A High Gain Reconfigurable Frequency Antenna Multiband for Wireless Communications

Nejdi, Ibrahime Hassan; Rhazi, Youssef; Lafkih, Mustapha Ait; Bri, Seddik

doi:10.1109/isaect50560.2020.9523654

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…The linear curve fit frequency method (Fig. 31), we have the line curve fit as follows, 𝑓𝑟 = 0.004615C + 8.328 (9) Where the sensitivity S of this sensor is given by,…”

Section: Figure 32mentioning

confidence: 99%

“…Their fractal concepts inspired the resonator engineering community to explore the potential use of these geometries in antenna research and design in Ghz regime to minimize the size of the antennas which has a high radiation efficiency, they are considered the fractal geometry in the manufacturing of the antennas [2][3][4]. In references [5][6][7][8][9][10], fractal forms were utilized to enhance antenna characteristics, whereas a combination of metamaterials and fractal shapes was employed to improve properties in references [11][12][13][14]. Using fractal forms at the nanotechnology level has proven its importance in improving the antenna characteristics in the Terahertz Regime [15].…”

Section: Introductionmentioning

confidence: 99%

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Miniaturization and Fabrication of a Novel Cross-Fractal Biosensor and Sensor for Characterizing 3D Printing Electromagnetic Properties in Polylactic Acid

Zinelabiddine,

Alzahrani,

Alwabli

et al. 2024

IEEE Access

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This study presents a new approach for characterizing the 3D printing electromagnetic properties in Polylactic Acid (PLA) using a novel cross-fractal sensor. The CST Studio Suite simulation, employing the finite element method (FEM), and the ADS simulation software, based on the equivalent circuit of this novel sensor, are utilized to enhance confidence in the convergence of simulation and measurement results. The analysis confirms that the real sensor, based on a cross-sectional fractal resonator, exhibits excellent sensitivity, selectivity, and linearity. Sensor performance is evaluated through two methods: the frequency-based approach and the S11 parameter analysis. In the frequency-based method, the sensor demonstrates a typical sensitivity of 0.0302 GHz/cm³, while in the S11 parameter analysis, it exhibits a typical sensitivity of 0.3065 dB/cm³. These results underscore the high sensitivity and linearity of this innovative sensor. The using of this novel cross fractal sensor, it promises to show how to properly adjust 3D printer parameters, potentially setting the "infill percentage" of the 3D print, this is because the proportion of air present changes when the printing percentage is changed, which can lead to (εr) and loss-tangent (tan (δ)) with varying the infill percentage, by the resonance frequency (fr) approach demonstrates a characteristic sensitivity of 0.1822 GHz/RIU. The experimental study confirmed that the fabricated sensor exhibits miniaturization (with an electrical size of λ0/8), high sensitivity, and excellent linearity in the frequency approach, with a typical sensitivity of 0.004615 GHz/%. The suggested biosensor demonstrated its capability to detect low concentrations of ethanol. These aqueous solutions, containing known alcohols like ethanol in low concentrations, enables identification of Halal and alcohol-free products in food sensing applications.

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“…The linear curve fit frequency method (Fig. 31), we have the line curve fit as follows, 𝑓𝑟 = 0.004615C + 8.328 (9) Where the sensitivity S of this sensor is given by,…”

Section: Figure 32mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Miniaturization and Fabrication of a Novel Cross-Fractal Biosensor and Sensor for Characterizing 3D Printing Electromagnetic Properties in Polylactic Acid

Zinelabiddine,

Alzahrani,

Alwabli

et al. 2024

IEEE Access

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show abstract

“…The results were plotted across a frequency range [1][2][3][4][5][6] GHz. Figure 7 shows that the simulated and measured findings are in reasonable agreement.…”

Section: Top Sidementioning

confidence: 99%

A compact miniaturized star fractal antenna for modern wireless applications

Nejdi

Fatimi

Rhazi³

et al. 2022

IJEECS

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In this paper, six-band resonant fractal antenna architecture is proposed and fabricated. The ultimate shape is established after six iterations. The resonator is starshaped, and each iteration, a hexadecagon shape from the resonator is subtracted. The antenna is designed and calculated by the numerical simulation based on the finite element method (ANSYS HFSS) and finite integration technique (CST studio). The experimental measurements were performed by the vector network analyzer AVR ROHDE AND SCHWARZ ZVB20. The gain is 4.85 dB, and the bandwidth is 0.33 GHz. The antenna’s structure allows it to work effectively in the GSM, DCS, LTE, WiMAX, WLAN, and C bands. The designed patch has a compact size of (75×75×1.6) mm3 uses as a support the FR-4 substrate for wireless equipment.

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A new multi-band fractal antenna using a triangular measured on the 1GHz to 6GHz band

Marzouk

Nejdi

Rhazi

et al. 2022

2022 2nd International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)

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A High Gain Reconfigurable Frequency Antenna Multiband for Wireless Communications

Cited by 4 publications

References 4 publications

Miniaturization and Fabrication of a Novel Cross-Fractal Biosensor and Sensor for Characterizing 3D Printing Electromagnetic Properties in Polylactic Acid

Miniaturization and Fabrication of a Novel Cross-Fractal Biosensor and Sensor for Characterizing 3D Printing Electromagnetic Properties in Polylactic Acid

A compact miniaturized star fractal antenna for modern wireless applications

A new multi-band fractal antenna using a triangular measured on the 1GHz to 6GHz band

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