eprintid: 573 rev_number: 7 eprint_status: archive userid: 5 dir: disk0/00/00/05/73 datestamp: 2003-08-29 lastmod: 2013-06-28 14:15:17 status_changed: 2013-06-28 14:15:17 type: techreport metadata_visibility: show item_issues_count: 0 creators_name: Caorsi, Salvatore creators_name: Massa, Andrea creators_name: Pastorino, Matteo creators_name: Randazzo, Andrea title: Synthesis of sum and difference patterns for monopulse antennas by an hybrid real/integer-coded differential evolution method ispublished: inpress subjects: TU full_text_status: public keywords: Array antennas, Monopulse antennas, Evolutionary algorithm, Sum and difference patterns note: Submitted for consideration for publication IEEE Trans on Antennas Propagation abstract: The synthesis of sum and difference patterns of monopulse antennas is considered in this paper. The synthesis problem is recast as an optimization problem by defining a suitable cost function based on the constraints on the side lobe levels. A subarray configuration is considered and the excitations of the difference pattern are approximately determined. The optimization problem is efficently solved by a differential evolution algorithm, wich is able to contemporarly handle real and integer unknowns. Numerical results are reported considering classic array configurations previusly assumed in the literature. date: 2003-07 date_type: published institution: University of Trento department: informaticat refereed: FALSE referencetext: D. A. McNamara "Synthesis of sum and difference patterns for two-section monopulse arrays", Proc. Inst. Elect. Eng., vol. 135, no. 6, pp.371 -374 1988. D. A. McNamara "Syntesis of sub-arrayed monopulse linear arrays through matching of independently optimum sum and difference excitations", Proc. Inst. Elect. Eng., vol. 135, no. 5, pp.293 -296 1988. P. López , J. A. Rodriguez , F. Ares and E. Moreno "Subarray weighting for the difference patterns of monopulse antennas: Joint optimization of subarray configurations and weights", IEEE Trans. Antennas Propag., vol. 49, pp.1606 -1608 2001. J. M. Johnson and Y. Ramat-Samii "Genetic algorithms in engenering electromagnetics", IEEE Antennas Propag. Mag., vol. 39, pp.7 -21 1997. K. Price D. Corne , M. Dorigo and F. Glover New Ideas in Optimization, 1999 :McGraw-Hill R. Storn and K. Price "Differential evolution- A simple and efficient heuristic for global optimization over continuous spaces", J. Global Optim., vol. 11, pp.341 -359 1997. 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 2001. C. A. Balanis Antenna Theory: Analysis and Design, 1982 :Wiley F. Ares , J. A. Rodriguez and E. Moreno "Optimal compromise among sum and difference patterns", J. Electromagn. Waves Appl., vol. 10, pp.1543 -1555 1996 citation: Caorsi, Salvatore and Massa, Andrea and Pastorino, Matteo and Randazzo, Andrea (2003) Synthesis of sum and difference patterns for monopulse antennas by an hybrid real/integer-coded differential evolution method. [Technical Report] (In Press) document_url: http://www.eledia.org/students-reports/573/1/043.pdf