Progress In Electromagnetics Research B
ISSN: 1937-6472
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 17 > pp. 1-14


By M. A.-A. Mangoud and H. M. Elragal

Full Article PDF (658 KB)

In this paper, Enhanced Practical Swarm Optimization (EPSO) algorithm is proposed to be applied to pattern synthesis of linear arrays. Updating formulas of global best particle position and velocity are modified to improve the convergence accuracy of classical Practical Swarm Optimization. The developed EPSO is tested and compared with a standard benchmark to be validated as an efficient optimization tool for beamforming applications. Different numerical examples are presented to illustrate the capability of EPSO for pattern synthesis with a prescribed wide nulls locations and depths. Collective multiple deep nulls approach and direct weights perturbations approach are considered to obtain adaptive wide null steering subject to peak side lobe level and minimum main beam width constraints. Starting from initial chebyshev pattern, single or multiple wide nulls are achieved by optimum perturbations of elements current amplitude or complex weights to have either symmetric or asymmetric nulls about the main beam. Proper formation of the cost function is presented for all case studies as a key factor to include the pattern constraints in the optimization process.

M. A.-A. Mangoud and H. M. Elragal, "Antenna Array Pattern Synthesis and Wide Null Control Using Enhanced Particle Swarm Optimization," Progress In Electromagnetics Research B, Vol. 17, 1-14, 2009.

1. Steyskal, H., R. A. Shore, and R. L. Haupt, "Methods for null control and their effects on the radiation pattern," IEEE Transactions on Antennas and Propagation, Vol. 34, 404-409, 1986.

2. Lu, Y. and B. K. Yeo, "Adaptive wide null steering for digital beamforming array with the complex coded genetic algorithm IEEE Int. Conf. Phased Array Systems and Technology," Dana Point CA, 557-560, 2000.

3. Karaboga, D., K. Guney, and A. Akdagli, "Antenna array pattern nulling by controlling both the amplitude and the phase using modified touring ant colony optimisation algorithm," Int. Journal of Electronics, Vol. 91, 241-251, 2004.

4. Guney, K. and A. Akdagli, "Null steering of linear antenna arrays using a modified tabu search algorithm," Progress In Electromagnetics Research,, Vol. 33, 167-182, 2001.

5. Guney, K. and M. Onay, "Amplitude-only pattern nulling of linear antenna arrays with the use of bees algorithm," Progress In Electromagnetics Research, Vol. 70, 21-36, 2007.

6. Babayigit, B., A. Akdagli, and K. Guney, "A clonal selection algorithm for null synthesizing of linear antenna arrays by amplitude control," Journal of electromagnetic Waves and Applications, Vol. 20, No. 8, 1007-1020, 2006.

7. Haupt, R. L., "Phase-only adaptive nulling with a genetic algorithm," IEEE Transactions on Antennas and Propagation, Vol. 45, 1009-1015, 1997.

8. Mouhamadou, M., P. Armand, P. Vaudon, and M. Rammal, "Interference supression of the linear antenna arrays controlled by phase with use of SQP algorithm," Progress In Electromagnetics Research, Vol. 59, 251-265, 2006.

9. Ismail, T. H. and M. M. Dawoud, "Null steering in phased arrays by controlling the element positions," IEEE Transactions on Antennas and Propagation, Vol. 39, 1561-1566, 1991.

10. Akdagli, A., K. Guney, and D. Karaboga, "Pattern nulling of linear antenna arrays by controlling only the element positions with the use of improved touring ant colony optimization algorithm," Journal of Electromagnetic Waves and Applications, Vol. 16, No. 10, 1423-1441, 2002.

11. Yang, S. W., Y. B. Gan, and A. Y. Qing, "Antenna-array pattern nulling using a differential evolution algorithm," Int. Journal of RF and Microwave Computer Aided Eng., Vol. 14, 57-63, 2004.

12. Khodier, M. M. and C. G. Christodoulou, "Linear array geometry synthesis with minimum sidelobe level and null control using particle swarm optimization," IEEE Transactions on Antennas and Propagation, Vol. 53, 2674-2679, 2005..

13. Ho, S. L., et al., "A particle swarm optimization method with enhanced global search ability for design optimizations of electromagnetic devices," IEEE Transactions on Antennas and Propagation, Vol. 42, 1107-1110, 2006.

14. Schutte, J. F. and A. A. Groenword, "A study of global optimization using particle swarms," Journal of Global Optimiz., Vol. 31, 93-108, 2005.

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

16. Bevelacqua, P. J. and C. A. Balanis, "Minimum sidelobe levels for linear arrays," IEEE Transactions on Antennas and Propagation, Vol. 55, No. 12, 3442-3449, 2007.

© Copyright 2010 EMW Publishing. All Rights Reserved