scholarly journals Implementation of Low-Cost UHF RFID Reader Front-Ends with Carrier Leakage Suppression Circuit

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Bin You ◽  
Bo Yang ◽  
Xuan Wen ◽  
Liangyu Qu
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Reading Performance ◽  
Uhf Rfid ◽  
Antenna Structure ◽  
Detection Range ◽  
Single Antenna ◽  
Front End ◽  
Rf Front End ◽  
Frequency Identification

A new ultrahigh frequency radio frequency identification (UHF RFID) reader’s front-end circuit which is based on zero-IF, single antenna structure and composed of discrete components has been designed. The proposed design brings a significant improvement of the reading performance by adopting a carrier leakage suppression (CLS) circuit instead of a circulator which is utilized by most of the conventional RF front-end circuit. Experimental results show that the proposed design improves both the sensitivity and detection range compared to the conventional designs.

scholarly journals Design and Implementation of a Novel Directional Coupler for UHF RFID Reader

2016 ◽  
Vol 20 (1) ◽  
pp. 22
Author(s):  
Jianxiong Li ◽  
Shanlin Song ◽  
Xiaoyu Chen ◽  
Hua Nian ◽  
Weiguang Shi
Keyword(s):  
Phase Velocity ◽  
Radio Frequency Identification ◽  
Directional Coupler ◽  
Low Cost ◽  
Uhf Rfid ◽  
Antenna Measurement ◽  
Design And Implementation ◽  
Rfid Reader ◽  
Single Antenna ◽  
Frequency Identification

The directional coupler is applied to isolating RX from TX because of low cost and simplicity compared to the circulator in the radio-frequency identification (RFID) reader. Because of unequal phase velocity between odd and even mode, the drawback of the traditional microstrip directional coupler is poor isolation. In this paper, to obtain a good isolation between RX and TX, a novel directional coupler is proposed to be applied to the UHF RFID system with a single antenna. Measurement result shows that the proposed directional coupler possesses a good isolation of -35dB in operating frequency band.

scholarly journals A Novel Compact CP Antenna with Wide Axial Ratio Bandwidth for Worldwide UHF RFID Handheld Reader

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Waleed Abdelrahim Ahmed ◽  
Feng Quanyuan
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Axial Ratio ◽  
Plane Layer ◽  
Impedance Bandwidth ◽  
Uhf Rfid ◽  
Frequency Identification ◽  
The Right

This study presents a novel compact circularly polarized antenna for universal ultrahigh-frequency (UHF) radio-frequency identification (RFID) handheld reader applications. The antenna is composed of a coplanar waveguide (CPW) L-shaped feedline mounted at the right edge of the square slot at the bottom of the ground plane to realize a circular polarization; a horizontal stub protruded from the right side of the square slot towards the slot centre, and a vertical stub is mounted at the lower left of the square slot. The designed antenna printed on one ground plane layer of a low-cost FR4 substrate with an overall size of 120×120×1.6 mm3. The measurement results show indicate that the fabricated antenna achieves a wide axial ratio (AR) bandwidth of 460 MHz (818–1278 MHz), wide impedance bandwidth of 54.6% (630–1103 MHz), and a measured peak gain of 4.0 dBi. The proposed antenna is a good candidate for compact universal UHF RFID handheld reader applications (840–960 MHz).

A Miniaturized Circularly Polarized Antenna Design for RFID Reader

2014 ◽  
Vol 697 ◽  
pp. 425-428
Author(s):  
Yan Zhong Yu ◽  
Yun Yan Wang ◽  
Yan Ru Chen
Keyword(s):  
Radio Frequency Identification ◽  
High Frequency ◽  
Simple Structure ◽  
Low Cost ◽  
Surface Current ◽  
Antenna Design ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Rfid Reader ◽  
Frequency Identification

A miniaturized circularly polarized (CP) antenna for ultra-high frequency (UHF) radio-frequency identification (RFID) reader is designed in the present paper. For the aim of miniaturizing antenna, the square radiating patch is opened by four T-shape slots. This can extend the route of surface current, as a result the operating frequency drops and the size reduces. In additional two diagonal corners of the radiation patch are truncated by a square to achieve CP operation. The designed antenna is calculated and optimized by HFSS. The optimized antenna exhibits satisfied performances, and is therefore suitable for UHF RFID reader applications. The designed antenna shows the advantages of small size, simple structure, and low cost.

Design and Implementation of the RF Front-End All-Digital Phase-Locked Loop in the UHF RFID Reader

2011 ◽  
Vol 474-476 ◽  
pp. 63-68
Author(s):  
Yan Liang Wang ◽  
Gui Tang Wang ◽  
Wen Juan Liu
Keyword(s):  
Radio Frequency Identification ◽  
Analog Circuits ◽  
Phase Detector ◽  
Uhf Rfid ◽  
Loop Filter ◽  
Digital Phase ◽  
Front End ◽  
Rf Front End ◽  
Front End Module ◽  
Stability And Accuracy

PLL is an important part of the RF front-end module,its performance is directly related to stability and accuracy of the RF base-band signal extracted. A FPGA-based all-digital PLL is implemented in this thesis, Hilbert digital phase detector (HDPD) ,Numerically controlled oscillator (NCO) and FIR digital loop filter module implemented using Verilog language ensure accuracy and stability to Sample input Baseband signal modulated. The experiments confirmed that the all-digital PLL designed in this thesis can overcome the defects of DPLL based on semi-analog circuits; and has high Operating frequency, exact capture time, precision adjustable, simple interface, and so on; can be widely used in radio frequency identification (RFID) and automatic control system.

scholarly journals A triple band modified F-shaped monopole antenna for RFID application

2020 ◽  
Vol 9 (6) ◽  
pp. 2469-2476
Author(s):  
Spoorti Barigidad ◽  
Aishwarya C. Yeshawant ◽  
Sridevi Rao ◽  
Tharunya C. A. ◽  
Tanweer Ali ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Monopole Antenna ◽  
Band Frequency ◽  
Antenna Structure ◽  
High Frequency Structure Simulator ◽  
Frequency Identification ◽  
Triple Band

Radio frequency identification (RFID) is a very prominent technology and is used in object-attached identification and tracking tags. In this paper a triple band monopole antenna is designed to work at 2.2-2.6 GHz (lower RFID band), 5.3-6.8 GHz and 8.7-9.5 GHz (upper RFID band) frequency ranges. The antenna design resembles a modified F-shaped radiator and is built on a low cost easily available FR4 dielectric substrate. Initially an F-shaped radiator with partial ground plane is studied which exhibits the operation at 2.6 and 6.5 GHz. Further, modifying this F-shaped radiator exhibits an additional resonance at 9.2 GHz. Fundamental characteristics such as reflection coefficient (S11), radiation pattern and 3D gain have been analyzed and good results have been obtained. Parametric analysis is carried out to fix the optimized antenna dimensions. All the simulations are carried out using the high frequency structure simulator software (HFSS). The antenna structure is easy to design and produce, and ideal for use in RFID applications.document quickly and accurately, to determine its relevance to their interests, and thus to decide whether to read the document in its entirety.

scholarly journals 3D Printed and Photonically Cured Graphene UHF RFID Tags on Textile, Wood, and Cardboard Substrates

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
M. Akbari ◽  
H. He ◽  
J. Juuti ◽  
M. M. Tentzeris ◽  
J. Virkki ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Rfid Tags ◽  
Direct Writing ◽  
Uhf Rfid ◽  
Passive Uhf Rfid ◽  
Photonic Curing ◽  
Frequency Identification ◽  
3D Printed ◽  
Rfid Antennas

This paper introduces 3D direct writing and microdispensing of graphene ultrahigh frequency (UHF) radio-frequency-identification (RFID) antennas on textile, wood, and cardboard substrates, subsequently cured either by conventional oven or photonically by pulsed Xenon flashes. Photonic-cured passive UHF RFID graphene tags on cardboard, wood, and textile substrates achieve read ranges of 5.4, 4.6, and 4 meters, respectively. These results are superior to those achieved by the oven-cured tags that featured read ranges of 4.8, 4.5, and 3.6 meters, respectively. This work presents the first integration of 3D printing and photonic curing of graphene antennas on low-cost versatile substrates.

Monitoring rock displacement threshold with 1-bit sensing passive RFID tag

2021 ◽  
Author(s):  
Mathieu Le Breton ◽  
Nicolas Grunbaum ◽  
Laurent Baillet ◽  
Éric Larose
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Earth Science ◽  
Low Cost ◽  
New Technology ◽  
Uhf Rfid ◽  
Displacement Threshold ◽  
Frequency Identification ◽  
Passive Rfid

<p>Billions of passive Radiofrequency tags are produced by the Radio-Frequency Identification (RFID) industry every year to identify goods remotely. Enhanced RFID adds the capacity for localisation and sensing that can be used in earth science for long-term and spatially dense monitoring with low-cost tags. Localisation has been used already to monitor displacements of coarse sediment and landslides over several metres. Sensing capabilities have been developed in laboratories, but never implemented on real fields. This work presents the first RFID sensing application in earth science, using the simplest 1-bit sensor to detect millimetric motion of unstable rocks. The application required designing custom RFID tags adapted for outdoor usage at long range, adapting the data acquisition of an existing tag microcircuit, and designing a sensor that triggers when displacement exceeds a few millimetres, which threshold displacement can be adapted for each sensor. In complement, the system embeds displacement sensing to measure larger displacements> 5 mm, using the phase-based measurement already deployed on landslides. The presentation display results from laboratory tests and from an implementation in a real site in Eastern France. The advantages and drawbacks of the method are discussed, as well as the future potential RFID sensors that could monitor unstable terrains.</p><p>Author’s published work on the topic:</p><p>Le Breton, M., Baillet, L., Larose, E., Rey, E., Benech, P., Jongmans, D., Guyoton, F., 2017. Outdoor UHF RFID: Phase Stabilization for Real-World Applications. IEEE Journal of Radio Frequency Identification 1, 279–290.</p><p>Le Breton, M., Baillet, L., Larose, E., Rey, E., Benech, P., Jongmans, D., Guyoton, F., Jaboyedoff, M., 2019. Passive radio-frequency identification ranging, a dense and weather-robust technique for landslide displacement monitoring. Engineering Geology 250, 1–10.</p><p>Le Breton, M., 2019. Suivi temporel d’un glissement de terrain à l’aide d’étiquettes RFID passives, couplé à l’observation de pluviométrie et de bruit sismique ambiant (PhD Thesis). Université Grenoble Alpes, ISTerre, Grenoble, France.</p><p>Le Breton, M., Baillet, L., Larose, É., Rey, E., Jongmans, D., Guyoton, F., Benech, P., 2020. Passive RFID, a new technology for dense and long-term monitoring of unstable structures: review and prospective. (No. EGU2020-19726). Presented at the EGU2020, Copernicus Meetings. https://doi.org/10.5194/egusphere-egu2020-19726</p><p>Le Breton M., 2020, Suivi de terrains instables à l'aide d'un réseau dense de capteurs RFID: Émergence de nouvelles applications, presented at Journées Nationales de Géotechnique et de Géologie de l'ingénieur (JNGG), Jean Goguel Award public session, 2021.</p>

RFID Indoor Localization Techniques

2018 ◽  
pp. 142-192 ◽  
Author(s):  
Yongtao Ma ◽  
Zheng Gao ◽  
Yang Zhao
Keyword(s):  
Radio Frequency Identification ◽  
Indoor Localization ◽  
Low Cost ◽  
Research Area ◽  
Uhf Rfid ◽  
Passive Uhf Rfid ◽  
Frequency Identification ◽  
Active Research ◽  
Passive Rfid ◽  
Key Techniques

Radio frequency identification (RFID) is a technique using two-way radio transmission pattern to transmit information through the device of interrogator (also called reader) and tag. It is considered to be one of the most popular techniques for internet of things (IOT). In this chapter, the authors study indoor localization techniques based on passive UHF RFID, which works around the frequency of 900MHz. Passive RFID has the advantage of reasonable reading distance, non-contact, easy deployment, and low cost. The tags do not need battery and it can harvest power through wireless charging. Due to those advantages, passive UHF RFID positioning has always been an active research area in the past few decades. This chapter discusses the key techniques in passive UHF RFID positioning, which include range-based, range-free, tag-based (device-based), tag-free (device-free), and improved positioning methods. All the techniques studied are suited to be implemented in RFID systems, each of which can be accommodated to a specific application scenario.

scholarly journals Flexible Radio-Frequency Identification (RFID) Tag Antenna for Sensor Applications

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4212 ◽  
Author(s):  
Mohammad Islam ◽  
Touhidul Alam ◽  
Iskandar Yahya ◽  
Mengu Cho
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Low Cost ◽  
System Level ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Sensor Applications ◽  
Frequency Identification ◽  
Flexible Radio ◽  
Read Range

In this paper, an inkjet-printed flexible Radio-Frequency Identification (RFID) tag antenna is proposed for an ultra-high frequency (UHF) sensor application. The proposed tag antenna facilitates a system-level solution for low-cost and faster mass production of RFID passive tag antenna. The tag antenna consists of a modified meander line radiator with a semi-circular shaped feed network. The structure is printed on photo paper using silver nanoparticle conductive ink. The generic design outline, as well as tag antenna performances for several practical application aspects are investigated. The simulated and measured results verify the coverage of universal UHF RFID band with an omnidirectional radiation pattern and a long-read range of 15 ft. In addition, the read range for different bending angles and lifetimes of the tag antenna are also demonstrated.

scholarly journals Small Size and Low Cost UHF RFID Tag Antenna Mountable on Metallic Objects

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Sergio López-Soriano ◽  
Josep Parrón
Keyword(s):  
Radio Frequency ◽  
Transmission Line ◽  
Radio Frequency Identification ◽  
Low Cost ◽  
Experimental Results ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Frequency Identification ◽  
European Regulations ◽  
Metallic Object

Reducing tag size while maintaining good performance is one of the major challenges in radio-frequency identification applications (RFID), in particular when labeling metallic objects. In this contribution, a small size and low cost tag antenna for identifying metal objects in the European UHF band (865–868 MHz) is presented. The antenna consists of a transmission line mounted on an inexpensive thin dielectric which is proximity-coupled to a short-ended patch mounted on FR4 substrate. The overall dimensions of the tag are 33.5 × 30 × 3.1 mm. Experimental results show that, for an EIRP of 3.2 W (European regulations), such a small and cheap tag attains read ranges of about 5 m when attached to a metallic object.

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