Effects on human body and conductive body over a near field communication antenna

Benavides, Marcia; Miralles, David; Andújar, Aurora; Anguera, Jaume

doi:10.1080/09205071.2021.1875889

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Other than antenna size, the flexibility of the tag antenna is also one of the major concerns in certain applications. Previously, most NFC tag antennas were fabricated on rigid substrates, such as FR-4 and PCB board, as proposed in [11][12][13]. However, these rigid substrates limit the application of the tag antenna to be attached to a flat surface structure.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Flexible Silver-printed NFC Tag Antenna on Miniaturization and Bending Effect

Mohd Faudzi,

Razali,

Abdul Manaf

et al. 2023

EAJ

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Size and flexibility are the two main elements that must be considered in designing a near-field communication (NFC) tag antenna because they will determine the performance of the whole system. The previously designed NFC tag antenna, which is made of a rigid substrate such as FR-4, limited the application of the tag to only on a flat surface. The size of the tag antenna also needs to be optimised based on the application requirements since different sizes of the antenna will contribute to different electrical properties, including inductance and resistance. Therefore, this paper presents an analysis of a flexible printed tag antenna with different miniaturisation sizes and bending effects for NFC systems. The operating frequency of the proposed NFC tag antenna is 13.56 MHz, which is the same frequency as the NFC reader, allowing them to be coupled and to communicate with each other. Three sizes of silver printed tag antenna are presented, and the performance of the tag during bending is analyzed. Other tag antenna parameters and characteristics, including reflection coefficient, inductance, resistance, read range and output voltage, are also observed through simulation and accordingly measured. The results show that the Design 1 antenna has demonstrated the highest measured tag reading range of 3 cm, while the Design 2 antenna has shown good flexibility, withstanding bending at various angles and exhibiting a minimum reading range of 0.5 cm. Overall, the correlation between antenna size, flexibility and antenna performance has been determined and systematically validated.

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Section: Introductionmentioning

confidence: 99%

Analysis of Flexible Silver-printed NFC Tag Antenna on Miniaturization and Bending Effect

Mohd Faudzi,

Razali,

Abdul Manaf

et al. 2023

EAJ

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“…However, the best reason for selecting the coil structure to be applied in a near-field situation is that power can be transmitted at high efficiency, regardless of alignment, by adjusting the magnitude and phase due to the eddy current generated along the multi-turn metallic coils. The issues of the body effect size reduction and bandwidth increases based on the CA; therefore, this has become a hot topic [3]. Simultaneously, with the demand for high-speed information exchange and limited by the crowding of handheld wireless devices, utilizing near-field interaction is more advantageous than using a SIM card [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A Complete Flow of Miniaturizing Coil Antennas Based on Matching Circuit

2021

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This paper proposes and verifies a complete design flow of miniaturizing a coil antenna and widening its impedance bandwidth for near-field application, such as NFC, RFID and WPT. The proposed scheme based on mature electronic element matching technology is interpreted in detail by two equivalent circuit models in theory. For convenience, only the series equivalent circuit and its matching circuit are respectively established in the circuit simulator ADS and ANSYS HFSS to assess the scheme proposed from two aspects. The parallel equivalent circuit can be optimized by a similar approach. Then, a WPT system is established in HFSS to further verify the feasibility of miniaturization. Finally, the dimension of the coil antenna can be reduced by about 70%, and its impedance bandwidth can be increased by approximately 40% after two electronic modules are integrated.

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