Journal Articles

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https://hdl.handle.net/20.500.14170/1818

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Browsing Journal Articles by Subject "5G"
  • Publication
    A patch antenna with enhanced gain and bandwidth for sub-6 GHz and sub-7 GHz 5G wireless applications
    (MDPI, 2023)
    Shehab Khan Noor
    ;
    Muzammil Jusoh
    ;
    Ali Hanafiah Rambe
    ;
    Thennarasan Sabapathy
    ;
    Hamsakutty Vettikalladi
    ;
    Ali M. Albishi
    ;
    Mohamed Himdi
    This paper presents a novel microstrip patch antenna design using slots and parasitic strips to operate at the n77 (3.3–4.2 GHz)/n78 (3.3–3.8 GHz) band of sub-6 GHz and n96 (5.9–7.1 GHz) band of sub-7 GHz under 5G New Radio. The proposed antenna is simulated and fabricated using an FR-4 substrate with a relative permittivity of 4.3 and copper of 0.035 mm thickness for the ground and radiating planes. A conventional patch antenna with a slot is also designed and fabricated for comparison. A comprehensive analysis of both designs is carried out to prove the superiority of the proposed antenna over conventional dual-band patch antennas. The proposed antenna achieves a wider bandwidth of 160 MHz at 3.45 GHz and 220 MHz at 5.9 GHz, with gains of 3.83 dBi and 0.576 dBi, respectively, compared to the conventional patch antenna with gains of 2.83 dBi and 0.1 dBi at the two frequencies. Parametric studies are conducted to investigate the effect of the parasitic strip’s width and length on antenna performance. The results of this study have significant implications for the deployment of high-gain compact patch antennas for sub-6 GHz and sub-7 GHz 5G wireless communications and demonstrate the potential of the proposed design to enhance performance and efficiency in these frequency bands.
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  • Publication
    Negative refraction metamaterial with low loss property at millimeter wave spectrum
    (Institute of Advanced Engineering and Science (IAES), 2020)
    B. A. F. Esmail
    ;
    H. A. Majid
    ;
    F. A. Saparudin
    ;
    Muzammil Jusoh
    ;
    A. Y. Ashyap
    ;
    Najib Al-Fadhali
    ;
    M. K. A. Rahim
    The design of the millimeter-wave (MMW) metamaterials (MMs) unit cell operates at 28 GHz is presented and numerically investigated. The proposed structure composed of a modified split ring resonator (MSRR) printed on both sides of the substrate layer. Popular MM structures such as S-shape, G-shape, and Ω-shape are adjusted to operate at the 28 GHz for comparison purpose. MSRR achieves a wide bandwidth of 1.1 GHz in comparison with its counterparts at the resonance frequency. Moreover, the proposed structure presents very low losses by providing the highest transmission coefficient, S21, at the corresponding frequency region. The radiation loss is substantially suppressed and the negativity of the constitutive parameters of the proposed MM structure is maintained. By applying the principle of the electromagnetically induced transparency (EIT) phenomenon, the MSRR unit cell induces opposite currents on both sides of the substrate which leads to canceling out the scattering fields and suppresses the radiation loss. The constitutive parameters of the MM structures are retrieved using well known retrieval algorithm. The proposed structure can be used to enhance the performance of fifth generation (5G) antenna such as the gain and bandwidth.