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Author: search.filters.author.Torrungrueng, DanaiSubject: search.filters.subject.Antenna array

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    Design of antenna arrays by using modified fruit fly optimization algorithm
    (2021-05-19)
    Kawdungta, Supakit
    ;
    Torrungrueng, Danai
    ;
    Lang, Alongkorn
    ;
    Phongcharoenpanich, Chuwong
    This research paper proposed the modified fruit fly optimization algorithm (MFOA) to design antenna arrays. The MFOA is used to estimate parameters of three configurations of antenna arrays. There are linear, planar and circular uniform antenna arrays. From numerical results, the MFOA is effective in determining antenna array parameters. The proposed algorithm has advantages in easy implementation, global search space and fast convergence rate.
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    Quadri-Cluster Broadband Circularly-Polarized Sequentially-Rotated Metasurface-Based Antenna Array for C-Band Satellite Communications
    (2021-01-01)
    Supreeyatitikul, Nathapat
    ;
    Torrungrueng, Danai
    ;
    Phongcharoenpanich, Chuwong
    This research proposes a compact quadri-cluster broadband circularly polarized (CP) sequentially-rotated metasurface-based (MTS) antenna array for the C-band frequency spectrum. One cluster of the quadri-cluster MTS-based antenna array consisted of 4 times 4 S-shaped periodically-arranged MTS elements. The sequentially-rotated feed network was utilized to realize circular polarization and improve the impedance bandwidth (IBW), 3-dB axial ratio bandwidth (ARBW) and 3-dB boresight gain bandwidth of the quadri-cluster MTS-based antenna array. Simulations were performed and results were compared with experiments. The measured IBW and ARBW were 84.74% (4.0-9.0 GHz) and 57.6% (4.2-7.6 GHz) at the center frequency of 5.9 GHz, rendering the proposed quadri-cluster MTS-based antenna array suitable for satellite communication applications. In addition, the quadri-cluster MTS-based antenna array achieved the measured 3-dB boresight gain bandwidth of 81.3% (3.9-8.7 GHz), the maximum gain of 10.04 dBic at 5.6 GHz, and low radar cross-section. Specifically, the novelty of this research lies in the use of the sequentially-rotated feed network with the S-shaped MTS elements to effectively enhance ARBW of the quadri-cluster MTS-based antenna array for the C-band frequency spectrum.