Improving the Efficiency of NFC Systems Through Optimizing the Sintered Ferrite Sheet Thickness Selection

Victoria, Jorge; Suarez, Adrian; Martínez, P.A.; Alcarria, Antonio; Gerfer, Alexander; Torres, J.

doi:10.1109/temc.2020.3003800

Cited by 17 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NFC technology was developed for contactless communications in 2002 [33]. The NFC communication process occurs between two compatible devices less than 10 centimeters apart [34][35][36]. Compared to other communication technologies such as bluetooth, which displays a setup time of about 6 s, NFC is around 60 times faster.…”

Section: Nfc-and Smartphone-based Diagnosticsmentioning

confidence: 99%

Smartphone-Enabled Personalized Diagnostics: Current Status and Future Prospects

Merazzo

Totoricaguena-Gorriño

Fernández-Martín

et al. 2021

Diagnostics

View full text Add to dashboard Cite

Smartphones are becoming increasingly versatile thanks to the wide variety of sensor and actuator systems packed in them. Mobile devices today go well beyond their original purpose as communication devices, and this enables important new applications, ranging from augmented reality to the Internet of Things. Personalized diagnostics is one of the areas where mobile devices can have the greatest impact. Hitherto, the camera and communication abilities of these devices have been barely exploited for point of care (POC) purposes. This short review covers the recent evolution of mobile devices in the area of POC diagnostics and puts forward some ideas that may facilitate the development of more advanced applications and devices in the area of personalized diagnostics. With this purpose, the potential exploitation of wireless power and actuation of sensors and biosensors using near field communication (NFC), the use of the screen as a light source for actuation and spectroscopic analysis, using the haptic module to enhance mass transport in micro volumes, and the use of magnetic sensors are discussed.

show abstract

Section: Nfc-and Smartphone-based Diagnosticsmentioning

confidence: 99%

Smartphone-Enabled Personalized Diagnostics: Current Status and Future Prospects

Merazzo

Totoricaguena-Gorriño

Fernández-Martín

et al. 2021

Diagnostics

View full text Add to dashboard Cite

show abstract

“…To increase the efficiency and range while minimizing the losses due to eddy currents, a soft magnetic ferrite sheet can be inserted between the metal case and the antenna. Figure 7(a) illustrates how the magnetic field generates in NFC communication due to nearby conductive surface/plate, and Figure 7(b) shows the magnetic field produced when NFC area is shielded by a ferrite sheet from a conductive surface [40]. One can see the shielding effects due to insertion of ferrite sheet [40].…”

Section: Eddy Currents Challenge: Role Of Ferrite Materials In Nfcmentioning

confidence: 99%

“…Figure 7(a) illustrates how the magnetic field generates in NFC communication due to nearby conductive surface/plate, and Figure 7(b) shows the magnetic field produced when NFC area is shielded by a ferrite sheet from a conductive surface [40]. One can see the shielding effects due to insertion of ferrite sheet [40]. To be amenable to NFC, the ferrite sheets should have high permeability and low magnetic loss to concentrate the magnetic flux generated between the transmit and receive coils (antennas) [39,41].…”

Section: Eddy Currents Challenge: Role Of Ferrite Materials In Nfcmentioning

confidence: 99%

See 1 more Smart Citation

Near-Field Communications (NFC) for Wireless Power Transfer (WPT): An Overview

Lathiya¹,

Wang²

2021

Wireless Power Transfer – Recent Development, Applications and New Perspectives

View full text Add to dashboard Cite

Recent advancements in the semiconductor integrated circuits and functional materials technologies have accelerated the demand of electronic and biomedical devices such as internet of things (IoT) and wearable sensors, which have low power consumption, miniature size and high data transfer efficiency. Wireless power transfer (WPT) has become the alternative solution to current electronic devices that rely on bulky batteries to supply the power and energy. Near Field Communication (NFC) technology is extensively used for wireless power transfer, where devices communicate through inductive coupling via induced magnetic fields between transmit and receive coils (loop antennas). Thin NFC sheets made of soft magnetic materials are inserted between antennas and metal case of wireless gadgets, such as mobile phones or tablets, to reduce the degradation of antenna gain and radiation efficiency due to generation of eddy currents. To enhance the efficiency of wireless power transfer, magnetic materials with superb properties such as high permeability, low magnetic loss and high resistivity are highly desirable. In this chapter, we will provide an overview of the current state of the art, recent progress and future directions in NFC based wireless power transfer, with the special focus on near field communications operating at 13.56 MHz.

show abstract

“…This evolution usually involves a higher component integration, printed circuit board (PCB) size and thickness reduction, and the miniaturization of the device housing [13,14]. These design principles are often used to achieve a device with better performance and features; however, they increase the likelihood of generating complex EMI problems [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Design and Study of a Wide-Band Printed Circuit Board Near-Field Probe

et al. 2021

Self Cite

View full text Add to dashboard Cite

Magnetic near-field probes (NFP) represent a suitable tool to measure the magnetic field level from a small electromagnetic interference (EMI) source. This kind of antenna is useful as a magnetic field probe for pre-compliance EMC measurements or debugging tasks since the user can scan a printed circuit board (PCB) looking for locations with strong magnetic fields. When a strong H-field point is found, the designer should check the PCB layout and components placement in that area to detect if this could result in an EMI source. This contribution focuses on analyzing the performance of an easy to build and low-cost H-field NFP designed and manufactured using a standard PCB stack-up. Thereby, the frequency range and sensitivity of the NFP-PCB are analyzed through a Finite Element Method (FEM) simulation model that makes it possible to evaluate its sensibility and effective frequency range. The numerical results obtained with the FEM models are validated against measurements to verify the design and performance of our NFP. The FEM model reproduces the experimental procedure, which is used to evaluate the performance of the NFP in terms of sensitivity by means of the simulated near-field distribution. The NFP-PCB has almost a flat response from 180 MHz to 6 GHz, with an almost perfect concordance between numerical and experimental S21 results. The numerical results show an average transmission loss of −27.9 dB by considering the flat response bandwidth, whereas the experimental one is −29.7 dB. Finally, the designed NFP is compared to two high-quality commercial probes in order to analyze its performance.

show abstract

Improving the Efficiency of NFC Systems Through Optimizing the Sintered Ferrite Sheet Thickness Selection

Cited by 17 publications

References 28 publications

Smartphone-Enabled Personalized Diagnostics: Current Status and Future Prospects

Smartphone-Enabled Personalized Diagnostics: Current Status and Future Prospects

Near-Field Communications (NFC) for Wireless Power Transfer (WPT): An Overview

Design and Study of a Wide-Band Printed Circuit Board Near-Field Probe

Contact Info

Product

Resources

About