RFID Antennas for Body-Area Applications: From Wearables to Implants

Kiourti, Asimina

doi:10.1109/map.2018.2859167

Cited by 69 publications

(32 citation statements)

References 76 publications

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“…Radio frequency electronics that use a passive electromagnetic device and an active electronic transistor to trigger, receive, and process information are the go-to option at the moment (Singh R. et al, 2017;Andersson Ersman et al, 2019). They employ radio frequency backscattering techniques to extract information associated with remote objects (Kiourti, 2018). The antennas act as either a transmitter or receiver to link electromagnetic waves traveling through space to electrical currents in the conductive component (Bansal, 1984), therefore, their bandwidth enhancement and size reduction are two major considerations in the design phase (Faisal, 2019).…”

Section: Communicationmentioning

confidence: 99%

Flexible Electronics: Status, Challenges and Opportunities

2020

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The concept of flexible electronics has been around for several decades. In principle, anything thin or very long can become flexible. While cables and wiring are the prime example for flexibility, it was not until the space race that silicon wafers used for solar cells in satellites were thinned to increase their power per weight ratio, thus allowing a certain degree of warping. This concept permitted the first flexible solar cells in the 1960s (Crabb and Treble, 1967). The development of conductive polymers (Shirakawa et al., 1977), organic semiconductors, and amorphous silicon (Chittick et al., 1969; Okaniwa et al., 1983) in the following decades meant huge strides toward flexibility and processability, and thus these materials became the base for electronic devices in applications that require bending, rolling, folding, and stretching, among other properties that cannot be fulfilled by conventional electronics (Cheng and Wagner, 2009) (Figure 1). Presently there is great interest in new materials and fabrication techniques which allow for highperformance scalable electronic devices to be manufactured directly onto flexible substrates. This interest has also extended to not only flexibility but also properties like stretchability and healability which can be achieved by utilizing elastomeric substrates with strong molecular interactions (Oh et al., 2016; Kang et al., 2018). Likewise, biocompatibility and biodegradability has been achieved through polymers that do not cause adverse effect to the body and can be broken down into smaller constituent pieces after utilization (Bettinger and Bao, 2010; Irimia-Vladu et al., 2010; Liu H. et al., 2019). This new progress is now enabling devices which can conform to complex and dynamic surfaces, such as those found in biological systems and bioinspired soft robotics. These next-generation flexible electronics open up a wide range of exciting new applications such as flexible lighting and display technologies for consumer electronics, architecture, and textiles, wearables with sensors that help monitor our health and habits, implantable electronics for improved medical imaging and diagnostics, as well as extending the functionality of robots and unmanned aircraft through lightweight and conformable energy harvesting devices and sensors. While conventional electronics are very capable of these functions, flexible electronics are intended to expand the mechanical features to adhere to novel form factors through hybrid strategies, or as standalone solutions where the application does not require high computation power, intended to be highly robust to deformation, low cost, thin, or disposable. The definition of flexibility differs from application to application. From bending and rolling for easier handling of large area photovoltaics, to conforming onto irregular shapes, folding, twisting, stretching, and deforming required for devices in electronic skin, all while maintaining device performance and reliability. While early progress and many important innovations have alre...

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Section: Communicationmentioning

confidence: 99%

Flexible Electronics: Status, Challenges and Opportunities

2020

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“…[3] presents the different challenges and issues in designing wearable antennas, their material selection, and fabrication techniques. [4] provides a holistic and critical review of design challenges associated with body-area RFID technologies, including operation frequencies, influence of the surrounding biological tissues, antenna design and miniaturization, and conformance to international safety guidelines. In [5], a flexible thin antenna solution for wearable ankle strap applications with Global Navigation Satellite System (GNSS) and Bluetooth Low Energy (BLE) connectivity is proposed.…”

Section: Introductionmentioning

confidence: 99%

Design of an Ultra-Wideband Uhf Rfid Reader Antenna for Wearable Ankle Tracking Applications

Jebbawi¹,

Egels²,

Pannier³

2020

PIER C

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In this paper, a broadband reader antenna is designed and manufactured for wearable ankle strap applications. The frequency range covered for S 11 < −10 dB is from 850 MHz to 1650 MHz with dipole like radiation pattern in free space. The proposed broadband antenna is manufactured with a semi-flex (Taconic RF-35) and flexible (Kapton) substrates. A good agreement between simulations and measurements has been achieved. Prototypes performances have been tested by measuring the reading distance. The maximum reading distance obtained is about 1.46 m at 865 MHz with an output power of the transmitter (P T X) of 25 dBm. Results of functional RFID test show that the proposed antenna can be used as an RFID reader antenna when it is placed on the ankle of the human body.

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“…Passive RFID antenna is generally applied in patient identification, and it can capture the power from the carrier transmitted by reader. Integrating RFID antenna into wireless medical communication devices has become the mainstream of the research . A compact folded dipole antenna of a size of 10 × 12 × 2 mm 3 operating at 2.4‐GHz ISM band is proposed in Reference .…”

Section: Introductionmentioning

confidence: 99%

“…For complex in‐body environment, several ways to realize miniaturization have been proposed, such as adopting high‐permittivity substrate, loading slots to extend effective currents, and building multilayer structure . Our previous work in Reference presented a wideband circularly polarized antenna without adapting RFID technology, so no battery operation would be a concern . Liu et al proposed a CP antenna by capacitive loading for miniaturization.…”

Section: Introductionmentioning

confidence: 99%

A miniaturized circularly polarized implantable RFID antenna for biomedical applications

Zhang

Liu

et al. 2019

Int J RF Microw Comput Aided Eng

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A miniaturized circularly polarized implantable antenna operating at ultrahigh frequency band (902-928 MHz) for radio frequency identification biomedical monitoring is first presented and experimentally validated in this article. The proposed antenna features a compact volume with a dimension of π × (6) 2 × 1.27 mm 3 by employing an extended ring with meandered lines for size reduction. Moreover, adjusting the length of symmetrical meandered lines can introduce two orthogonal modes, which makes for good performance of circular polarization. Superb impedance matching between the chip and tag antenna is well implemented by applying a modified T-match stub. In the simulation, the antenna achieves a −10-dB impedance bandwidth of 42 MHz (902-944 MHz) and 3-dB axial-ratio bandwidth is 53 MHz (892-945 MHz). Finally, the specific absorption rate is also calculated for human safety and the measured reading range reaches the maximum distance of about 87 cm. K E Y W O R D Scircular polarization, implantable antenna, miniaturized tag antenna, radio frequency identification

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RFID Antennas for Body-Area Applications: From Wearables to Implants

Cited by 69 publications

References 76 publications

Flexible Electronics: Status, Challenges and Opportunities

Flexible Electronics: Status, Challenges and Opportunities

Design of an Ultra-Wideband Uhf Rfid Reader Antenna for Wearable Ankle Tracking Applications

A miniaturized circularly polarized implantable RFID antenna for biomedical applications

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