A chipless RFID tag for smart temporal applications

Zahra, Anum; Shahid, Humayun; Riaz, Muhammad Ali; Amin, Yasar; Tenhunen, Hannu

doi:10.1002/mmce.21405

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…The realized tag samples are analyzed for their real-world performance using well-known far-field RCS measurement setup. The arrangement used in this work is the same as the one utilized in [39], [40], and is illustrated in Fig. 10 having a combination of similar transmitting and receiving horn antennas, vector network analyzer (VNA) R&S R , ZVL-13 and the tag prototype under test.…”

Section: Resultsmentioning

confidence: 99%

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

et al. 2019

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In this paper, a compact and fully passive bit encoding circuit, capable of operating as a chipless radio frequency identification (RFID) tag is presented. The structure consists of novel concentric trefoil-shaped slot resonators realized using Rogers RT/duroid R 5880 laminate, occupying a physical footprint of 13.55 × 13.55 mm 2. Each resonating element is associated with a particular data bit, having a 1:1 resonator-to-bit correspondence. Bit sequences are configured through introducing modifications in the geometric structure either by addition or exclusion of each nested slot resonator. Such changes manifest directly in the electromagnetic signature of the tag as presence or absence of corresponding resonant peaks. The proposed 10-bit tag offers minimized inter-resonator mutual coupling and insensitivity to changes in polarization and incident angles thereby demonstrating orientation independent functionality. Moreover, error-free encoding is achieved through stabilizing the shift in resonant frequencies for a variety of different geometric configurations and orientation of the structure. The tag operates within the license-free ultrawideband ranging from 5.4 to 10.4 GHz, providing spectral bit capacity and bit density of 2 bits/GHz and 5.44 bits/cm 2 respectively. INDEX TERMS Chipless tag, on-off keying (OOK), radar cross-section (RCS), radio frequency identification (RFID).

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Section: Resultsmentioning

confidence: 99%

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

et al. 2019

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“…RFID tags are also contributing towards the green world because of their wireless transmission, batteryless structure, lower operating power requirements, energy harvesting, smart sensors design, and usage of natural materials as substrates [4][5][6]. The low-cost fabrication of passive chipless RFID tags makes them a favorite choice for prominent applications such as inventory management in warehouses, cheap cargo, library material and vehicle tracking, access control, document security, healthcare industry, and smart IoT devices [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Flexible, Fully Printable, and Inexpensive Paper-Based Chipless Arabic Alphabet-Based RFID Tags

Yousaf

Almajali

Najjar

et al. 2022

Sensors

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This work presents the design and analysis of newly developed reconfigurable, flexible, inexpensive, optically-controlled, and fully printable chipless Arabic alphabet-based radio frequency identification (RFID) tags. The etching of the metallic copper tag strip is performed on a flexible simple thin paper substrate (ϵr = 2.31) backed by a metallic ground plane. The analysis of investigated tags is performed in CST MWS in the frequency range of 1–12 GHz for the determination of the unique signature resonance characteristics of each tag in terms of its back-scattered horizontal and vertical mono-static radar cross section (RCS). The analysis reflects that each tag has its own unique electromagnetic signature (EMS) due to the changing current distribution of metallic resonator. This EMS of each tag could be used for the robust detection and recognition of all realized 28 Arabic alphabet tags. The study also discusses, for the first time, the effect of the change in font type and size of realized tags on their EMS. The robustness and reliability of the obtained EMS of letter tags is confirmed by comparing the RCS results for selective letter tags using FDTD and MoM numerical methods, which shows very good agreement. The proposed tags could be used for smart internet of things (IoT) and product marketing applications.

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“…The imping waves are backscattered towards the reader unit along with the stored data. This makes such tags a preferred choice for applications falling under the scope of Internet of Things (IoT) paradigm [2]. Passive tags can either be chip-based or chipless.…”

Section: Introductionmentioning

confidence: 99%

Chipless RFID Tag for Touch Event Sensing and Localization

Shahid

Riaz

et al. 2020

IEEE Access

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A novel Radio Frequency Identification (RFID) based sensor supporting touch detection and localization features is proposed in this work. The formulated sensor leverages chipless variant of RFID technology for the design of a passive fully-printable frequency domain-based sensor-incorporated tag. The sensor is composed of square resonators arranged in a peculiar fashion laid down across a 3 × 2 grid. The proposed sensor incorporated-tag readily keeps track of human-digit position, allowing for tracking of finger-swipes which, in turn, can potentially be used for recognition of unlock patterns and security codes. Performance of the sensor is analyzed using its Radar Cross Section (RCS) response observable in the spectral domain. Each constituent resonant-element making up the sensor resonates at a single frequency represented by a distinct dip in the RCS response. The spectral dip drifts well outside of its allocated band upon occurrence of a touch event. A functional prototype of the sensor tag is fabricated on a 0.508 mm thick Rogers RT/Duroid R 5880 laminate is scrutinized of its electromagnetic performance. The sensor possesses a compact physical footprint equal to 45 mm × 55 mm. The obtained results solidify the suitability of the proposed sensor for deployment in secure access control settings prevalent in smart cities and connected home applications. INDEX TERMS Chipless tag, radio frequency identification (RFID), RFID sensor, radar cross-section (RCS), touch sensor.

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A chipless RFID tag for smart temporal applications

Cited by 6 publications

References 19 publications

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

Flexible, Fully Printable, and Inexpensive Paper-Based Chipless Arabic Alphabet-Based RFID Tags

Chipless RFID Tag for Touch Event Sensing and Localization

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