scholarly journals Miniaturized Multi-Port Microstrip Patch Antenna Using Metamaterial for Passive UHF RFID-Tag Sensor Applications

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1982 ◽  
Author(s):  
Jamal Zaid ◽  
Abdulhadi E. Abdulhadi ◽  
Tayeb A. Denidni
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Sensor Node ◽  
Dielectric Substrate ◽  
Sensor Nodes ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Sensor Applications ◽  
The Difference

In this paper, a miniaturized Ultra High Frequency Radio Frequency Identification (UHF-RFID) tag-based sensor antenna using a magneto- dielectric substrate (MDS) for wireless identification and sensor applications is presented. Two models of RFID tag-based sensors are designed, fabricated and measured. The first model uses two RFID tags; both of the tags are incorporated with two RFID chips. A passive sensor is also integrated in one of the proposed tags to serve as a sensor node, while the other tag is used as a reference node. Based on the difference in the minimum power required to activate the reference and sensor nodes, the sensed data (temperature or humidity) can be determined. The magneto-dielectric substrate layer is placed underneath the patch antenna to reduce the size of the proposed sensor by about 75% compared to a conventional RFID tag-based sensor. The magneto-dielectric layer is thin enough to embed in the planer circuit. To reduce the size of the proposed sensor, a multi-port tag for including the reference and sensor node in one antenna is also presented. The proposed RFID tag-based sensors have several features such as small size, they are completely capable for two objectives at the same time and easy to integrate with a planer circuit.

A design of analog VDD generator for passive UHF RFID Tag in 90 nm CMOS

2014 ◽  
Vol 7 (5) ◽  
pp. 507-513 ◽  
Author(s):  
Smail Hassouni ◽  
Hassan Qjidaa
Keyword(s):  
Radio Frequency Identification ◽  
Schottky Diodes ◽  
Input Power ◽  
Cmos Process ◽  
Uhf Rfid ◽  
Chip Area ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Low Power Dissipation ◽  
Simulation Results

This paper introduces a VDD generator for the ultrahigh frequency (UHF) passive Radio-frequency identification (RFID) tag, consisting of an RF-limiter, an NMOS rectifier, a DC-limiter, and a regulator. The proposed NMOS rectifier utilizes diode-connected native NMOS transistors with ultralow-threshold voltage instead of Schottky diodes. The theoretical equations for predicting the performance of the VDD generator are provided and verified by both simulation results in 90 nm CMOS process. The proposed VDD generator generates a 1.19-V stable output voltage with low-power dissipation and a 26.96% larger power conversion efficiency under conditions of 50 Ω antenna, 900 MHz, −23 dBm input power and 1 M DC output load. The chip area of the proposed VDD generator is only 105 × 85 μm. The simulation results indicated that the presented novel VDD generator is capable to provide efficient, stable, and input-independent power supply for Passive UHF RFID tag

scholarly journals Wearable Passive E-Textile UHF RFID Tag Based on a Slotted Patch Antenna with Sewn Ground and Microchip Interconnections

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Johanna Virkki ◽  
Zhigang Wei ◽  
Aruhan Liu ◽  
Leena Ukkonen ◽  
Toni Björninen
Keyword(s):  
Patch Antenna ◽  
Performance Comparison ◽  
Electrical Performance ◽  
Uhf Rfid ◽  
Patch Type ◽  
Rfid Tag ◽  
Practical Applications ◽  
Textile Materials ◽  
Passive Uhf Rfid ◽  
Electromagnetic Performance

We present a wearable passive UHF RFID tag based on a slotted patch antenna comprising only textile materials (e-textile, textile substrate, and conductive yearn). As a novel manufacturing approach, we realize the patch-to-ground and antenna-to-IC interfaces using only conductive thread and a sewing machine. We outline the electromagnetic optimization of the antenna for body-worn operation through simulations and present a performance comparison between the e-textile tag and a tag produced using regular electronics materials and methods. The measured results show that the textile tag achieves the electrical performance required in practical applications and that the slotted patch type antenna provides stable electromagnetic performance in different body-worn configurations.

scholarly journals Radiation Beam Pattern Control of UHF RFID Tag Antenna Design for Automotive License Plates

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2439
Author(s):  
Youchung Chung ◽  
Teklebrhan H. Berhe
Keyword(s):  
Radio Frequency Identification ◽  
Patch Antenna ◽  
Beam Pattern ◽  
License Plate ◽  
Uhf Rfid ◽  
Long Distance ◽  
Beam Radiation ◽  
Radiation Beam ◽  
Rfid Tag ◽  
On The Road

This paper presents a design of a radio frequency identification (RFID) tag antenna in the ultra-high-frequency (UHF) range, which is applicable to a vehicular license plate attached to a vehicle bumper. The main goals are to first improve the identification ratio by controlling the radiation beam pattern and, second, to control the beam direction. Since every vehicle has a license plate, the available plate structure is used to design the antenna. The shape of the tag is rectangular and has a dimension of 525 mm × 116 mm, which is smaller than the typical size of standard plates, 540 mm × 120 mm, used in Europe and Korea. The fabricated tag antenna, the license plate, and the vehicular bumper are fixed by volt and nut. For vehicle tracking and identification, RFID readers are deployed on the road side. For efficient identification, a long distance passive UHF RFID license plate with a patch antenna is proposed to provide not only line-of-sight identification but also left and right beams. Unlike the general UHF tag antennas, in this paper, the patch antenna is designed to attach to the metal part of the car, the license plate holder. The beam patterns of the RFID tag antenna can be controlled by the patch antenna parameter values. The simulation result demonstrates that the proposed UHF RFID tag antenna has a beam radiation pattern as required at 920 MHz. In addition, the estimated read range of the proposed plate meets the requirement of RFID systems.

scholarly journals Novel Patch Antenna Design for Passive UHF RFID Tag on metallic objects

2014 ◽  
Vol 91 (17) ◽  
pp. 29-32
Author(s):  
Anas Sofi ◽  
Khalid Roky ◽  
Ibrahim Hadj Baraka
Keyword(s):  
Patch Antenna ◽  
Antenna Design ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid

scholarly journals Different Substrate Materials for Designing a Passive UHF RFID Tag Antenna

2019 ◽  
Vol 8 (9S) ◽  
pp. 572-580 ◽  
Keyword(s):  
Radio Frequency Identification ◽  
Impedance Matching ◽  
Dipole Antenna ◽  
Antenna Gain ◽  
Rfid Technology ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Frequency Identification ◽  
Read Range

The Radio Frequency Identification (RFID) technology has been increasingly used for various application such as tracking of products, smart cards, identification, item management, security etc. In this paper, the performance parameter of the passive UHF RFID tag antenna has been studied for four different substrate materials viz., FR4 epoxy, PET, Rogers 4350, Taconic TLY materials. A simple meandered dipole antenna has been designed using a T-match stub for impedance matching of the tag antenna with the attached RFID chip. These different substrates are then designed separately, for the same antenna geometry. The effect of using these substrates on RFID tag antenna parameters such as reflection coefficient, antenna gain, VWSR, radiation pattern, impedance, ease of optimization level, read range, and radiation efficiency are then observed.

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