Fully Textile Dual-Band Logo Antenna for IoT Wearable Devices

Atanasova, Gabriela; Atanasov, Blagovest; Atanasov, Nikolay

doi:10.3390/s22124516

Cited by 19 publications

(9 citation statements)

References 55 publications

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“…The accuracy of designs prepared for the textronic devices with the RFID interface depends in particular on the knowledge of the dielectric properties of the substrates/textiles [ 4 , 5 ]. These parameters, although important, are not of key importance in the case of multichannel/broadband textile antennas dedicated to classic radio communication systems with an impedance of 50 Ω [ 6 , 7 ]. The problem is much more important in the case of RFID systems of the UHF band (operating frequency f 0 = 860–960 MHz) [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

et al. 2022

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Recent advances in the development of innovative textronic products are often related to the implementation of radio-frequency identification (RFID) technology. Such devices contain components of wireless telecommunications systems, in which radiofrequency circuits should be designed taking into account not only the frequency band or destined application, but also the dielectric properties of the materials. As is known from the theory of RFID systems, the dielectric permittivity and loss angle of the substrates significantly affect the performance of RFID transponders. Therefore, the knowledge on the variability of these parameters is highly important in the context of developing new solutions in textronic devices with the RFID interface. According to the plan of studies, at the beginning, the comprehensive characterization and determination of the dielectric parameters of various types of textile substrates were carried out. On this basis, the influence of fabrics on the performance of textronic RFID (RFIDtex) tags was characterized with numerical calculations. As the RFIDtex transponders proposed by the authors in the patent PL231291 have an outstanding design in which the antenna and the chip are located on physically separated substrates and are galvanically isolated, the special means had to be implemented when creating a numerical model. On the other hand, the great advantage of the developed construction was confirmed. Since the impedance at the chip’s terminals is primarily determined by the coupling system, the selected fabrics have relatively low impact on the efficiency of the RFIDtex transponder. Such an effect is impossible to achieve with classical designs of passive or semi-passive transponders. The correctness of the simulations was verified on the exemplary demonstrators, in threshold and rotation measurements performed at the laboratory stand.

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Section: Introductionmentioning

confidence: 99%

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

et al. 2022

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“…Several types of flexible textile-based antennas for body-worn devices, such as monopole [ 13 , 14 ], monopole integrated with a reflector [ 2 ], squire slot [ 15 ], loop [ 16 ], patch [ 17 , 18 ], logo [ 19 ], and MIMO [ 20 ] antennas, have been presented. Furthermore, antennas with polymer-based substrates such as dipoles [ 21 ], dipoles integrated with a reflector [ 5 , 10 , 22 ], monopoles combined with a metasurface [ 23 ], and monopoles and CPW-PIFA fabricated on Rogers flexible substrates [ 15 , 24 , 25 ] have been proposed for body-worn applications.…”

Section: Introductionmentioning

confidence: 99%

“…Most flexible wearable antennas reported in the literature have a high degree of isolation between the antenna and human body tissue [ 2 , 5 , 8 , 10 , 15 , 16 , 19 , 23 , 25 ] and directional radiation patterns, which make these designs unsuitable for communications between an antenna placed on the body and another one inside the body. Only a few previous studies [ 6 , 20 , 21 , 22 , 24 , 26 ] presented the design of body-worn antennas for in-/on- and off-body communications.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Miniature Antenna for Body-Worn Devices: Design and Transmission Performance

et al. 2023

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The last few years have seen a rapid increase in body-worn devices because these devices cover a broad spectrum of potential uses. Moreover, body-worn devices still require improvements in their flexibility, size, and weight that necessitate the development of flexible and miniature antennas. In this paper, we present a new flexible miniature antenna for body-worn devices. To ensure flexibility and comfort when the antenna is in contact with the human body, a substrate from natural rubber filled with TiO2 is developed. The miniaturization is achieved using the quadratic Koch curve. The antenna design, optimization, and characterization are performed on a human body model. The performance of the antenna is analyzed in two scenarios: (1) in- to on-body, and (2) on- to off-body wireless communications. The results show that the antenna realized the maximum telemetry range of more than 80 mm for in-body communications and more than 2 m for off-body communications. Moreover, the highest 10 g specific absorption rate value was 0.62 W/kg. These results, in addition to the antenna’s compact dimensions (12 mm × 26 mm × 2.5 mm) and the low manufacturing price, make the proposed antenna an ideal candidate for health telemetry applications.

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“…The performance comparison of different compact antennas (conventional, EBG-based, and SRR-based) along with specific absorption rate (SAR) analysis suggests that they are well-suited for biomedical sensors, to work at 2.4 GHz and 5.8 GHz dual band frequencies [ 24 ]. A fully textile dual band logo antenna integrated with a reflector for application in IoT wearable devices achieves improvement in radiation, robustness, and efficiency both in free space and on humans, notebook, paper, and laptop phantom at dual band frequencies [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

A Metamaterial Inspired AMC Backed Dual Band Antenna for ISM and RFID Applications

Najumunnisa

Sastry

Madhav

et al. 2022

Sensors

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This work presents the design and fabrication of a metamaterial-based stimulated dual band antenna on FR4 material (dielectric constant 4.3) to operate in Industrial, Scientific and Medical (ISM) and Radio-frequency Identification (RFID) applications. The antenna model had an overall dimension of 70 × 31 × 1.6 mm3 with etched T-slots and L-slots for dual band resonance. The main objective of this work was to enhance the gain performance characteristic at the selected dual band frequencies of 0.915 GHz and 2.45 GHz. Initially, it achieved a narrow bandwidth of 0.018 GHz with a gain of 1.53 dBi at a lower frequency, and 0.13 GHz of bandwidth featuring 4.49 dBi of gain at a higher frequency. The antenna provided an impedance bandwidth of 2% (0.905–0.923 GHz) and 5% (2.382–2.516 GHz) at two resonating frequencies. The antenna was integrated with a designed novel AMC structure to enhance the gain in CST Microwave Studio software with the finite integration method. The characteristic features of the AMC unit cell were observed at 0.915 GHz and 2.45 GHz frequencies and after antenna integration, the final prototype achieved a gain of 2.87 dBi at 0.915 GHz and 6.8 dBi at 2.45 GHz frequencies.

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Fully Textile Dual-Band Logo Antenna for IoT Wearable Devices

Cited by 19 publications

References 55 publications

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

A Flexible Miniature Antenna for Body-Worn Devices: Design and Transmission Performance

A Metamaterial Inspired AMC Backed Dual Band Antenna for ISM and RFID Applications

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