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This paper presents a pattern synthesis method of a sizeable concentric circular ring array (CCRAA) of isotropic antennas using Evolutionary Algorithms. In this method, the array is thinned using the optimum set of binary excitations to achieve the desired highly directive pencil beam patterns with lower peak side lobe level(SLL). The half-power beam width and first null beam width is kept constant to obtain such highly directive beam patterns with lower peak SLL. This pattern is not synthesized to a particular azimuth plane rather in four different ' planes from entire azimuth planes. The isotropic elements are uniformly spaced in the concentric ring. The achieved set of optimum amplitudes are constructed with either 1 or 0 using Differential Evolutionary Algorithm(DE), Genetic Algorithm (GA), and Particle Swarm Optimization Algorithm (PSO). These excitations show the state of the elements. The elements are in “ON” state or in “OFF” state depending upon the excitation ‘1’ or ‘0’. It is also helpful to reduce the complexity of the feed networks. The excitations are also verified in the whole range (0o <phi<360o) of ' planes by selecting four phi planes arbitrarily. The outcomes established the superiority of GA and DE over PSO and also the effectiveness of the proposed method.
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C. A. Balanis, "Antenna Theory, Analysis and design, 2nd Edition," John Willy & sons, New York, 1997.
R. S. Elliott, " Antenna Theory & Design, Revised Edition ," Wiley-IEEE Press, Dec, 2002.
R. J. Mailloux, " Phased Array Antenna Handbook (2nd)," Artech House: Boston, 2005.
R. L. Haupt, " Antenna Arrays: A Computational Approach ," John Wiley & Sons, 2010.
J. W. Sherman, and M. I. Skolone, "Thinning planar array antennas with ring arrays," 1958 IRE International Convention Record, Vol. 11, 77-86, 1963.
A. Chatterjee, G. K. Mohanty, and A. Mohanty "Synthesis of thinned concentric ring array antenna in predefined phi-planes using binary firefly and binary particle swarm optimization algorithm," International Journal of Numerical Modelling, Vol. 28, 164-174, 2015.
M. I. Dessouky, H. A. Sharshar, and Y. A. Albagory, "Efficient side lobe reduction technique for smallsized concentric circular arrays," Progress In Electromagnetics Research, Vol. 65, 187-200, 2006.
Y. A. Albagory, M. Dessousky, and H. Sharshar, "An approach for low-side lobe beamforming in uniform concentric circular arrays," Wireless Personal Communications, Vol. 43,No. 4, 1363-1368, 2007.
M. I. Dessouky, H. A. Sharshar, and Y. A. Albagory "Optimum normalized-Gaussian tapering window for sidelobe reduction in uni- form concentric circular arrays," Progress In Electromagnetics Research, Vol. 69, 35-46, 2007.
R. L. Haupt "Optimized element spacing for low side lobe concentric ring array," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 1, 266-268, 2008.
R. L. Haupt "Thinned concentric ring array," Proc IEEE Antennas and Propagation Int Symp. San Diego, CA, 1-4, 2008.
N. Pathak, G. K. Mahanti, S. K. Singh, J. K. Mishra, and A. Chakraborty "Synthesis of thinned planar circular array antennas using modified particle swarm optimization," Progress In Electromagnetics Research letter, Vol. 12, 87-97, 2009.
M. Fernández-Delgado, J. A. Rodrlguez-González, 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.
R. Jain and G. S. Mani, "Dynamic Thinning of antenna array using genetic algorithm," PIERB: Progress in Electromagnetic Research B, vol. 32, 1- 20, 2011.
Rajashree Jain and G. S. Mani "Solving "Antenna Array Thinning Problem" Using Genetic Algorithm " Applied Computational Intelligence and Soft Computing, Volume 2012, 14 pages, 2012