eprintid: 465 rev_number: 4 eprint_status: archive userid: 5 dir: disk0/00/00/04/65 datestamp: 2011-02-25 lastmod: 2013-07-01 09:31:48 status_changed: 2013-07-01 09:31:48 type: techreport metadata_visibility: show item_issues_count: 0 creators_name: Rocca, Paolo creators_name: Manica, Luca creators_name: Massa, Andrea title: Ant Colony Based Hybrid Approach for Optimal Compromise Sum-Difference Patterns Synthesis ispublished: pub subjects: TU full_text_status: public keywords: Sum and Difference Patterns Synthesis, Ant Colony Optimization, Hybrid Optimization abstract: Dealing with the synthesis of monopulse array antennas, many stochastic optimization algorithms have been used for the solution of the so-called optimal compromise problem between sum and difference patterns when sub-arrayed feed networks are considered. More recently, hybrid approaches, exploiting the convexity of the functional with respect to a sub-set of the unknowns (i.e., the sub-array excitation coefficients) have demonstrated their effectiveness. In this letter, an hybrid approach based on the Ant Colony Optimization (ACO) is proposed. At the first step, the ACO is used to define the sub-array membership of the array elements, while, at the second step, the sub-array weights are computed by solving a convex programming problem. The definitive version is available at www3.interscience.wiley.com date: 2010-01 date_type: published institution: University of Trento department: informaticat refereed: TRUE referencetext: [1] S. M. Sherman, Monopulse principles and techniques, Artech House, 1984. [2] M. I. Skolnik, Radar handbook, McGraw-Hill, 2008. [3] R. J. Mailloux, Phased array antenna handbook, Artech Hause, MA, 2005. [4] D. A. McNamara, Synthesis of sub-arrayed monopulse linear arrays through matching of independently optimumsum and difference excitations, IEE Proc HMicrowaves Antennas Propag 135 (1988), 371-374. [5] F. Ares, S. R. Rengarajan, J. A. Rodriguez, and E. Moreno, Optimal compromise among sum and difference patterns, J Electromag Waves Appl 10 (1996), 1543-1555. [6] P. Lopez, J. A. Rodriguez, F. Ares, and E. Moreno, Subarray weighting for difference patterns of monopulse antennas: Joint optimization of subarray configurations and weights, IEEE Trans Antennas Propag 49 (2001), 1606-1608. [7] S. Caorsi, A. Massa, M. Pastorino, and A. Randazzo, Optimization of the difference patterns for monopulse antennas by a hybrid real/integer-coded differential evolutionmethod, IEEE Trans Antennas Propag 53 (2005), 372-376. [8] Y. Chen, S. Yang, and Z. Nie, The application of a modified differential evolution strategy to some array pattern synthesis problems, IEEE Trans Antennas Propagat 56 (2008), 1919- 1927. [9] M. D’Urso and T. Isernia, Solving some array synthesis problems by means of an effective hybrid approach, IEEE Trans Antennas Propagat 55 (2007), 750-759. [10] M. D’Urso, T. Isernia, and E. F. Meliado’, An effective hybrid approach for the optimal synthesis of monopulse antennas, IEEE Trans Antennas Propag 55 (2007), 1059-1066. [11] L. Manica, P. Rocca, A. Martini, and A. Massa, An innovative approach based on a treesearching algorithm for the optimal matching of independently optimum sum and difference excitations, IEEE Trans Antennas Propag 56 (2008), 58-66. [12] M. Dorigo, V. Maniezzo, and A. Colorni, Ant system: optimization by a colony of cooperating agents, IEEE Trans Syst. Man and Cybern B 26 (1996), 29-41. [13] P. Rocca, L. Manica, F. Stringari, and A. Massa, Ant colony optimization for treesearching based synthesis of monopulse array antenna, Electron Lett 44 (2008), 783-785. [14] P. Rocca, L. Manica, and A. Massa, An improved excitation matching method based on an ant colony optimization for suboptimal-free clustering in sum-difference compromise synthesis, IEEE Trans Antennas Propag (in press 2009). [15] P. Rocca, L. Manica, and A. Massa, Hybrid approach for sub-arrayed monopulse antenna synthesis, Electron Lett 44 (2008), 75- 76. [16] P. Rocca, L. Manica, R. Azaro, and A. Massa, A hybrid approach to the synthesis of subarrayed monopulse linear arrays, IEEE Trans Antennas Propag 57 (2009), 280-283. [17] R. S. Elliott, Antenna theory and design, Wiley-Interscience IEEE Press, 2003. [18] D. A. McNamara, Direct synthesis of optimum difference patterns for discrete linear arrays using Zolotarev distribution, IEE Proc H Microw Antennas Propag 140 (1993), 445- 450. [19] The Math Works, Using Matlab - Version 5.3, 1999. citation: Rocca, Paolo and Manica, Luca and Massa, Andrea (2010) Ant Colony Based Hybrid Approach for Optimal Compromise Sum-Difference Patterns Synthesis. [Technical Report] document_url: http://www.eledia.org/students-reports/465/1/DISI-11-020.pdf