scholarly journals A Novel Printable Tag of M-Shaped Strips for Chipless Radio-Frequency Identification in IoT Applications

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2116
Author(s):  
Wazie M. Abdulkawi ◽  
Khaled Issa ◽  
Abdel-Fattah A. Sheta ◽  
Saleh A. Alshebeili
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Low Cost ◽  
Center Frequency ◽  
Spatial Density ◽  
Tag Identification ◽  
Horizontal Polarization ◽  
Iot Applications ◽  
Frequency Identification ◽  
Coding Capacity

There is a growing interest in chipless radio-frequency identification (RFID) technology for a number of Internet of things (IoT) applications. This is due to its advantages of being of low-cost, low-power, and fully printable. In addition, it enjoys ease of implementation. In this paper, we present a novel, compact, chipless radio-frequency identification (RFID) tag that can be read with either vertical or horizontal polarization within its frequency bandwidth. This increases the sturdiness and detection ability of the RFID system. In addition, the difference between the vertical and horizontal responses can be used for tag identification. The proposed tag uses strip length variations to double the coding capacity and thereby reduce the overall size by almost 50%. It has a coding capacity of 20 bits in the operating bandwidth 3 GHz–7.5 GHz, and its spatial density is approximately 11 bits/cm2. The proposed tag has a 4.44 bits/GHz spectral capacity, 2.44 bits/cm2/GHz encoding capacity, a spatial density at the center frequency of 358.33 bits/λ2, and an encoding capacity at the center frequency of 79.63 bits/λ2/GHz. A prototype is fabricated and experimentally tested at a distance of 10 cm from the RFID reader system. Then, we compare the measured results with the simulations. The simulated results are in reasonable agreement with the simulated ones.

scholarly journals A Survey of NFC Sensors Based on Energy Harvesting for IoT Applications

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3746 ◽  
Author(s):  
Antonio Lazaro ◽  
Ramon Villarino ◽  
David Girbau
Keyword(s):  
Energy Harvesting ◽  
Integrated Circuits ◽  
Radio Frequency Identification ◽  
Low Cost ◽  
Near Field ◽  
Wearable Sensors ◽  
Cold Chain ◽  
Iot Applications ◽  
Wide Range ◽  
Frequency Identification

In this article, an overview of recent advances in the field of battery-less near-field communication (NFC) sensors is provided, along with a brief comparison of other short-range radio-frequency identification (RFID) technologies. After reviewing power transfer using NFC, recommendations are made for the practical design of NFC-based tags and NFC readers. A list of commercial NFC integrated circuits with energy-harvesting capabilities is also provided. Finally, a survey of the state of the art in NFC-based sensors is presented, which demonstrates that a wide range of sensors (both chemical and physical) can be used with this technology. Particular interest arose in wearable sensors and cold-chain traceability applications. The availability of low-cost devices and the incorporation of NFC readers into most current mobile phones make NFC technology key to the development of green Internet of Things (IoT) applications.

scholarly journals A Comparison of RFID Anti-Collision Protocols for Tag Identification

2018 ◽  
Vol 8 (8) ◽  
pp. 1282 ◽  
Author(s):  
Nikola Cmiljanic ◽  
Hugo Landaluce ◽  
Asier Perallos
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Communication Channel ◽  
Tag Identification ◽  
Collision Problem ◽  
Key Technologies ◽  
Different Types ◽  
Radio Frequency Signals ◽  
Frequency Identification ◽  
The Internet Of Things

Radio Frequency Identification (RFID) is a technology that uses radio frequency signals to identify objects. RFID is one of the key technologies used by the Internet of Things (IoT). This technology enables communication between the main devices used in RFID, the reader and the tags. The tags share a communication channel. Therefore, if several tags attempt to send information at the same time, the reader will be unable to distinguish these signals. This is called the tag collision problem. This results in an increased time necessary for system identification and energy consumption. To minimize tag collisions, RFID readers must use an anti-collision protocol. Different types of anti-collision protocols have been proposed in the literature in order to solve this problem. This paper provides an update including some of the most relevant anti-collision protocols.

A New Scheme on XOR Operation for Low-Cost RFID

2013 ◽  
Vol 303-306 ◽  
pp. 2207-2210 ◽  
Author(s):  
Ming Li ◽  
Zhao Peng Dai ◽  
Fang Xi
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Random Number ◽  
Low Cost ◽  
Random Number Generator ◽  
Number Generator ◽  
High Complexity ◽  
Xor Operation ◽  
Frequency Identification ◽  
The Relationship

In order to overcome the high complexity of the tag in RFID, a new XOR scheme is proposed based on the relationship between X and Z for X XOR (X + On) =Z. As only XOR and random number generator are required to be computed by tags，it is very suitable for low—cost Radio Frequency Identification(RFID) system .

scholarly journals Miniaturized Chipless RFID Tags Based on Periodically Loaded Microstrip Structure

2019 ◽  
Vol 9 (5) ◽  
pp. 4679-4684
Author(s):  
M. Added ◽  
K. Rabaani ◽  
S. Chabaan ◽  
N. Boulejfen
Keyword(s):  
Radio Frequency Identification ◽  
Low Cost ◽  
Resonant Circuit ◽  
Rfid Tags ◽  
Frequency Range ◽  
Rfid Tag ◽  
Chipless Rfid ◽  
Frequency Identification ◽  
Coding Capacity ◽  
Microstrip Structure

A compact chipless radio frequency identification (RFID) tag-based on slow-wave technology is introduced in this paper. The tag consists of a resonant circuit based on open stub resonators periodically loaded by shunt stubs allowing a coding capacity of 9 bits and operating in a frequency range from 2 to 4GHz. The receiving and transmitting antennas of the tag are particularly designed to minimize the tag size as much as possible. The proposed tag presents a robust bit pattern with a compact and fully printable structure using FR4 substrate for a low-cost tag.

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