scholarly journals Antenna Optimization Using Multiobjective Algorithms

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
X. L. Travassos ◽  
D. A. G. Vieira ◽  
A. C. Lisboa
Keyword(s):  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Multiobjective Problems ◽  
Bowtie Antenna ◽  
Conflicting Objectives ◽  
Frequency Identification ◽  
Identification Tags ◽  
Ground Penetrating ◽  
Multiobjective Algorithms ◽  
Meander Line

This paper presents several applications of multiobjective optimization to antenna design, emphasizing the main general steps in this process. Specifications of antennas usually involve many conflicting objectives related to directivity, impedance matching, cross-polarization, and frequency range. These requirements induce multiobjective problems, which are formulated, solved, and analyzed here for three distinct antenna designs: a bowtie antenna for ground-penetrating radars, a reflector antenna for satellite broadcast systems, and a meander-line antenna for radio-frequency identification tags. Both stochastic and deterministic methods are considered in the analysis.

scholarly journals Design of Meander-Line Antennas for Radio Frequency Identification Based on Multiobjective Optimization

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
X. L. Travassos ◽  
A. C. Lisboa ◽  
D. A. G. Vieira
Keyword(s):  
Radio Frequency ◽  
Method Of Moments ◽  
Radio Frequency Identification ◽  
Optimization Problem ◽  
Geometric Constraints ◽  
Frequency Range ◽  
Frequency Identification ◽  
Identification Tags ◽  
Problem Formulations ◽  
Meander Line

This paper presents optimization problem formulations to design meander-line antennas for passive UHF radio frequency identification tags based on given specifications of input impedance, frequency range, and geometric constraints. In this application, there is a need for directive transponders to select properly the target tag, which in turn must be ideally isotropic. The design of an effective meander-line antenna for RFID purposes requires balancing geometrical characteristics with the microchip impedance. Therefore, there is an issue of optimization in determining the antenna parameters for best performance. The antenna is analyzed by a method of moments. Some results using a deterministic optimization algorithm are shown.

scholarly journals Textronic UHF RFID Transponder

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1093
Author(s):  
Piotr Jankowski-Mihułowicz ◽  
Mariusz Węglarski ◽  
Mateusz Chamera ◽  
Patryk Pyt
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Uhf Rfid ◽  
Coupling System ◽  
Frequency Identification ◽  
Identification Tags ◽  
Small Antenna ◽  
Textile Factory ◽  
The Impact

In order to respond the growing interest towards radio frequency identification textile transponders, the authors propose a new approach to design radio frequency identification (RFID) devices by introducing the RFIDtex concept. The coupling system of inductive loops is implemented in the textronic structure with the RFID interface in order to split the transponder into two independently manufactured components. Then both modules can be easily integrated into the RFIDtex tag. The presented simulation and measurement results prove the concept of manufacturing a relatively small antenna in the form of a meandered dipole sewn in with a single thread, and further, that can be connected to the RFID chip through the coupling system without galvanic junctions. The achieved parameters clearly indicate that the tag can correctly communicate with the read/write device as well as the coupling between its both parts works properly, and the impedance matching is possible in this case. The possibility of confectioning products with electronic identification tags at the textile factory site and improved resistance to the impact of environmental conditions are the main advantage of the proposed approach to the RFID devices designing. The RFIDtex transponder idea proposed by the authors was restricted in the patent no PL 231291 B1.

A review of passive self-sensing tag

Sensor Review ◽  
2017 ◽  
Vol 37 (3) ◽  
pp. 338-345 ◽  
Author(s):  
Yawei Xu ◽  
Lihong Dong ◽  
Haidou Wang ◽  
Jiannong Jing ◽  
Yongxiang Lu
Keyword(s):  
Radio Frequency Identification ◽  
Large Scale ◽  
Low Cost ◽  
Integrated Sensor ◽  
Content Type ◽  
Passive Sensing ◽  
Static Information ◽  
Potential Applications ◽  
Frequency Identification ◽  
Identification Tags

Purpose Radio frequency identification tags for passive sensing have attracted wide attention in the area of Internet of Things (IoT). Among them, some tags can sense the property change of objects without an integrated sensor, which is a new trend of passive sensing based on tag. The purpose of this paper is to review recent research on passive self-sensing tags (PSSTs). Design/methodology/approach The PSSTs reported in the past decade are classified in terms of sensing mode, composition and the ways of power supply. This paper presents operation principles of PSSTs and analyzes the characteristics of them. Moreover, the paper focuses on summarizing the latest sensing parameters of PSSTs and their matching equipment. Finally, some potential applications and challenges faced by this emerging technique are discussed. Findings PSST is suitable for long-term and large-scale monitoring compared to conventional sensors because it gets rid of the limitation of battery and has relatively low cost. Also, the static information of objects stored in different PSSTs can be identified by a single reader without touch. Originality/value This paper provides a detailed and timely review of the rapidly growing research in PSST.

U-Patch Antenna for RFID and Wireless Applications

2011 ◽  
Vol 324 ◽  
pp. 434-436
Author(s):  
R. Abi Saad ◽  
Zeina Melhem ◽  
Chadi Nader ◽  
Youssef Zaatar ◽  
Doumit Zaouk
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Dual Band ◽  
Antenna Structure ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Additional Layer ◽  
Quarter Wavelength ◽  
Frequency Identification

in this paper, we propose a new multi-band patch antenna structure for embedded RFID (Radio Frequency Identification) readers and wireless communications. The proposed antenna is a dual band microstrip patch antenna using U-slot geometry. The operating frequencies of the proposed antenna are chosen as 2.4 and 0.9 (GHz), obtained by optimizing the physical dimensions of the U-slot. Several parameters have been investigated using Ansoft Designer software. The antenna is fed through a quarter wavelength transformer for impedance matching. An additional layer of alumina is added above the surface of the conductors to increase the performance of the antenna.

Reliability evaluation of wearable radio frequency identification tags: Design and fabrication of a two-part textile antenna

2018 ◽  
Vol 89 (4) ◽  
pp. 560-571 ◽  
Author(s):  
Xiaochen Chen ◽  
Leena Ukkonen ◽  
Johanna Virkki
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Integrated Circuit ◽  
High Performance ◽  
Cyclic Strain ◽  
Moist Environment ◽  
Frequency Identification ◽  
Identification Tags ◽  
Cost Efficient ◽  
The One

Passive radio frequency identification-based technology is a convincing approach to the achievement of versatile energy- and cost-efficient wireless platforms for future wearable applications. By using two-part antenna structures, the antenna-electronics interconnections can remain non-stressed, which can significantly improve the reliability of the textile-embedded wireless components. In this article, we describe fabrication of two-part stretchable and non-stretchable passive ultra-high frequency radio frequency identification textile tags using electro-textile and embroidered antennas, and test their reliability when immersed as well as under cyclic strain. The results are compared to tags with traditional one-part dipole antennas fabricated from electro-textiles and by embroidery. Based on the results achieved, the initial read ranges of the two-part antenna tags, around 5 m, were only slightly shorter than those of the one-part antenna tags. In addition, the tag with two-part antennas can maintain high performance in a moist environment and during continuous stretching, unlike the one-part antenna tag where the antenna-integrated circuit attachment is under stress.

Enabling Technologies in an Ambient Intelligence (AmI) System

2010 ◽  
pp. 296-315
Author(s):  
Simrn Kaur Gill ◽  
Kathryn Cormican
Keyword(s):  
Radio Frequency Identification ◽  
Ambient Intelligence ◽  
Reference Model ◽  
New Venture ◽  
New Paradigm ◽  
Everyday Objects ◽  
Enabling Technologies ◽  
Information And Communication ◽  
Frequency Identification ◽  
Identification Tags

This chapter introduces the concept of Ambient Intelligence (AmI) with regard to the enabling technologies and how they are combined to assist e-entrepreneurs. AmI is a new paradigm in the area of Information and Communication Technology (ICT). AmI allows for seamless interaction between the human and technology. The AmI system provides the human user with information and decision support tailored to their specific needs. To achieve seamless interaction between the human and technology requires the environment that surrounds the human to be embedded with technology in everyday objects. These technologies gather information that the AmI system uses to adapt its responses to the human user. The aim of the chapter is to provide a better understanding of the AmI process and knowledge of the AmI system and tools. To this end three of the enabling technologies are discussed: semantic web, multi-modal services, and radio frequency identification tags. These technologies are then examined within the AmI reference model. The reference model provides an understanding of how the technologies can be combined to achieve different AmI features for the human users. This toolkit can be used by a new venture in the area of e-entrepreneurship to provide AmI to service providers, new businesses and traditional industries.

Utilizing Modeling in a Reliability Study of ACA Joints in Humidity Tests

2013 ◽  
Vol 10 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Kirsi Saarinen ◽  
Laura Frisk
Keyword(s):  
Radio Frequency Identification ◽  
Cost Savings ◽  
Experimental Tests ◽  
Shear Stresses ◽  
Cycling Test ◽  
Humidity Level ◽  
Anisotropic Conductive Adhesive ◽  
Frequency Identification ◽  
Identification Tags ◽  
Selection Of

Radio frequency identification tags (RFID) with anisotropic conductive adhesive (ACA) joints are used in various applications where the environmental conditions may impair their reliability. Thus the effects of different environmental stresses on reliability need to be investigated. The purpose of this work was to study whether a relatively simple shear stress model can be utilized in reliability prediction of anisotropically conductive paste (ACP) joints in an accelerated humidity test on the basis of the information obtained from another humidity test. If modeling gives accurate results when studying reliability, the need for actual testing would decrease and thereby time and cost savings could be achieved. In this study, finite element models were made to calculate shear stresses in ACP joints induced by two different humidity tests. Additionally, experimental tests were performed and the results were compared with those of modeling. The test samples were RFID tags whose microchips were attached with ACP. A constant humidity test was used to study the effects of high humidity level and a humidity cycling test was used to examine the effects of constantly varying humidity. In the modeling it was observed that the selection of the stress-free temperature has a significant effect on the results. With three different stress-free temperatures, three different sets of results were obtained. Although the tags saturated in the extreme conditions of the humidity cycling test, according to modeling, the change in relative humidity level in the humidity cycling test did not increase the harshness of the test. However, the temperature change in the humidity cycling test increased the harshness.

scholarly journals Wireless Breast Localization Using Radio-frequency Identification Tags: The First Reported European Experience in Breast Cancer

In Vivo ◽  
2019 ◽  
Vol 34 (1) ◽  
pp. 233-238 ◽  
Author(s):  
UMAR WAZIR ◽  
SALIM TAYEH ◽  
NICHOLAS PERRY ◽  
MICHAEL MICHELL ◽  
ANMOL MALHOTRA ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
European Experience ◽  
Frequency Identification ◽  
Identification Tags
Sign in / Sign up

Export Citation Format

Share Document