A CPW-fed 2.45 GHz wearable antenna using conductive nanomaterials for on-body applications

Mansor, M. M.; Rahim, Sharul Kamal Abdul; Hashim, U.

doi:10.1109/tenconspring.2014.6863034

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…However, recent improvements in the processing of liquid-phase CNTs have led to the production of macroscopic CNT materials with enhanced orientation and electrical conductivity. To further highlight CNT advantages, Mansor et al [61] fabricated wearable monopole antennas with CNTs and copper as conductive materials, respectively. The experimental results show that the two antennas have good consistency in characteristics.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

New Advances in Antenna Design toward Wearable Devices Based on Nanomaterials

Wang,

Zhang,

Liu

et al. 2024

Biosensors

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Wearable antennas have recently garnered significant attention due to their attractive properties and potential for creating lightweight, compact, low-cost, and multifunctional wireless communication systems. With the breakthrough progress in nanomaterial research, the use of lightweight materials has paved the way for the widespread application of wearable antennas. Compared with traditional metallic materials like copper, aluminum, and nickel, nanoscale entities including zero-dimensional (0-D) nanoparticles, one-dimensional (1-D) nanofibers or nanotubes, and two-dimensional (2-D) nanosheets exhibit superior physical, electrochemical, and performance characteristics. These properties significantly enhance the potential for constructing durable electronic composites. Furthermore, the antenna exhibits compact size and high deformation stability, accompanied by greater portability and wear resistance, owing to the high surface-to-volume ratio and flexibility of nanomaterials. This paper systematically discusses the latest advancements in wearable antennas based on 0-D, 1-D, and 2-D nanomaterials, providing a comprehensive overview of their development and future prospects in the field.

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Section: Carbon Nanotubesmentioning

confidence: 99%

New Advances in Antenna Design toward Wearable Devices Based on Nanomaterials

Wang,

Zhang,

Liu

et al. 2024

Biosensors

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“…The authors in [42] introduced an ISM band wearable antenna, utilizing indigo jeans as the substrate, comprising a rectangular ground plane and a circular patch. A CPW flexible antenna, using a poly-dimethylsiloxane substrate employing a combination of graphene and carbon nanotubes, is designed by the authors in [43] for ISM band applications. Maintaining the antenna performance within an acceptable range while reducing the size of wearable antennas is challenging.…”

Section: Introductionmentioning

confidence: 99%

Advancement of a High-Efficiency Wearable Antenna Enabling Wireless Body Area Networks

Waly,

Smida,

Aljarallah

et al. 2023

IEEE Access

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This paper presents a unique antenna that is designed to be efficient, with improved gain and partial flexibility, for use in wearable biomedical telemetry applications. The antenna design utilizes a semi-flexible RO5880 substrate material (dielectric constant, ε r = 2.2, loss tangent, (tan δ) = 0.0009) with physical dimensions measuring 0.47λ g × 0.47λ g . The model involves the incorporation of rectangular inverted "C" slots, which effectively results in a reduction of the resonant frequency. Additionally, a distributed rectangular slot is introduced on the ground plane, contributing to the augmentation of the operational bandwidth. The operational frequency of the proposed antenna design is 2.40 GHz, accompanied by a bandwidth (BW) of 320 MHz at a -10 dB level. This equates to a fractional percentage bandwidth (FBW) of 13.33% centered around the frequency of 2.40 GHz. The antenna design presented in this work demonstrates the preservation of improved gain and efficiency, achieving values of 3.67 dBi and 94%, respectively, at a frequency of 2.40 GHz. The work demonstrates through simulation and experimental outcomes that the antenna exhibits minimal impact on parameters such as gain reflection coefficient (|S 11 |), BW, and bending efficiency. Furthermore, the antenna underwent simulation and experimental testing in close proximity to the human body, revealing favorable operational characteristics. The proposed antenna exhibits substantial potential as a viable option for wearable biomedical instruments. Thus, the proposed wearable antenna design in this study offers a wideband antenna for ISM band applications, expanding bandwidth without compromising performance. Bending the antenna minimally affects gain, bandwidth, and efficiency when worn on the body, making it suitable for wearables. It also maintains a reasonably low Specific Absorption Rate (SAR), reducing wave absorption by the body. Unique features like rectangular inverted "C" slots and a distributed rectangular slot on the ground plane enhance bandwidth while maintaining performance during bending.

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“…In [25], a wearable antenna (circular patch and rectangular ground plane) for ISM band is designed using indigo jeans as a substrate. In [26], a CPW fed graphene and carbon nanotube-based flexible antenna is designed for ISM band by utilizing a flexible substrate of poly-dimethysiloxane. It is always challenging to reduce the size of wearable antenna and maintain the antenna performance at good range.…”

Section: Introductionmentioning

confidence: 99%

Wideband Wearable Antenna for Biomedical Telemetry Applications

et al. 2020

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This paper presents a wideband, low-profile and semi-flexible antenna for wearable biomedical telemetry applications. The antenna is designed on a semi-flexible material of RT/duroid 5880 (r = 2.2, tanδ = 0.0004) with an overall dimensions of 17 mm × 25 mm × 0.787 mm (0.2λ • × 0.29λ • × 0.009λ •). A conventional rectangular patch is modified by adding rectangular slots to lower the resonant frequency, and the partial ground plane is modified to enhance the operational bandwidth. The final antenna model operates at 2.4 GHz with a 10-dB bandwidth (fractional bandwidth) of 1380 MHz (59.7 % at the centre frequency of 2.4 GHz). The proposed antenna maintains high gain (2.50 dBi at 2.4 GHz) and efficiency (93 % at 2.4 GHz). It is proved from the simulations and experimental results that the antenna has negligible effects in terms of reflection coefficient, bandwidth, gain, and efficiency when it is bent. Moreover, the antenna is simulated and experimentally tested in proximity of the human body, which shows good performance. The proposed wideband antenna is a promising candidate for compact wearable biomedical devices. INDEX TERMS On-body antenna, wideband antenna, wearable antenna, SAR, flexible antenna, biomedical antenna.

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A CPW-fed 2.45 GHz wearable antenna using conductive nanomaterials for on-body applications

Cited by 10 publications

References 17 publications

New Advances in Antenna Design toward Wearable Devices Based on Nanomaterials

New Advances in Antenna Design toward Wearable Devices Based on Nanomaterials

Advancement of a High-Efficiency Wearable Antenna Enabling Wireless Body Area Networks

Wideband Wearable Antenna for Biomedical Telemetry Applications

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