scholarly journals Using the zeroth order resonance of an inter‐digital capacitive unit‐cell to design antennas for passive UHF RFID tags

2021 ◽  
Author(s):  
Muhammad Mubeen Masud ◽  
Dipankar Mitra ◽  
Bilal Ijaz ◽  
Irfan Ullah ◽  
Benjamin D. Braaten
Keyword(s):  
Unit Cell ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Zeroth Order ◽  
Passive Uhf Rfid ◽  
Order Resonance

scholarly journals 3D-Printed Graphene Antennas and Interconnections for Textile RFID Tags: Fabrication and Reliability towards Humidity

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Han He ◽  
Mitra Akbari ◽  
Lauri Sydänheimo ◽  
Leena Ukkonen ◽  
Johanna Virkki
Keyword(s):  
Rfid Tags ◽  
High Humidity ◽  
Direct Write ◽  
Uhf Rfid ◽  
Printed Antenna ◽  
Passive Uhf Rfid ◽  
Measurement Results ◽  
One Step ◽  
3D Printed ◽  
Wireless Measurement

We present the possibilities of 3D direct-write dispensing in the fabrication of passive UHF RFID graphene tags on a textile substrate. In our method, the graphene tag antenna is deposited directly on top of the IC strap, in order to simplify the manufacturing process by removing one step, that is, the IC attachment with conductive glue. Our wireless measurement results confirm that graphene RFID tags with printed antenna-IC interconnections achieve peak read ranges of 5.2 meters, which makes them comparable to graphene tags with epoxy-glued ICs. After keeping the tags in high humidity, the read ranges of the tags with epoxy-glued and printed antenna-IC interconnections decrease 0.8 meters and 0.5 meters, respectively. However, after drying, the performance of both types of tags returns back to normal.

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 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.

Indoor Localization Using the Reference Tags and Phase of Passive UHF-RFID Tags

2017 ◽  
Vol 13 (2) ◽  
pp. 69-82 ◽  
Author(s):  
He Xu ◽  
Ye Ding ◽  
Peng Li ◽  
Ruchuan Wang
Keyword(s):  
Production Management ◽  
Indoor Localization ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Passive Uhf Rfid ◽  
Hardware System ◽  
Reference Tags ◽  
Software And Hardware ◽  
Collaborative Information System ◽  
Time And Energy

In recent years, indoor position has been an important role in many applications, such as production management, store management and shelves in supermarket or library. Much time and energy are exhausted because one object cannot be quickly and accurately located. Traditional indoor position systems have some problems, such as complicated software and hardware system, inaccurate position and high time complexity. In this paper, the authors propose an RFID-based collaborative information system, Tagrom, for indoor localization using COTS RFID readers and tags. Unlike former methods, Tagrom works with reference tags and phase of Passive UHF-RFID tags, which improves traditional distribution of reference tags and utilize RF phase replace of traditional RSSI or multipath profile to determine the position of target RFID tags.

scholarly journals Towards Washable Electrotextile UHF RFID Tags: Reliability Study of Epoxy-Coated Copper Fabric Antennas

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Shiqi Wang ◽  
Ngai Lok Chong ◽  
Johanna Virkki ◽  
Toni Björninen ◽  
Lauri Sydänheimo ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Epoxy Coating ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Dipole Antennas ◽  
Washing Machine ◽  
Reliability Study ◽  
Passive Uhf Rfid ◽  
Emission Regulation ◽  
The Impact

We investigate the impact of washing on the performance of passive UHF RFID tags based on dipole antennas fabricated from copper fabric and coated with protective epoxy coating. Initially, the tags achieved read ranges of about 8 meters, under the European RFID emission regulation. To assess the impact of washing on the performance of the tags, they were washed repeatedly in a washing machine and measured after every washing cycle. Despite the reliability challenges related to mechanical stress, the used epoxy coating was found to be a promising coating for electrotextile tags in moist conditions.

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