eprintid: 501 rev_number: 4 eprint_status: archive userid: 5 dir: disk0/00/00/05/01 datestamp: 2011-03-16 lastmod: 2013-07-01 11:20:37 status_changed: 2013-07-01 11:20:37 type: techreport metadata_visibility: show item_issues_count: 0 creators_name: Massa, Andrea creators_name: Pastorino, Matteo creators_name: Randazzo, Andrea title: Optimization of the Directivity of a Monopulse Antenna with a Subarray Weighting by an Hybrid Differential Evolution Method ispublished: pub subjects: TU full_text_status: public keywords: Array antennas, Monopulse antennas, Evolutionary algorithm, Sum and difference patterns abstract: The optimization of the directivity of the difference patterns in monopulse array antennas is considered. A subarrayconfiguration is used in order to avoid the need for the implementation of two separate feed networks. An hybrid differential evolution method is applied to contemporarily determinate the weights of the subarrays and the group membership of the elements. Some numerical results are provided together with a validation comparison with data previously published in the literature. 2006 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. date: 2011-01 date_type: published institution: University of Trento department: informaticat refereed: TRUE referencetext: [1] D. A. McNamara, “Synthesis of sum and difference patterns for two-section monopulse arrays,” Inst. Elect. Eng. Proc., vol. 135, pt. H, no. 6, pp. 371–374, Dec. 1988. [2] D. A. McNamara, “Syntesis of sub-arrayed monopulse linear arrays through matching of independently optimum sum and difference excitations,” Inst. Elect. Eng. Proc., vol. 135, pt. H, no. 5, pp. 293–296, Oct. 1988. [3] P. Lòpez, J. A. Rodrìguez, F. Ares, and E. Moreno, “Subarray weighting for the difference patterns of monopulse antennas: Joint optimization of subarray configurations and weights,” IEEE Trans. Antennas Propagat., vol. 49, no. 11, pp. 1606–1608, Nov. 2001. [4] J. M. Johnson and Y. Ramat-Samii, “Genetic algorithms in engenering electromagnetics,” IEEE Antennas Propagat. Mag., vol. 39, no. 4, pp. 7–21, Aug. 1997. [5] S. Caorsi, A. Massa, M. Pastorino, and A. Randazzo, "Optimization of the difference patterns for monopulse antennas by an hybrid real/integer-coded differential evolution method," IEEE Trans. Antennas Propagat., vol. 53, no. 1, pp. 372–376, Jan. 2005. [6] K. Price, "An introduction to differential differential evolution," in: D. Corne, M. Dorigo, and F. Glover, New Ideas in Optimization, McGraw-Hill, New York, 1999. [7] R. Storn and K. Price, "Differential evolution - a simple and efficient heuristic for global optimization over continuous spaces," J. Global Optimization, Kluwer Academic Publishers, vol. 11, pp. 341–359, 1997. [8] K. A. Michalski, “Electromagnetic imaging of elliptical-cylindrical conductors and tunnel using a differential evolution algorithm,” Microwave Opt. Technol. Lett., vol. 28, no.3, pp. 164–169, Feb. 2001. [9] D. A. McNamara, “Excitations providing maximum directivity for difference arrays of discrete elements,” Electronic Letters, vol. 23, no. 15, pp. 780–781, July. 1987. [10] O. Einarsson, “Optimisation of planar arrays,” IEEE Trans. Antennas Propagat., vol. 27, no. 1, pp. 86-92, Jan. 1979. [11] C. A. Balanis, Antenna theory: analysis and design, New York, Wiley, 1982. [12] P. W. Hannan, “Maximum gain in monopulse difference mode,” IEEE Trans. Antennas Propagat., vol. 9, no. 3, pp. 314-331, May 1961. citation: Massa, Andrea and Pastorino, Matteo and Randazzo, Andrea (2011) Optimization of the Directivity of a Monopulse Antenna with a Subarray Weighting by an Hybrid Differential Evolution Method. [Technical Report] document_url: http://www.eledia.org/students-reports/501/1/DISI-11-006.R101.pdf