Yazar "Mezaal, Yaqeen S." seçeneğine göre listele

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    Design of compact UWB antenna based on FSSIR feeder
    (2023) Jameel, Maryam S.; Mezaal, Yaqeen S.; Atilla, Doğu Çağdaş
    This study describes a new ultra-wideband slotted patch antenna. The antenna is mounted on an FR-4 substrate with a size of 27.2x14x1.5 mm(3) and a permittivity of 4.3. A slotted patch resonator, four-stage stepped impedance resonators (FSSIR) feeder, and a reduced ground plane are features of our new antenna design. The input reflection values are 31, 30, and 32 dB at resonant frequencies of 3.3, 5.75, and 7.1 GHz, respectively, with a bandwidth range of 2.91-9.13 GHz, as determined by the simulated S11 response. The antenna was designed using the CST Microwave Studio simulator. The consequences of S11 simulations and actual measurements coincide rather well.
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    Design of miniature UWB-based antenna by employing a tri-sectional SIR feeder
    (Tech Science Press, 2022) Hussein, Ehab Dh.; Mezaal, Yaqeen S.; Bayat, Oğuz
    A novel ultra-wideband (UWB)-based microstrip antenna is presented in this work by using a slotted patch resonator, a tri-sectional stepped impedance resonator (SIR) feeder, as well as a reduced ground plane. The whole structure was realized on an FR4 substrate. The impact of incorporating several cases of ground planes on the input reflection has been thoroughly investigated under the same tri-sectional SIR feeder and by employing a slotted patch radiator. Since the complete ground plane presents an inadequate frequency response, by reducing the ground plane, the induced UWB responses are apparent while the antenna exhibits higher impedance bandwidth. The impact of both the uniform impedance resonator (UIR) as well as the SIR feeder on the input reflection has also been examined by following the same adopted reduced ground technique and using a slotted patch radiator. As a result, the UIR feeder exhibits a dual-band frequency response, when a wide notched band is incorporated in the range from 4.5–6.5 GHz. The dual-band response of the bi-sectional SIR feeder is still apparent with a narrower notched band in the frequency range from 4–5 GHz. As far as the tri-sectional SIR feeder is concerned, the UWB response is discernible without recording the existence of a notched band. Additionally, the antenna displays a higher impedance bandwidth compared with the previously reported steps. Our proposed antenna configuration is designed with highly compact dimensions and an overall size of 14 × 27.2 mm2 . Moreover, it operates under the impedance bandwidth of 2.86–10.31 GHz that can be leveraged for numerous applications where wireless systems are used. Our approach presents several advantages compared with the other reported UWB-based antennas in the literature, whereas the measured S11 pattern is in good agreement with the simulated one.
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    Miniaturized coplanar waveguide-fed UWB antenna for wireless applications
    (MDPI, 2023) Jameel, Maryam S.; Mezaal, Yaqeen S.; Atilla, Doğu Çağdaş
    This study presents a compact ultra-wideband (UWB) antenna fed by a coplanar waveguide (CPW) with huge bandwidth for the demands of modern wireless communities. To overcome some technical limitations of the employed substrate and UWB antenna design, a slotted patch resonator was used to create and simulate this antenna based on Locked-Key topology. It has been printed on a 1.5 mm-thick FR4 substrate with a dielectric constant of 4.4. A feeder with characteristic impedances of 50 Ω has been employed. A CST electromagnetic simulator has been employed to simulate and analyze the antenna design. It is operated within the UWB spectrum with a bandwidth of 10.354 GHz, spanning 3.581 to 14 GHz. The overall surface area is 27 × 25 mm2. The gain and maximum efficiency within UWB are better than 3 dBi and 82%, respectively. The antenna is fabricated, and the simulated results are correlated with the measured ones. Finally, the equivalent circuit models for the antenna and rectifier circuit are simulated and measured.