volume | PIER Journals

Abstract

Recently, clustered antenna arrays have been proved as an efficient method in implementing the large planar arrays for massive MIMO wireless communications in 5G and beyond applications. However, obtaining optimum clustering configurations needs a high computational time, and it does not guarantee a total clustering coverage of the whole array aperture. In this paper, a new and unconventional array pattern synthesis method based on ascending/descending clustered subarray rings is presented. The method is equally applicable to the rectangular and circular planar arrays where they are first divided into multiple square or circular clustered rings starting from the largest ring at the array perimeter up to the last ring (the smallest one) at the array center. Then the amplitude distributions of these clustered rings are optimized to obtain the desired radiation characteristics subject to the user-defined constraint mask. Implementation of the proposed array at the clustered level instead of the conventional element level offers many advantages such as simplified feeding network, efficient taper efficiency, low sidelobe level, and high directivity. Simulation results show the effectiveness of the proposed method for both square and circular planar array layouts.

1. Mohammed, Jafar Ramadhan, "Minimizing grating lobes in large arrays using clustered amplitude tapers," Progress In Electromagnetics Research C, Vol. 120, 93-103, 2022.
doi:10.2528/PIERC22031706

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4. Abdulqader, Ahmed Jameel, Jafar Ramadhan Mohammed, and Raad H. Thaher, "Antenna pattern optimization via clustered arrays," Progress In Electromagnetics Research M, Vol. 95, 177-187, 2020.
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5. Jeong, Taeyong, Juho Yun, Kyunghyun Oh, Jihyung Kim, Dae Woong Woo, and Keum Cheol Hwang, "Shape and weighting optimization of a subarray for an mm-Wave phased array antenna," Applied Sciences, Vol. 11, No. 15, 6803, 2021.
doi:10.3390/app11156803

6. Mohammed, Jafar Ramadhan, "A method for thinning useless elements in the planar antenna arrays," Progress In Electromagnetics Research Letters, Vol. 97, 105-113, 2021.
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7. Abdelhay, M. A., N. O. Korany, and S. E. El-Khamy, "Synthesis of uniformly weighted sparse concentric ring arrays based on off-grid compressive sensing framework," IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 4, 448-452, 2021.
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8. Mohammed, J. R., "Synthesizing sum and difference patterns with low complexity feeding network by sharing element excitations," International Journal of Antennas and Propagation, Vol. 2017, Article ID 2563901, 7 pages, 2017.

9. Mohammed, Jafar Ramadhan, "Element selection for optimized multiwide nulls in almost uniformly excited arrays," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 4, 629-632, Apr. 2018.
doi:10.1109/LAWP.2018.2807371

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13. Mohammed, J. R., "Synthesizing non-uniform antenna arrays using tiled subarray blocks," Journal of Telecommunications and Information Technology, No. 4, 1-8, Oct. 2023.

14. Rocca, Paolo, Nicola Anselmi, Alessandro Polo, and Andrea Massa, "Modular design of hexagonal phased arrays through diamond tiles," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 5, 3598-3612, May 2020.
doi:10.1109/TAP.2019.2963561

Prof. Jafar Ramadhan Mohammed