Increased operational range for implantable UHF RFID antennas

Dubok, A.; Smolders, A.B.

doi:10.1109/eucap.2014.6902131

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…This is due to the manufacturing process which can introduce small variations on the insulation layer thickness as shown Figure 8. The measurements were done by connecting a small cable to the antenna [11,32], which was then immersed in a body phantom realized by combining diethylene glycol butyl ether (44%) and de-ionized water (56%) [16,33], in order to obtain the same permittivity as the homogeneous theoretical model used for the simulation. The solution is contained in a 60 ml polypropylene cylindrical flask having dimensions and shape close to those of the animal body.…”

Section: Resultsmentioning

confidence: 99%

“…However, except the antenna bandwidth, neither its efficiency nor its gain is given. In [11], a cylindrical antenna presenting dimensions of 55.2 × π × 25 mm 3 and designated to be implanted in human living tissues is proposed. Despite its good performance, its global dimensions do not allow its implantation in small animals such as mice.…”

Section: Introductionmentioning

confidence: 99%

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A Miniature Implanted Antenna for Uhf Rfid Applications

Nguyễn¹,

Diallo²,

Thuc³

et al. 2020

PIER C

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In this paper, the design of a miniature antenna dedicated to be implanted in a small animal and intended to work in the European UHF RFID (865-868 MHz) band is presented. One of the goals of this work is the miniaturization of the radiating element while preserving its efficiency to allow a reliable communication between an external interrogating reader and the implanted device. The radiating element is a small rectangular loop antenna associated with a dipole allowing impedance matching. The antenna has dimensions of 2.4 mm × 25.4 mm × 0.5 mm and integrates an Impinj Monza 4 chip presenting an impedance of 5.5 − j74 Ohms at 868 MHz. The antenna is designed and optimized by using the ANSYS HFSS software. The obtained results show a simulated radiation efficiency of 0.7% and simulated total gain of −17.5 dBi. A prototype is realized, and RSSI measurements have demonstrated the possibility of reliable wireless communications between the implanted antenna and an external reader. In addition, Specific Absorption Rate (SAR) calculation indicates that this implanted antenna meets the required safety regulations.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Miniature Implanted Antenna for Uhf Rfid Applications

Nguyễn¹,

Diallo²,

Thuc³

et al. 2020

PIER C

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“…In Reference , a compact, battery‐less system for an implantable semiactive UHF RFID tag with inductive wireless power transfer is designed. A novel cylindrical implantable antenna in Reference is presented for increasing operational range, which is able to work in a range up to 3 m for the implanted depth of 2.5 cm. Usually, reader antennas have the characteristics of circular polarization to compensate for loss caused by misaligned linearly polarized antennas, while the tag antennas mentioned above are all with linear polarization, which means that only half of the power transmitted by the reader can be received by the tag.…”

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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“…However, the short read range and low data rates associated with these bands make them unsuitable for real‐time subject monitoring applications. Recent research work on the implantable antenna design shows an inclination toward using ultra‐high‐frequency and industrial‐scientific‐medical (ISM) as the operational bands to achieve longer activation distances and high data rates …”

Section: Introductionmentioning

confidence: 99%

“…Recent research work on the implantable antenna design shows an inclination toward using ultra-high-frequency and industrial-scientificmedical (ISM) as the operational bands to achieve longer activation distances and high data rates. [12][13][14][15][16][17][18][19][20][21][22][23] Impedance mismatch and radiation efficiency degradation are the two main concerns of the in-body tag antennas. Designing the antenna directly inside a phantom mimicking the electromagnetic behavior of the targeted body part for the implant helps in tackling the impedance mismatch issue.…”

Section: Introductionmentioning

confidence: 99%

A compact implantable RFID tag antenna dedicated to wireless health care

Aslam

Khan

Azam

et al. 2017

Int J. RF Microw. Comput. Aided Eng.

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Implantable tag antennas are an integral component of contemporary pervasive patient monitoring setups envisioned to reduce the medical errors and improve the quality of health care facilities. These tags, embedded into the human body, transmit critical patient information to the external equipment via a wireless communication link. This research article presents an implantable compact folded dipole antenna of size 10 mm × 15 mm × 2 mm, designed to operate in the industrial‐scientific‐medical band (2.4‐2.48GHz). A three‐layered phantom representing the human arm is used to evaluate the subcutaneous antenna performance. The tag antenna embedded in the middle of the fat layer offers a maximum gain of −16.3 dBi. The tag antenna performance as a function of implant position and phantom dimensions is analyzed. Link budget calculations show that with the achieved antenna gain the link power exceeds the required power by 38.37 dBm, and hence wireless communication is viable.

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Increased operational range for implantable UHF RFID antennas

Cited by 7 publications

References 8 publications

A Miniature Implanted Antenna for Uhf Rfid Applications

A Miniature Implanted Antenna for Uhf Rfid Applications

A miniaturized circularly polarized implantable RFID antenna for biomedical applications

A compact implantable RFID tag antenna dedicated to wireless health care

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