Novel Butterfly Slot Based Chipless RFID Tag

Riaz, Muhammad Ali; Yassin, Abdullah; Shahid, Humayun; Amin, Yasar; Akram, Adeel; Tenhunen, Hannu

doi:10.13164/re.2018.0776

Cited by 18 publications

(12 citation statements)

References 21 publications

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“…Four corners of the geometric structure, on the other hand, are home to maximal distribution of surface current, signifying presence of capacitive effects. The concurrent existence of inductive and capacitive characteristics distributed across a single geometric structure results in generation of a pronounced spectral dip [22]. The spectral dip is readily observable in the RCS response of the resonant element as has been shown in Fig.…”

Section: Chipless Rfid Sensor Designing a Operating Principlementioning

confidence: 84%

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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Section: Chipless Rfid Sensor Designing a Operating Principlementioning

confidence: 84%

Chipless RFID Tag for Touch Event Sensing and Localization

Shahid

Riaz

et al. 2020

IEEE Access

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“…A table that shows the comparison among the encoding capability of the proposed structure with some of the existing structures is displayed in Table 2. Other tag structure parameters are taken from the research in papers [12], [19,20]. The results in Fig.…”

Section: Resultsmentioning

confidence: 99%

Data Encoding Improvement and Size Reduction of Chipless RFID Tag Using Short-circuit Line Effect and Angle-based Divided Loops

Nguyen¹,

Tran²

2020

JST

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This paper focuses on a short circuit and concentric loop effects to improve the structure dimension as well as enhance the ability to encode electromagnetic wave data for chipless RFID tags. The tag is composed of star-shaped rings that are concentrically nested together. The following factors help reduce the tag size: using the phenomenon of electromagnetic backscattering, assessment by the Radar Cross Section (RCS), the antenna-free tag only includes the multi-frequency resonators. By inserting short circuit lines combined with concentric loops, the number of resonant peaks increases exponentially without increasing the tag overall dimension. In addition, by inserting the short circuit lines at different angles between the two consecutive loops, we can adjust the resonant frequency in the frequency bands, thereby changing the value of the bit by shifting the frequency position. The overall dimension of the resulted tag is 13mmx13 mm and the tag is aimed to be a printable tag on the flexible substrate to minimize the fabrication cost. With the 18-vertex star-shaped tag with five concentric loops, this chipless RFID tag can encode up to 16 bits with high resolution and large data density.

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“…The RCS contains encoded information about the tag in question. Several CRFID tags based on these frequency domain (FD) techniques have been proposed [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ] to cope with challenges such as: code density, spectral efficiency, conformability, and cost.…”

Section: Introductionmentioning

confidence: 99%

“…This tag has a code density of 5.44 bits/cm 2 and spectral efficiency of 2 bits/GHz. Similarly, a butterfly [ 25 ] and kite-shaped [ 26 ] tags with high bit densities of 5.1 and 5.44 bits/cm 2 respectively were presented. Both tags operate in 4.7–10 GHz and attain a low-spectral efficiency of 2 bits/GHz.…”

Section: Introductionmentioning

confidence: 99%

A 32-Bit Single Quadrant Angle-Controlled Chipless Tag for Radio Frequency Identification Applications

Noman

Haider

Ullah

et al. 2022

Sensors

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A 32-bit chipless RFID tag operating in the 4.5–10.9 GHz band is presented in this paper. The tag has a unique multiple-arc-type shape consisting of closely packed 0.2 mm wide arcs of different radii and lengths. The specific tag geometry provides multiple resonances in frequency domain of an RCS plot. A frequency domain coding technique has also been proposed to encode the tag’s RCS signature into a 32-bit digital identification code. The tag has an overall dimension of 17.9 × 17.9 mm2, resulting in a high code density of 9.98 bits/cm2 and spectral efficiency of 5 bits/GHz. The proposed tag is built on a low loss substrate bearing a very small footprint, thereby making it extremely suitable for large-scale product identification purposes in future chipless RFID tag systems.

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Novel Butterfly Slot Based Chipless RFID Tag

Cited by 18 publications

References 21 publications

Chipless RFID Tag for Touch Event Sensing and Localization

Chipless RFID Tag for Touch Event Sensing and Localization

Data Encoding Improvement and Size Reduction of Chipless RFID Tag Using Short-circuit Line Effect and Angle-based Divided Loops

A 32-Bit Single Quadrant Angle-Controlled Chipless Tag for Radio Frequency Identification Applications

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