A compact implantable RFID tag antenna dedicated to wireless health care

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

Section: Introductionmentioning

confidence: 99%

A miniaturized circularly polarized implantable RFID antenna for biomedical applications

Zhang

Liu

et al. 2019

“…Use of additional lumped elements to attain impedance matching make the design bulky hence impedance matching techniques should be integrated along with the tag antennas. Some of the integrated impedance matching techniques utilize T matching loop embedded dipole structures, patch antenna with tuning slots and comb structure, short circuited capacitively coupled feed, dual radiating symmetrical patches with matching circuits using grounded vias and shorted edges etc.…”

Section: Introductionmentioning

confidence: 99%

Compact meandered RFID tag antenna with high read range for UHF band applications

Bansal

Sharma

Khanna

2019

In this work, a compact, long read range, and an efficient spiral loop structure coupled tag antenna is proposed for UHF-RFID applications. Meandered line element is inductively coupled to spiral loop for matching its input impedance to Higgs-4 chip. Equivalent circuit of antenna is extracted to analyze its working mechanism in the operating band. Experimental characterization validates the performance of proposed tag antenna in free space and on cardboard sheet in terms of read range, tag sensitivity, and differential radar cross section with an EIRP of 3.28 W. The measured radiation pattern of the tag is found to be omnidirectional in H plane and figure of eight in E plane. The tag's read range is measured on objects like fiber, wood, plastic, and glass in outdoor scenario to study its environment tolerance. The tag antenna has volumetric size of 1736 mm 3 and read range of 13.6 m in US RFID band. K E Y W O R D S inductive loop feed, radar cross section (ΔRCS), read range, tag sensitivity, UHF (ultrahigh frequency) radio frequency identification (RFID) tag antenna

“…Among the techniques of the third form of control access, we mention the identification systems that have been rapidly developed in recent years, mainly those of radio frequency identification (RFID) which are considered as an advanced technology for automatic identification applications and which are increasingly used in various fields . Current uses of the RFID technology include as examples points of sale, automatic vehicle identification systems, animal identification, asset tracking, logistics management, e‐passports, products, and raw materials tracking . Building access control presents a potential for RFID applications.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, authentication systems based on RFID cards for access control widely utilize biometrics . Several authentication frameworks have been developed . Indeed, integrating the RFID technology and the biometrics for physical access control widely used to provide strong authentication through a tag that unambiguously identifies the holder.…”

Section: Introductionmentioning

confidence: 99%

Double watermarking‐based biometric access control for radio frequency identification card

Haddada

Amara

2019

The integration of data privacy and security into radio frequency identification (RFID) technology, particularly into RFID tags, has become one of the most attractive research areas. A crucial challenge in RFID technology research lies in providing an efficient protection for systems against information theft and illegitimate access. This article proposes a secure solution based on an RFID card for physical biometric access-control applications. This is done by integrating two biometric modalities, namely face and fingerprint which are secured via a double watermarking technique. The suggested approach is ensured by two levels of watermarking. At the first level, the wavelet packet decomposition watermarking algorithm is used to insert features from the fingerprint (minutiae) in the face image of an authorized person. At the second level, the same watermarking algorithm is employed to insert the fingerprint watermark in the face features extracted by Gabor filters from the previously watermarked face image (at the first level). The obtained secured watermarked biometric data are then integrated in a 1-kB high frequency proximity RFID card. This combination of both RFID technology and the double watermarking technique provides a biometric control access framework.Compared with the state-of-the-art frameworks, the proposed one ensures a good compromise between a reduced computational complexity and a high level of data security while maintaining a small space of storage and a low cost compared to those of the marketed products. K E Y W O R D Sauthentication framework, biometrics, control access, double watermarking, radio frequency identification, security