scholarly journals Dual-Dipole UHF RFID Tag Antenna with Quasi-Isotropic Patterns Based on Four-Axis Reflection Symmetry

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Chunfang Qin ◽  
Lingfei Mo ◽  
Hongliang Zhou ◽  
Hongjian Zhang
Keyword(s):  
Reflection Symmetry ◽  
Test Results ◽  
Uhf Rfid ◽  
Long Distance ◽  
Rfid Tag ◽  
Practical Applications ◽  
Symmetric Structure

In many RFID practical applications, it is required that reader can effectively read tags which are placed in radiation covering area randomly. In this paper, a passive UHF dual-dipole tag antenna with quasi-isotropic patterns is designed, which can reduce the sensibility of tag read-orientation in a long distance. Two dipoles with four-axis reflection symmetric structure are used, and the two arms of the dipole are bent to fill the space of the antenna. In this way, a quasi-isotropic tag is easier to be obtained. The test results show that the gain deviation of the proposed antenna was less than 3.25 dB, and the maximum reading range in different directions was from 6.9 m to 10.0 m, with better quasi-isotropic performance and reading range than other commercial tags.

scholarly journals Long-Range Monitoring System with PDMS Material

2018 ◽  
Vol 10 (3) ◽  
pp. 974
Author(s):  
Norsaidah Muhamad Nadzir ◽  
M. K. A. Rahim ◽  
F. Zubir ◽  
H. A. Majid
Keyword(s):  
Monitoring System ◽  
Long Range ◽  
Raspberry Pi ◽  
Uhf Rfid ◽  
Long Distance ◽  
Rfid Tag ◽  
Rfid Reader

This paper describes the development of a long range monitoring system that integrates Cottonwood: UHF Long Distance RFID reader module with Raspberry Pi 3. When a UHF RFID tag is within the UHF RFID reader antenna’s range, the unique ID of the tag will be transferred to the Raspberry Pi 3 to be processed. Then, the data will be sent over to the database wirelessly to be managed, stored, and displayed. The paper also describes the measurement done to determine the most suitable thickness of PDMS material so that it could be incorporated as a wearable transponder. After the result is calculated and tabulated, it can be concluded that the most suitable thickness of PDMS material for the transponder is 8 mm.

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.

Design and implementation of a passive UHF RFID tag with a temperature and process compensation oscillator

2015 ◽  
Vol 6 (4) ◽  
pp. 171-184
Author(s):  
Liangbo Xie ◽  
Jiaxin Liu ◽  
Yao Wang ◽  
Chuan Yin ◽  
Guangjun Wen
Keyword(s):  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Design And Implementation

Design of temperature sensor embedded in Passive UHF RFID Tag

2011 ◽  
Vol 25 (5) ◽  
pp. 468-473
Author(s):  
Weifeng Liu ◽  
Yiqi Zhuang ◽  
Zengwei Qi ◽  
Longfei Tang
Keyword(s):  
Temperature Sensor ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid

Comparison of Fabrication Techniques for Flexible UHF RFID Tag Antennas [Wireless Corner]

2017 ◽  
Vol 59 (5) ◽  
pp. 159-168 ◽  
Author(s):  
Riccardo Colella ◽  
Almudena Rivadeneyra ◽  
Alberto J. Palma ◽  
Luciano Tarricone ◽  
Luis Fermin Capitan-Vallvey ◽  
...  
Keyword(s):  
Uhf Rfid ◽  
Rfid Tag
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