volume | PIER Journals

Abstract

In this paper, the possibility of synthesizing a linear antenna array for multiple objectives with the thinning approach is demonstrated. The thinning space is constrained to three cases (side, central, and random) parts instead of a fully filled linear array. In the case of the side part, a set of elements located on both edges of the array are removed with the optimized elements close to the center remaining unchanged. As in the case of the central part, only a set of elements close to the center are removed. In the case of a random selection of elements, the cancellation process is carried out randomly within the sides and the center. Since the amplitude weights of the elements located on the edges of the array have a small amplitude excitation, the method of side thinning gives better results than the other two cases. Moreover, in cases of side and random thinning, the last element of each side is excluded from the thinning process to maintain the aperture size. The convex algorithm (CA) is used to perform such thinning optimization. CA optimization efficiently computes a multi-objective function in coordination with the thinned array technique, such as preserving the main beam width in all cases with the reduction of the sidelobe levels, generating one or more nulls, and steering the main beam in a certain direction. The simulation results, in all cases, show that 30%-40% of the array elements can be turned off with achieving a multi-objective radiation pattern.

1. Fernandez-Delgado, M., J. A. Rodriguez-Gonzalez, R. Iglesias, S. Barro, and F. J. 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

2. Liu, Y., Z.-P. Nie, and Q. H. Liu, "A new method for the synthesis of non-uniform linear arrays with shaped power patterns," Progress In Electromagnetics Research, Vol. 107, 349-363, 2010.
doi:10.2528/PIER10060912

3. Abdulqader, A. J., J. R. Mohammed, and R. H. Thaher, "Phase-only nulling with limited number of controllable elements," Progress In Electromagnetics Research C, Vol. 99, 167-178, 2020.
doi:10.2528/PIERC20010203

4. Wang, W.-B., Q. Feng, and D. Liu, "Synthesis of thinned linear and planar antenna arrays using binary PSO algorithm," Progress In Electromagnetics Research, Vol. 127, 371-387, 2012.
doi:10.2528/PIER12020301

5. Zhang, X. and X. Zhang, "Thinning of antenna array via adaptive memetic particle swarm optimization," J. Wireless Com. Network, Vol. 2017, 183, 2017.
doi:10.1186/s13638-017-0968-2

6. Li, W.-T., X.-W. Shi, and Y.-Q. Hei, "An improved particle swarm optimization algorithm for pattern synthesis of phased arrays," Progress Electromagnetics Research, Vol. 82, 319-332, 2008.
doi:10.2528/PIER08030904

7. Jung, S.-H., et al. "Optimal design of thinned array using a hybrid genetic algorithm," Journal of Electromagnetic Engineering and Science, Vol. 21, No. 4, 261-269, 2021.
doi:10.26866/jees.2021.4.r.33

8. Oliveri, G., L. Manica, and A. Massa, "ADS-based guidelines for thinned planar arrays," IEEE Transactions on Antennas and Propagation, Vol. 58, 1935-1948, 2010.
doi:10.1109/TAP.2010.2046858

9. Zaharis, Z. D., D. G. Kampitaki, P. I. Lazaridis, A. I. Papastergiou, A. T. Hatzigaidas, and P. B. Gallion, "Improving the radiation characteristics of a base station antenna array using a particle swarm optimizer," Microwave and Optical Technology Letters, Vol. 49, 1690-1698, 2007.
doi:10.1002/mop.22505

10. Li, R., L. Xu, X.-W. Shi, N. Zhang, and Z.-Q. Lv, "Improved differential evolution strategy for antenna array pattern synthesis problems," Progress In Electromagnetics Research, Vol. 113, 429-441, 2011.
doi:10.2528/PIER11011814

11. Zhang, L., Y.-C. Jiao, Z.-B. Weng, and F.-S. Zhang, "Design of planar thinned arrays using a boolean differential evolution algorithm," IET Microwaves, Antennas & Propagation, Vol. 4, 2172-2178, 2010.
doi:10.1049/iet-map.2009.0630

12. Abdulqader, A. J., J. R. Mohammed, and R. H. Thaher, "Antenna pattern optimization via clustered arrays," Progress In Electromagnetics Research M, Vol. 95, 177-187, 2020.
doi:10.2528/PIERM20042307

13. Mosca, S. and M. Ciattaglia, "Ant colony optimization applied to array thinning," 2008 IEEE Radar Conference, 1-3, 2008.

14. Donelli, M., T. Moriyama, and M. Manekiya, "A compact switched-beam planar antenna array for wireless sensors operating at Wi-Fi band," Progress In Electromagnetics Research C, Vol. 83, 137-145, 2018.
doi:10.2528/PIERC18012004

15. Donelli, M. and P. Febvre, "An inexpensive reconfigurable planar array for Wi-Fi applications," Progress In Electromagnetics Research C, Vol. 28, 71-81, 2012.
doi:10.2528/PIERC12012304

16. Mohammed, J. R., R. H. Thaher, and A. J. Abdulqader, "Linear and planar array pattern nulling via compressed sensing," Journal of Telecommunications and Information Technology, 50-55, 2021.
doi:10.26636/jtit.2021.152921

17. 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

18. Mohammed, J. R., "Thinning a subset of selected elements for null steering using binary genetic algorithm," Progress In Electromagnetics Research M, Vol. 67, 147-155, 2018.
doi:10.2528/PIERM18021604

19. Mohammed, J. R. and A. J. Abdulqader, "Array pattern restoration under defective elements," Progress In Electromagnetics Research C, Vol. 123, 17-26, 2022.
doi:10.2528/PIERC22061101

Dr. Ahmed Jameel Abdulqader

Dr. Awan N. Mahmood

Dr. Yessar Ezzaldeen Mohammed Ali