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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-07-03
Beam-Pattern Control via Thinned Elements Strategy in Linear and Planar Phased Arrays
By
Jafar Ramadhan Mohammed

    Prof. Jafar Ramadhan Mohammed

    College of Electronics Engineering

    Ninevah University

    Iraq

    Homepage

Progress In Electromagnetics Research Letters, Vol. 111, 79-84, 2023
doi:10.2528/PIERL23022403 | Google Scholar

Abstract
Reconfigurable antenna arrays play a major role in the current and future wireless communication systems due to their multifunctional capabilities and many other advantages. Conventionally, the array pattern reconfigurations were usually achieved by controlling the excitation amplitudes and phases of all or most of the array elements which are generally costly and complex methods. In this paper, a simple method for controlling the reconfigurability of beam-patterns of the linear and planar arrays is presented. It can be easily switched between narrow and wide beams using thinned-elements strategy. First, the array elements are divided into three groups based on their locations namely central, middle, and outer elements. Their amplitude weights are chosen to be unity, adaptive, and zero respectively. To add some desired constraints on the array beam-patterns such as limited sidelobe level and specified nulls placement, the excitation weights of the middle elements are optimized such that an abrupt change in the array taper is avoided. This also avoids an undesired change in the sidelobe pattern. A genetic algorithm is used to perform such optimization so that the produced beam-patterns are best matched to the desired ones. Moreover, the size of the thinned region controls the resulting beam width.
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Citation
Jafar Ramadhan Mohammed, "Beam-Pattern Control via Thinned Elements Strategy in Linear and Planar Phased Arrays," Progress In Electromagnetics Research Letters, Vol. 111, 79-84, 2023.
doi:10.2528/PIERL23022403
References

1. Fernandez-Delgado, M., J. Rodriguez-Gonzalez, R. Iglesias, S. Barro, and F. Ares-Pena, "Fast array thinning using global optimization methods," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 16, 2259-2271, 2010.
doi:10.1163/156939310793699136        Google Scholar

2. Oliveri, G., M. Donelli, and A. Massa, "Linear array thinning exploiting almost difference sets," IEEE Transactions on Antennas and Propagation, Vol. 57, 3800-3812, 2009.
doi:10.1109/TAP.2009.2027243        Google Scholar

3. Morabito, A. F., R. Palmeri, V. A. Morabito, A. R. Laganà, and T. Isernia, "Single-surface phaseless characterization of antennas via hierarchically ordered optimizations," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 1, 461-474, Jan. 2019, doi: 10.1109/TAP.2018.2877270.
doi:10.1109/TAP.2018.2877270        Google Scholar

4. Mohammed, J. R., "Optimal null steering method in uniformly excited equally spaced linear array by optimizing two edge elements," Electronics Letters, Vol. 53, No. 13, 835-837, Jun. 2017.
doi:10.1049/el.2017.1405        Google Scholar

5. Sayidmarie, K. and J. R. Mohammed, "Performance of a wide angle and wide band nulling method for phased arrays," Progress In Electromagnetics Research M, Vol. 33, 239-249, 2013.
doi:10.2528/PIERM13100603        Google Scholar

6. 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, 7 pages, Article ID 2563901, 2017.        Google Scholar

7. Mohammed, J. R., "Thinning a subset of selected elements for null steering using binary genetic algorithm," Progress In Electromagnetics Research M, Vol. 67, 147-157, 2018.
doi:10.2528/PIERM18021604        Google Scholar

8. Mohammed, J. R., "A method for thinning useless elements in the planar antenna arrays," Progress In Electromagnetics Research Letters, Vol. 97, 105-113, 2021.
doi:10.2528/PIERL21022104        Google Scholar

9. Balanis, C. A., Antenna Theory, Analysis and Design, 4th Ed., Wiley, 2016.

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