?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F437%2F&rft.title=A+Novel+Design+Methodology+for+Integration+of+Optimized+Wideband+Elements+with+Aperiodic+Array+Topologies&rft.creator=Lizzi%2C+Leonardo&rft.creator=Oliveri%2C+Giacomo&rft.creator=Gregory%2C+M.D.&rft.creator=Werner%2C+D.H.&rft.creator=Massa%2C+Andrea&rft.subject=TU+Technical+Reports+and+Publications&rft.description=The+recent+development+of+many+new+ultra-wideband+(UWB)+array+technologies+has+created+a+demand+for+antenna+elements+that+can+effectively+operate+over+similar+bandwidths.+For+example%2C+the+polyfractal+%5B1%5D+and+RPS+%5B2%5D+topologies+are+capable+of+exhibiting+remarkably+wide+frequency+bandwidths+on+the+order+of+20%3A1%2C+40%3A1+or+even+more%2C+depending+on+the+array+size.+Often%2C+the+antenna+elements+that+are+capable+of+these+extended+bandwidths+begin+to+develop+several+lobes+in+the+radiation+pattern+and+generate+increased+cross-polarized+radiation+at+their+upper+range+of+operating+frequencies.+A+new+type+of+ultra-wideband+antenna+has+been+developed+based+on+a+spline-shaping+technique+and+a+particle+swarm+algorithm+(PSO)+%5B3%5D.+With+proper+attention+to+the+radiation+pattern%2C+cross-polarization%2C+and+return+loss+in+the+PSO+cost+function%2C+this+method+is+capable+of+producing+UWB+antenna+elements+that+minimize+all+the+aforementioned+undesirable+characteristics%2C+making+them+very+suitable+for+use+in+UWB+array+systems+with+bandwidths+up+to+4%3A1+and+perhaps+even+wider.&rft.date=2011-01&rft.type=Technical+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F437%2F1%2FDISI-11-161.C206.pdf&rft.identifier=++Lizzi%2C+Leonardo+and+Oliveri%2C+Giacomo+and+Gregory%2C+M.D.+and+Werner%2C+D.H.+and+Massa%2C+Andrea++(2011)+A+Novel+Design+Methodology+for+Integration+of+Optimized+Wideband+Elements+with+Aperiodic+Array+Topologies.++%5BTechnical+Report%5D+++++