Wearable near-field communication antennas with magnetic composite films

The flexible near-field communication (NFC) antennas integrated with Fe3O4/ethylene-vinyl acetate copolymer (EVA) magnetic films were presented, and the influence of the magnetic composite films on the performance and miniaturization capability of the NFC antennas was investigated. Theoretical analysis and experimental results show that the integration of the magnetic composite films is conducive to the miniaturization of the NFC antennas. However, the pattern design of the integrated magnetic film is very important to improve the communication performance of NFC antenna. When magnetic film covers whole antenna, the inductance (L) and quality factor (Q) of the NFC antenna at 13MHz are increased by 60% and 5% respectively, but the communication distance of NFC system is decreased by 70%. When the magnetic film is located at the center of the antenna, the L value, Q value and communication distance of the NFC antenna are increased by 16.5%, 15.5% and 20% respectively. It can be seen that the application of ...

[1]  Leena Ukkonen,et al.  Characterization of Two-Turns External Loop Antenna With Magnetic Core for Efficient Wireless Powering of Cortical Implants , 2016, IEEE Antennas and Wireless Propagation Letters.

[2]  Feng Liu,et al.  NiCuZn ferrite thin films for RF integrated inductors , 2006 .

[3]  Jung Woo Lee,et al.  Epidermal electronics with advanced capabilities in near-field communication. , 2015, Small.

[4]  Robin Wright,et al.  Wearable Technology: If the Tech Fits, Wear It , 2014 .

[5]  T. Ren,et al.  Epitaxial yttrium iron garnet film for fabrication of high frequency on-chip inductors , 2016 .

[6]  D. Staiculescu,et al.  Effect of Permittivity and Permeability of a Flexible Magnetic Composite Material on the Performance and Miniaturization Capability of Planar Antennas for RFID and Wearable Wireless Applications , 2009, IEEE Transactions on Components and Packaging Technologies.

[7]  B. Lucas,et al.  Inverted Polymer Solar Cells with a Reduced Graphene Oxide/Poly (3,4-Ethylene Dioxythiophene):Poly(4-Styrene Sulfonate) (PEDOT:PSS) Hole Transport Layer , 2018, Journal of Electronic Materials.

[8]  C. Parini,et al.  Antennas and propagation for on-body communication systems , 2007, IEEE Antennas and Propagation Magazine.

[9]  Hendrik Rogier,et al.  Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz. , 2015, IEEE Antennas and Propagation Magazine.

[10]  Sylvain Collardey,et al.  Design methodology for wearable antenna on artificial magnetic conductor using stretch conductive fabric , 2016 .