eprintid: 462
rev_number: 6
eprint_status: archive
userid: 5
dir: disk0/00/00/04/62
datestamp: 2011-07-12
lastmod: 2013-07-01 09:22:41
status_changed: 2013-07-01 09:22:41
type: techreport
metadata_visibility: show
item_issues_count: 0
creators_name: Rocca, Paolo
creators_name: Poli, Lorenzo
creators_name: Manica, Luca
creators_name: Massa, Andrea
title: Compromise Pattern Synthesis by Means of Optimized Time-Modulated Array Solutions
ispublished: pub
subjects: TU
full_text_status: public
note: This version is a pre-print of the final version available at IEEE.
abstract: Originally, the use of time-modulated arrays was mainly devoted to the synthesis of low and ultra-low sidelobes arrays for the detection of radar signals [1]. Successively, only a few works have considered the use of time-modulated arrays for other applications (e.g., wireless communications [2]), although the first work proposing the use of time as an additional degree of freedom dates back to the 1950s [3]. Such an event has been probably caused by the main drawback of time-modulation that is the unavoidable presence of undesired sideband radiations (SRs) in the radiated field due to the periodic commutation of the RF switches between the on and off states. A detailed analysis on such a topic has been recently presented in [4], where a close-form relationship quantifying the power wasted in SR has been obtained.
date: 2011-01
date_type: published
institution: University of Trento
department: informaticat
refereed: FALSE
referencetext: [1] W. H. Kummer, A. T. Villeneuve, T. S. Fong , and F. G. Terrio, “Ultra-low sidelobes from time-modulated arrays,” IEEE Trans. Antennas Propag., vol. 11, no. 6, pp. 633-639, Nov. 1963. [2] R. W. Bickmore, “Time versus space in antenna theory,” in Microwave Scanning Antennas, R. C. Hansen, Ed. Los Altos, CA: Peninsula, 1985, vol. III, ch. 4. [3] H. E. Shanks and R. W. Bickmore, “Four-dimensional electromagnetic radiators,” Canad. J. Phys., vol. 37, pp. 263-275, Mar. 1959. [4] J. C. Brégains, J. Fondevila-Gómez, G. Franceschetti, and F. Ares, “Signal radiation and power losses of time-modulated arrays,” IEEE Trans. Antennas Propag., vol. 56, no. 6, pp. 1799-1804, Jun. 2008. [5] S. Yang, Y. B. Gan, and A. Qing, “Sideband suppression in time-modulated linear arrays by the differential evolution algorithm,” IEEE Antennas Wireless Propag. Lett., vol. 1, pp. 173-175, 2002. [6] J. Fondevila, J. C. Brégains, F. Ares, and E. Moreno, “Optimizing uniformly excited linear arrays through time modulation,” IEEE Antennas Wireless Propag. Lett., vol. 3, pp. 298-301, 2004. [7] J. Fondevila, J. C. Brégains, F. Ares, and E. Moreno, “Application of time modulation in the synthesis of sum and difference patterns by using linear arrays,” Microw. Opt. Technol. Lett., vol. 48, pp. 829-832, May 2006. [8] A. Tennant and B. Chambers, “Control of the harmonic radiation patterns of time-modulated antenna arrays,” Proc. 2008 IEEE AP-S International Symp., S. Diego, California, USA, July 5-12, 2008. [9] L. Manica, P. Rocca, A. Martini, and A. Massa, “An innovative approach based on a tree-searching algorithm for the optimal matching of independently optimum sum and difference excitations," IEEE Trans. Antennas Propag., vol. 56, no. 1, pp. 58-66, Jan. 2008.
citation:   Rocca, Paolo and Poli, Lorenzo and Manica, Luca and Massa, Andrea  (2011) Compromise Pattern Synthesis by Means of Optimized Time-Modulated Array Solutions.  [Technical Report]     
document_url: http://www.eledia.org/students-reports/462/1/DISI-11-190.C177.pdf