Chipless RFID Tag Based on Electrically Small Spiral Capacitively Loaded Dipole

Havlicek, Jaroslav; Švanda, Milan; Polívka, Milan; Macháč, Jan; Kracek, Jan

doi:10.1109/lawp.2017.2760059

Cited by 31 publications

(19 citation statements)

References 14 publications

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“…Recently reported state of the art RCS based chipless RFID tags are mostly based on dipole resonators, such as: capacitively loaded [25], crossed [26], tip loaded [27], and dual-spiral capacitively-loaded [24]. Dipoles are primarily utilized to enhance the spectral bit capacity [25] that ranges from 6.66 [26] to 12.5 [27] bits/GHz for the reported work. However, a trade-off exists between the compactness and spectral bit capacity of the tag.…”

Section: Introductionmentioning

confidence: 99%

“…However, a trade-off exists between the compactness and spectral bit capacity of the tag. Size of reported dipole based tags varies from 35 ×15 mm 2 [27] to 55 ×55 mm 2 [24] corresponding to a lower estimated bit density of 0.66 [24] to 1.77 [25] bits/cm 2 . Therefore dipole based resonators are unsuitable for chipless RFID tag designs targeted at enhancing bit density.…”

Section: Introductionmentioning

confidence: 99%

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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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

et al. 2019

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“…In fact, although several conductive fabrics are available on the market [1,2,3] and different low-cost fabrication techniques have been proposed in literature [3,4,5,6,7,8,9,10,11,12,13,14,15], the wearability of smart clothes and their robustness in operations such as washing, drying and ironing are still strongly limited by the use of chips and ICs requiring tin soldering [5,6]. This problem is overcome by chipless devices, such as chipless Radio Frequency Identification (RFID) tags [16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34].…”

Section: Introductionmentioning

confidence: 99%

A Frequency Signature RFID Chipless Tag for Wearable Applications

Corchia

Monti

Tarricone

2019

Sensors

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In this paper, a frequency-signature Radio-Frequency Identification (RFID) chipless tag for wearable applications is presented. The results achieved for a fully-textile solution guaranteeing a seamless integration in clothes are reported and discussed. The proposed tag consists of two planar monopole antennas and a 50 Ω microstrip line loaded with multiple resonators. In order to achieve a compact size, the resonators are slotted on the ground plane of the microstrip line. As for the antennas, the same geometry was exploited for both the TX and the RX tag antenna. In particular, it consists of a proximity fed planar monopole on a ground plane. The selected geometry guarantees easy integration with the multi-resonator structure. Numerical and experimental data referring to a 2-bit implementation are presented and discussed. For fabricating all the prototypes, a layer of pile was used as a substrate, while an adhesive non-woven conductive fabric was exploited for the fabrication of the conductive parts. Experimental tests demonstrate that although the performance of the final device strongly depends on the properties of the used materials and on the imperfections of the fabrication process, the proposed frequency-signature RFID chipless tag is suitable for wearable applications, such as anti-counterfeiting systems and laundry labels.

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“…It is observed that reported resonators are incapable of achieving high bit density owing to their large size and reduced data bits for encoding. The dipole resonator-based capacitive loaded chipless RFID tag structure is reported in [15]. Moreover, square loop and cross-loop shaped resonating structures for chipless tag are discussed [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, square loop and cross-loop shaped resonating structures for chipless tag are discussed [16][17][18][19]. The reported structures are primarily designed to enhance bit density of the tag but due to their large size of 17 mm × 68 mm [15], 40 mm × 40 mm [16,17], and low bit capacity of 5-bits [18,19], estimated overall bit density is still low. Therefore, they are not considered suitable for data-dense applications.…”

Section: Introductionmentioning

confidence: 99%

Data-Dense and Miniature Chipless Moisture Sensor RFID Tag for Internet of Things

et al. 2019

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A novel and miniaturized semi-elliptical 20-bit fully passive chipless RFID sensor tag is proposed in this article. The realized sensor tag is made up of semi-elliptical shaped open-end slots within the compact size of 25 mm × 17 mm. The multi-substrate analysis of the proposed tag is examined using non-flexible and flexible materials. The articulated tag configuration is capable of monitoring moisture levels when the largest resonator is covered by a heat-resistant sheet of Kapton HN (DuPontTM). The proposed tag functions in the operational frequency band of 4.1 GHz-16 GHz and possesses the overall bit density of 4.70 bit/cm 2 . The structure is composed of a thin passive substrate layer topped with an active layer of conductive path and is considered as a potential candidate for low-cost identification of the tagged objects. In addition to that, its moisture sensing property and flexible nature make it a reliable smart sensor for conformal applications.

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Chipless RFID Tag Based on Electrically Small Spiral Capacitively Loaded Dipole

Cited by 31 publications

References 14 publications

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

Orientation Independent Chipless RFID Tag Using Novel Trefoil Resonators

A Frequency Signature RFID Chipless Tag for Wearable Applications

Data-Dense and Miniature Chipless Moisture Sensor RFID Tag for Internet of Things

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