Design of Miniaturized Fractal RFID Tag Antenna with Forced Impedance Matching

2012 ◽  
Vol 2 (5) ◽  
pp. 129-139 ◽  
Author(s):  
D. K. Naji ◽  
J. S. Aziz ◽  
R. S. Fyath
Keyword(s):  
Impedance Matching ◽  
Rfid Tag

INTEGRATING MICROARRAY PROBES AND AMPLIFIER ON AN ACTIVE RFID TAG FOR BIOSENSING AND MONITOR SYSTEM DESIGN

2009 ◽  
Vol 21 (06) ◽  
pp. 421-425
Author(s):  
Jium-Ming Lin ◽  
Po-Kuang Chang ◽  
Zhong-Qing Hou
Keyword(s):  
Impedance Matching ◽  
Electrical Contact ◽  
Thin Film Transistor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Monitor System ◽  
Matching Problems ◽  
Rfid Tag ◽  
Active Rfid ◽  
Contact Property

This research provides a microarray bio-probe device, integrated with Thin-Film-Transistor (TFT) amplifier formed of top-gate MOS (Metal-Oxide Semiconductor) transistors on an active RFID tag, to improve the signal-to-noise (S/N) ratio and impedance matching problems. The bio-probe device can be disposed to conform to the profile of a living body's portion so as to improve the electrical contact property.

Design and Analysis of UHF RFID Tag Antenna on the Surface of Cylinder

2014 ◽  
Vol 541-542 ◽  
pp. 458-461
Author(s):  
Pu Yu Duan ◽  
Dong Wang
Keyword(s):  
Plane Surface ◽  
Impedance Matching ◽  
Dipole Antenna ◽  
Cylinder Surface ◽  
Uhf Rfid ◽  
Logistics Industry ◽  
Rfid Tag ◽  
The Impact ◽  
Meander Line ◽  
Read Range

Cylinder is a common object and used in logistics industry, such as liquid container like wine. The performance of tags that are used on these objects declines, especially the read range and the radiation pattern of the tag. In this paper, a type of UHF tag antenna directly mountable on the cylinder surface. In order to reduce the impact of the deformation, the tag is designed with meander-line but not symmetrical. Antenna is combined with T-matching network to ensure good impedance matching. Compared with the basic dipole antenna tag both cylinder and plane surface, we can get the prominent feature of the tag proposed in this paper.

scholarly journals Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Lingfei Mo ◽  
Chenyang Li
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Rfid Tags ◽  
Manufacturing Cost ◽  
Planar Antenna ◽  
Double Loop ◽  
Uhf Rfid ◽  
Rfid Tag

Planar UHF RFID antimetal tag can be widely used for the metallic products or packages with metal material inside. A double loop inductive feed planar patch antenna is proposed for UHF RFID tag mounted on metallic objects. Compared to conventional microstrip antennas or PIFA antennas used for UHF RFID tags, the double loop inductive feed patch antenna has a planar structure, with no short via or short wall, which could decrease the manufacturing cost of the tags. The double loop inductive feed structure also increases the radiation performance of the planar antenna. Moreover, the double loop inductive feed structure makes the impedance of the patch antenna be tuned easily for conjugate impedance matching.

scholarly journals A Compact Broad-band UHF RFID Tag Loaded with Triangular SRR Arrays

2018 ◽  
Vol 7 (2) ◽  
pp. 48-52 ◽  
Author(s):  
A. K. K. John ◽  
T. Mathew
Keyword(s):  
Impedance Matching ◽  
Broad Band ◽  
Dipole Antenna ◽  
The Other ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Read Range ◽  
Compact Planar

A novel compact planar UHF RFID tag with broadband operation and enhanced read range characteristics are presented. The structure of the tag consists of a T- matched dipole antenna whose arms are orthogonally loaded with Triangular SRR arrays. Triangular SRR arms loaded in the structure produce compactness and good impedance matching which is needed for maximizing the read range. The measured results shows that the projected tag shows a highest read range of 9.6 meter in the European UHF RFID band of 866 MHz and significantly better read range in the other UHF RFID bands in the 860-930 MHz range . Measured read range differences over the azimuth and elevation angular ranges are also suggested.

scholarly journals Omega-Shaped Tag Antenna with Inductively-Coupled Feeding Using U-Shaped Stepped-Impedance Resonators for RFID Applications

2020 ◽  
Vol 35 (8) ◽  
pp. 951-961
Author(s):  
Adam Alhawari ◽  
Abdulkarem Almawgani ◽  
Hisham Alghamdi ◽  
Ayman Hindi ◽  
Tale Saeidi ◽  
...  
Keyword(s):  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Feeding Method ◽  
Rfid Tag ◽  
Inductively Coupled ◽  
Feeding Technique ◽  
Frequency Identification ◽  
Overall Performance ◽  
Rfid Applications ◽  
Peak Gain

This study proposes a new omega-shaped tag antenna with inductively-coupled feeding (ICF) using U-shaped stepped- impedance resonators (SIRs). It aims at improving the performance of the tag antennas for Radio Frequency Identification (RFID) applications. The radiating body of the antenna is fed using two mirroring symmetrical U-shaped SIRs. This antenna is a simpler alternative for the existing antennas that match the impedance of the antenna to the chip impedance effectively applying varied reinforcement of the equivalent inductance of the radiating structure. In addition to the use of an omega-shaped structure, the proposed feeding technique boosts performance of the antenna impedance, dimensions, and peak gain. The measured size of the antenna was 50×55.55×1.6 mm3. It attains a peak gain of 1.8 dBi and radiation efficiency higher than 85% at its operating frequency. The experimental results revealed that this tag antenna has the characteristic of good impedance matching within the frequency range of 900-940 MHz, corresponding to a better power reflection coefficient of -3 dB. Comparison between the measured and simulated results verified that the proposed feeding method is capable to improve overall performance of RFID tag antennas.

scholarly journals A wearable UHF RFID tag antenna-based metamaterial for biomedical applications

2020 ◽  
Vol 9 (2) ◽  
pp. 676-684
Author(s):  
Abdelhadi Ennajih ◽  
Badr Nasiri ◽  
Jamal Zbitou ◽  
Ahmed Errkik ◽  
Mohamed Latrach
Keyword(s):  
Impedance Matching ◽  
Relative Dielectric Constant ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Depth Study ◽  
Miniature Antennas ◽  
Miniature Antenna ◽  
Reading Distance ◽  
Good Agreement ◽  
Made In

The development of miniature antennas for bio-medical applications has attracted the attention of many researchers in the last years. In this letter, we provide a miniature antenna for the RFID tag for identifying patients in African and European hospitals. The proposed antenna is designed on a flexible silicon substrate with a relative dielectric constant of 11.9 and a thickness of 1.6mm. An in-depth study of the proposed wearable antenna was made in free space and on human tissue. The achieved results showed good performance in terms of miniaturization, bandwidth, impedance matching and, reading distance. The presented tag antenna is designed and simulated by using CST-MWS solver and the results were validated by HFSS and both results are in good agreement.

scholarly journals Tunable Platform Tolerant Antenna Design for RFID and IoT Applications Using Characteristic Mode Analysis

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Abubakar Sharif ◽  
Jun Ouyang ◽  
Feng Yang ◽  
Rui Long ◽  
Muhammad Kamran Ishfaq
Keyword(s):  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Cost Effective ◽  
Metal Plate ◽  
Impedance Match ◽  
Mode Analysis ◽  
Characteristic Mode ◽  
Rfid Tag ◽  
Frequency Identification ◽  
Read Range

Radio frequency identification (RFID) is a key technology to realize IoT (Internet of Things) dreams. RFID technology has been emerging in sensing, identification, tracking, and localization of goods. In order to tag a huge number of things, it is cost-effective to use one RFID antenna for tagging different things. Therefore, in this paper a platform tolerant RFID tag antenna with tunable capability is proposed. The proposed tag antenna is designed and optimized using characteristic mode analysis (CMA). Moreover, this tag antenna consists of a folded patch wrapped around FR 4 substrate and a feeding loop element printed on a paper substrate. The inductive feeding loop is stacked over folded patch and it provides impedance match with RFID chip. Because of separate radiating and feeding element, this tag antenna has a versatility of impedance matching with any RFID chip. Furthermore, this tag is able to cover American RFID band (902–928 MHz) and can be tuned to European RFID band (865–868 MHz) by adding tunable strips. In order to demonstrate platform tolerant operation, the read range of RFID tag is measured by mounting it on different materials. The maximum read range of RFID tag is 4.5 m in free space or on dielectrics and 6.5 m above 200 × 200 mm2 metal plate, respectively.

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