Novel aperture coupled fractal antenna for Internet of wearable things (IoWT)

Malar, K. A.; Ganesh, R.S.

doi:10.1016/j.measen.2022.100533

Cited by 6 publications

(6 citation statements)

References 23 publications

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“…Also, metamaterial-inspired multilayered structures with dual-band operation are presented in [16,19], but this increases the design complexity. Similarly, another dual-band antenna with aperture-coupled multilayered fractal geometry has been reported for wearable devices [20]. In addition to dual-band antennas, tri-band wearable antennas have also been reported in the literature recently [21][22][23][24].…”

Section: Introductionmentioning

confidence: 94%

“…However, as compared to single-band and UWB antennas, it is challenging to design multiband antennas, as they require a specific impedance bandwidth within the desired frequency bands. Considering the importance of multiband antennas, several recent works reported wearable antennas operating at multiple frequency bands and utilized various substrates and design methodologies [16][17][18][19][20][21][22][23][24]. The antennas reported in [16][17][18][19][20] are dual-band antennas; however, these antennas possess comparatively large geometrical sizes.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the importance of multiband antennas, several recent works reported wearable antennas operating at multiple frequency bands and utilized various substrates and design methodologies [16][17][18][19][20][21][22][23][24]. The antennas reported in [16][17][18][19][20] are dual-band antennas; however, these antennas possess comparatively large geometrical sizes. Also, metamaterial-inspired multilayered structures with dual-band operation are presented in [16,19], but this increases the design complexity.…”

Section: Introductionmentioning

confidence: 99%

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A Conformal Tri-Band Antenna for Flexible Devices and Body-Centric Wireless Communications

Awan,

Abbas,

Naqvi

et al. 2023

Micromachines

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A conformal tri-band antenna tailored for flexible devices and body-centric wireless communications operating at the key frequency bands is proposed. The antenna is printed on a thin Rogers RT 5880 substrate, merely 0.254 mm thick, with an overall geometrical dimension of 15 × 20 × 0.254 mm3. This inventive design features a truncated corner monopole accompanied by branched stubs fed by a coplanar waveguide. The stubs, varying in length, serve as quarter-wavelength monopoles, facilitating multi-band functionality at 2.45, 3.5, and 5.8 GHz. Given the antenna’s intended applications in flexible devices and body-centric networks, the conformability of the proposed design is investigated. Furthermore, an in-depth analysis of the Specific Absorption Rate (SAR) is conducted using a four-layered human tissue model. Notably, the SAR values for the proposed geometry at 2.45, 3.5, and 5.8 GHz stand at 1.48, 1.26, and 1.1 W/kg for 1 g of tissue, and 1.52, 1.41, and 0.62 W/kg for 10 g of tissue, respectively. Remarkably, these values comfortably adhere to both FCC and European Union standards, as they remain substantially beneath the threshold values of 1.6 W/kg and 2 W/kg for 1 g and 10 g tissues, respectively. The radiation characteristics and performance of the antenna in flat and different bending configurations validate the suitability of the antenna for flexible devices and body-centric wireless communications.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Conformal Tri-Band Antenna for Flexible Devices and Body-Centric Wireless Communications

Awan,

Abbas,

Naqvi

et al. 2023

Micromachines

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“…It is found that the textile materials show a low dielectric constant as compared with polymer-based materials which make them to have lower surface wave losses [16]. Several textile microstrip patch antennas were presented [17][18][19][20][21][22][23][24][25]. For example, the design of textile conventional microstrip patch antenna to operate at 2.45 GHz was presented in [17].…”

Section: Introductionmentioning

confidence: 99%

“…In [22], the triple-band antenna was designed having compact size, but the gain is very low at a low frequency in comparison with the proposed antenna. The antenna in [23] can operate two frequency bands, but the SAR value is very high beyond the FCC limit. The research work in [24] is based on microstrip patch antenna and hybrid fractal antenna.…”

mentioning

confidence: 99%

A Dual-Band Low SAR Microstrip Patch Antenna with Jean Substrate for WBAN Applications

Thaiwirot,

Hengroemyat,

Kaewthai

et al. 2024

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents a low-profile dual-band microstrip patch antenna operated at the 2.45/5.8 GHz ISM bands, targeting wireless body area network (WBAN) applications. The proposed antenna is fabricated on a jean substrate measuring 74×82 mm2. The four corners of the conventional rectangular patch are cut to activate an additional operating frequency and to enhance the radiation pattern. The circular slot is added to the radiating patch to fine-tune the desired frequencies. The measured impedance bandwidth of the proposed antenna at 2.45 GHz and 5.8 GHz bands is 3.68% (2.40 GHz–2.49 GHz) and 3.81% (5.67 GHz–5.89 GHz), respectively. The measured maximum gains are 3.08 dBi at 2.45 GHz and 2.15 dBi at 5.8 GHz. Moreover, the antenna’s performance when placed on flat and rounded body surfaces is also investigated. The proposed antenna achieves stable radiation pattern and low specific absorption rate (SAR) value with low complexity in design. The results indicate that the proposed antenna can be a promising candidate for WBAN applications.

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