/s. The maximum power that the tag received is 180uW. The totally power consumption of the tag in this work is 57uW, and it is totally supplied from the antenna received. This whole circuit is implemented in the TSMC 0.35um CMOS 2P4M standard process, and its siz

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Lin, Pei-Ju, and 林倍如. "Implementation of Passive UHF-RFID Location Aware Prototype System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/71674732546924121240.

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碩士<br>義守大學<br>電子工程學系碩士班<br>98<br>Radio Frequency Identification (RFID) has been considered as an attractive method for the ubiquitous computing. One area of ubiquitous computing is composed by the location-aware systems, systems where applications are designed to estimate the coordinates of tracking objects in qualified vicinity or in correlation to reference locations. The passive UHF RFID system is an attractive solution for location awareness applications. Passive UHF RFID tags have gained significant popularity due to their low cost, small footprint, ability to function without batteries,

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