NFC-Enabled Far-Field Antenna on PET Flexible Substrate for 3G/4G/LTE Mobile Devices

Abstract

This research presents a far-field (FF) antenna with near-field communication (NFC) capability for 3G/4G/LTE mobile devices. The integrated far-and near-field communication (FNFC) antenna was fabricated using conductive silver ink on polyethylene terephthalate (PET) flexible substrate. The FF segment of the antenna is operable in the frequency range of 1.8-2.1 GHz, and the NFC antenna is of dual loop and operable at 13.56 MHz. In the antenna realization, simulations were performed and, to validate, an antenna prototype was fabricated. The experimental results revealed that the FF antenna achieved an impedance bandwidth of 37% (1.52-2.21 GHz), given |S 11 | of less than −6 dB, with the minimum and maximum efficiency of 92.1% and 98%. The experimental gains are 1.76-2.08 dBi across the target operating frequency band, with near-omnidirectional radiation pattern. The simulation and experimental results are in good agreement. Moreover, the FNFC antenna achieves strong magnetic field distributions in H x , H y , and H z orientations and holds promising potential for 3G/4G/LTE applications.INDEX TERMS Conductive ink antenna, flexible substrate antenna, integrated antenna, mobile antenna.

Printable and flexible integrated sensing systems for wireless healthcare

“…For instance, in order to simultaneously fulfilling the requirements for near and far field communication, Luadang et al utilized a planar inverted F antenna (PIFA) structure to integrate a far-field (FF) antenna with an NFC antenna. 180 This configuration enables efficient wireless communication in both short-range at 13.56 MHz and long-range communication in the frequency range of 1.8-2.1 GHz. In another work, Rahman et al presented a wearable ultra-wideband (UWB) antenna designed primarily for brain stroke detection.…”

Near-Field HF-RFID and CMA-Based Circularly Polarized Far-Field UHF-RFID Integrated Tag Antenna

“…To assess the communication performance, the magnetic field intensity of the HF-RFID tag antenna is simulated by CST Studio Suite full-wave simulation software [31]. e reading range of the HF-RFID communication system primarily depends on the magnetic field [32]. However, the estimation of reading range cannot be exactly determined because the certain sensitivity of the HF-RFID tag is not available.…”

Design and Bending Analysis of Wearable Compact Patch Antenna for Medical Telemetry Based on Flexible Material

“…However, some of these designs have either relatively larger size while others are flexible but not wearable. Some other promising flexible materials such as polyethylene terephthalate (PET) (11)(12)(13)(14)(15)(16)(17)(18) and Rogers's RT/Duroid 5800 (19)(20)(21)(22) have been investigated. The compact design in (23) and (24) are greatly appreciated as the miniaturized antenna significantly reduces the size of electronic system but introduction of lossy elements to acquire reconfigurability makes it bulky and more prone to wear and tear.…”