A fractal circular polarized RFID tag antenna

2013 ◽  
Vol 3 (3) ◽  
Author(s):  
Guesmi Chaouki ◽  
Abdelhak Ferchichi ◽  
Ali Gharsallah
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Rfid Tags ◽  
Simulation Tool ◽  
Fractal Antenna ◽  
Rfid Tag ◽  
Antenna Size ◽  
Radiofrequency Identification

AbstractIn this paper, we present a novel fractal antenna for radiofrequency identification (RFID) tags. The proposed antenna has a resonant frequency equal to 2.45GHz and circular polarization. The fractal technique was very useful to obtain a miniaturization of antenna size by more than 30%. The gain and directivity of the antenna are acceptable for the desired RFID application. All the results are obtained using CST Microwave simulation tool.

Implementation of a RFID-based System for Library Management

2015 ◽  
Vol 6 (3) ◽  
pp. 1-10 ◽  
Author(s):  
Kiyotaka Fujisaki
Keyword(s):  
Resonant Frequency ◽  
Data Exchange ◽  
Electromagnetic Coupling ◽  
Rfid Tags ◽  
Communication Performance ◽  
Rfid Tag ◽  
Library Management ◽  
Rfid System ◽  
Library Catalogue

Using electromagnetic coupling, an RFID tag can get power supplier by a reader and communicate with it for data exchange. Because the RFID system enables non-contact communication, various services and applications including the management of a library catalogue are possible. However, the system is affected easily by neighboring environment and the resonant frequency, thus the communication performance is degraded. In this paper, is used 13.56MHz RFID system for the management of the library. We evaluate the influence that papers or other RFID tags give to the resonant frequency of an RFID tag.

13.56 MHz Organic Transistor Based Rectifier Circuits for RFID Tags

2005 ◽  
Vol 871 ◽  
Author(s):  
Robert Rotzoll ◽  
Siddharth Mohapatra ◽  
Viorel Olariu ◽  
Robert Wenz ◽  
Michelle Grigas ◽  
...  
Keyword(s):  
High Frequency ◽  
Rfid Tags ◽  
Plastic Substrates ◽  
Rfid Tag ◽  
Full Wave ◽  
Organic Transistor ◽  
Solution Cast ◽  
Radiofrequency Identification ◽  
Channel Lengths ◽  
Rectifier Circuits

AbstractOne of the potential application areas for organic and polymers transistors is in radiofrequency identification (RFID) tags. One of the key components of an RFID tag is the front-end rectifier that must rectify a 13.56 MHz AC signal received from a resonant tuned antenna. The rectifier supplies operating power to the tag. Organic transistor circuits have hitherto not operated at this high frequency. We show that by operating pentacene transistors in the non-quasi-static (NQS) regime such operating speeds can be achieved in rectifier circuits. The circuits were fabricated on flexible plastic substrates and employed a solution-cast dielectric. The pentacene mobilities are in the range 0.1-1.5 cm2/V-s. The channel lengths of the transistors are in the range 2-4 μm. Full-wave NQS mode rectifiers were measured to have voltage rectification efficiency in excess of 28% at 14 MHz, demonstrating that such circuits can be used in RFID tags. These circuits operated successfully at speeds up to 20 MHz.

scholarly journals An Efficient Q -Algorithm for RFID Tag Anticollision

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lingyun Zhao ◽  
Lukun Wang ◽  
Shan Du
Keyword(s):  
Large Scale ◽  
Item Information ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Tag Identification ◽  
Rfid Tag ◽  
Iot Applications ◽  
Rfid System ◽  
Collision Problem ◽  
Radiofrequency Identification

In large-scale Internet of Things (IoT) applications, tags are attached to items, and users use a radiofrequency identification (RFID) reader to quickly identify tags and obtain the corresponding item information. Since multiple tags share the same channel to communicate with the reader, when they respond simultaneously, tag collision will occur, and the reader cannot successfully obtain the information from the tag. To cope with the tag collision problem, ultrahigh frequency (UHF) RFID standard EPC G1 Gen2 specifies an anticollision protocol to identify a large number of RFID tags in an efficient way. The Q -algorithm has attracted much more attention as the efficiency of an EPC C1 Gen2-based RFID system can be significantly improved by only a slight adjustment to the algorithm. In this paper, we propose a novel Q -algorithm for RFID tag identification, namely, HTEQ, which optimizes the time efficiency of an EPC C1 Gen2-based RFID system to the utmost limit. Extensive simulations verify that our proposed HTEQ is exceptionally expeditious compared to other algorithms, which promises it to be competitive in large-scale IoT environments.

scholarly journals Experimental Study on Inkjet-Printed Passive UHF RFID Tags on Versatile Paper-Based Substrates

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Han He ◽  
Lauri Sydänheimo ◽  
Johanna Virkki ◽  
Leena Ukkonen
Keyword(s):  
Substrate Material ◽  
Optimal Number ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Wireless Applications ◽  
Efficient Manufacturing ◽  
Nanoparticle Ink ◽  
Pattern Resolution

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

scholarly journals A Fast Hybrid Strategy-Based RFID Tag Identification Protocol

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xinyan Wang
Keyword(s):  
Rfid Technology ◽  
Identification Performance ◽  
Total Response ◽  
Tag Identification ◽  
Hybrid Strategy ◽  
Rfid Tag ◽  
Rfid Systems ◽  
Radiofrequency Identification ◽  
Critical Problems ◽  
Transmission And Reflection

Tag collision is one of the critical problems in radiofrequency identification (RFID) technology which can be widely used to identify objects using tag attachment automatically. Through the transmission and reflection of wireless radiofrequency signals, noncontact identification is realized. However, when multiple tags respond to the reader simultaneously, a collision occurs, significantly degrading the identification performance of RFID systems. To tackle the tag collisions, we propose a fast hybrid strategy-based RFID anticollision (FHS-RAC) protocol. Based on the conventional query tree algorithm, the proposed FHS-RAC makes full use of collision bits and the total response bits to achieve the faster tag identification. Extensive simulations and experiments verify the feasibility and effectiveness of our proposed scheme.

scholarly journals Design of Nested H slot Passive UHF RFID Tag

2020 ◽  
Vol 10 (1) ◽  
pp. 346-349
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Antenna Structure ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Related Information ◽  
Distance Communication ◽  
Passive Rfid

RFID is a short distance communication system which comprises of a RFID tag, a RFID reader and a personal computer with desired software that can maintain the related information. These RFID tags can be of active or passive types. This paper focuses on design, simulation and fabrication of passive ultra-high frequency RFID tag (microchip and an antenna) which resonates at the frequency 866 MHz in the Industrial Scientific Medical Band. The nested H-slot inverted-F microstrip antenna structure is used for the design of passive RFID tag. It examines the specific tag geometry and its characteristics to optimize the PIFA antenna and in turn RFID tag’s performance.

scholarly journals Smart Roadways Ticketing System (SRTS) using RFID tags

2019 ◽  
Vol 8 (2) ◽  
pp. 4298-4301
Keyword(s):  
Rfid Tags ◽  
Card Holder ◽  
Rfid Tag ◽  
Tension Free ◽  
Transport Vehicle ◽  
Straightforward Approach

To provide a comfort, tension free, straightforward approach of traveling and conjointly to scale back the man power. SRTS involves the effective usage of RFID tags and Reed sensor to make ticketing better, through which the tag holds the identity of the card holder and Reed sensor, comprising a sensor and magnet to determine the distance travelled by the user. RFID Tag can be used by the user for just entering and leaving the bus. Depending on the distance which is travelled by the user, money will be deducted from the card well in advance. An object counter is placed adjacently to detect the number of persons entering the transport vehicle

scholarly journals Circular polarization reconfigurable antenna for mid-band 5G applications with a new reconfigurable technique

2020 ◽  
Vol 19 (2) ◽  
pp. 802
Author(s):  
Alaa Imran AL-Muttairi ◽  
Malik Jasim Farhan
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Low Cost ◽  
Axial Ratio ◽  
Maximum Size ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Commercial Software ◽  
Innovative Technique

In this paper, a novel low cost, single-feed, and circular polarization reconfigurable antenna is designed and fabricated for future mid-band 5G applications. An innovative technique is used in this approach, which combines three techniques, namely: polygon U-slot, switchable vertical or horizontal slots, and shorting posts. The proposed antenna can alter its polarization sense between RHCP and LHCP with the ability to adjust the axial ratio position with respect to frequency along the impedance bandwidth of the antenna. The antenna is built on RT/duroid 5880 substrate with a maximum size of (31*31*3.15) .Two real diodes are integrated across the slot to change polarization sense. CST commercial software is used to simulate the antenna, and then it is fabricated and measured practically. Good agreements between the two results are achieved. However, The antenna has impedance bandwidth starting from 3.4995GHz to 3.73GHz with overlapped axial ratio bandwidth of 2.1% for both operation senses. Also, the antenna has good gain, and it has one resonant frequency at 3.6GHz for both operating states.

scholarly journals RFID Antenna for UHF Band

2019 ◽  
Vol 12 (2) ◽  
pp. 28-32
Author(s):  
Nicolae Crișan
Keyword(s):  
North America ◽  
Circular Polarization ◽  
Rfid Tags ◽  
Metallic Surfaces ◽  
Detection Range ◽  
Simulation And Optimization ◽  
Sensing Range ◽  
Simulation Results ◽  
Radio Band ◽  
Uhf Band

Abstract This paper presents a method to increase the detection range for RFID readers in the UHF radio band. The design is following especially the ISO 18000-6C standardization demands for the UHF band, operating from 865 to 868 MHz in Europe and from 902 to 928 MHz in North America. These regulations are allowing the RFID tags to operate near the metallic surfaces and in a wider range than its counterparts at lower frequencies. The paper highlights the advantages offered by the array antenna, especially by the beamforming to increase the reader surveillance zone. The paper describes some additional techniques that are allowing the usage of the circular polarization to increase the reader sensing range and to improuve detection. The design starts with simulation and optimization using HFSS and ends with the measurements that validate the simulation results.

Adaptive Framework for Collisions in RFID Tag Identification

2008 ◽  
Vol 07 (01) ◽  
pp. 9-14 ◽  
Author(s):  
Selwyn Piramuthu
Keyword(s):  
Supply Chain ◽  
Radio Frequency Identification ◽  
Rfid Tags ◽  
Tag Identification ◽  
Seamless Integration ◽  
Essential Information ◽  
Rfid Tag ◽  
Frequency Identification ◽  
Pass Through ◽  
Aloha Protocol

Radio Frequency Identification (RFID) is promising, as a technique, to enable tracking of essential information about objects as they pass through supply chains. Information thus tracked can be utilised to efficiently operate the supply chain. Effective management of the supply chain translates to huge competitive advantage for the firms involved. Among several issues that impede seamless integration of RFID tags in a supply chain, one of the problems encountered while reading RFID tags is that of collision, which occurs when multiple tags transmit data to the same receiver slot. Data loss due to collision necessitates re-transmission of lost data. We consider this problem when Framed Slotted ALOHA protocol is used. Using machine learning, we adaptively configure the number of slots per frame to reduce the number of collisions while improving throughput.

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