?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fwww.eledia.org%2Fstudents-reports%2F316%2F&rft.title=An+Innovative+Spline-Based+Shaping+Approach+for+Ultra-Wideband+Antenna+Synthesis&rft.creator=Lizzi%2C+Leonardo&rft.creator=Viani%2C+Federico&rft.creator=Azaro%2C+Renzo&rft.creator=Rocca%2C+Paolo&rft.creator=Massa%2C+Andrea&rft.subject=TU+Technical+Reports+and+Publications&rft.description=Antennas+play+a+unique+role+in+Ultra-wideband+(UWB)+systems+because+of+their+behaviour+as+a+bandpass+filter+and+the+need+of+avoiding+undesired+distorsions+in+the+spectra+of+the+transmitted+pulses.+For+this+reason%2C+traditional+approaches+for+antenna+characterization+prove+inadeguate%2C+so+innovative+design+procedures+and+measurement+techniques+are+needed+for+antennas+in+UWB+systems+%5B1%5D.+Up+till+now%2C+the+most+common+design+approach+(i.e.%2C+the+Parametrical+Approach)+is+based+on+the+parametrization+of+some+geometrical+shapes+and+the+optimization+of+their+descriptors+for+fitting+the+requirements.+The+choice+of+the+initial+reference+geometry+is+dictated+by+the+a-priori+knowledge+on+its+range+of+application+and+achievable+performance.+In+such+a+framework%2C+examples+of+UWB+antennas+can+be+found+in+%5B2%5D%5B3%5D%5B4%5D.+Another+synthesis+approach%2C+called+Non-Parametrical+Approach%2C+considers+a+description+of+the+antenna+structure+in+terms+of+a+collection+of+elementary+building+blocks+suitably-coded+in+an+unknown+array.+In+%5B5%5D%5B6%5D+some+examples+of+antennas+synthesized+with+such+an+approach+and+considering+a+binary+encoding+are+presented.+In+this+work%2C+a+novel+UWB+antenna+design+method+is+proposed+in+order+to+exploit+the+advantages+of+both+the+aformentioned+approaches.+In+particular%2C+some+standard+geometrical+parameters+(e.g.%2C+groundplane%2C+feedline+and+substrate+dimensions)+are+described+according+to+a+parametrical+approach%2C+while+the+design+of+the+remaining+features+is+obtained+starting+from+a+spline-based+shape+generator.+This+new+design+method+exploits+the+simplicity+of+the+classical+parametric+approach+with+the+flexibility+of+the+spline-based+shape+representation+in+order+to+obtain+cheap+and+reliable+antennas+for+UWB+applications.+In+order+to+assess+the+effectiveness+of+the+proposed+approach%2C+simulated+and+experimental+results+concerned+with+a+representative+UWB+antenna+design+are+presented+and+discussed.+This+is+the+author's+version+of+the+final+version+available+at+IEEE.&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%2F316%2F1%2FDISI-11-226.C139.pdf&rft.identifier=++Lizzi%2C+Leonardo+and+Viani%2C+Federico+and+Azaro%2C+Renzo+and+Rocca%2C+Paolo+and+Massa%2C+Andrea++(2011)+An+Innovative+Spline-Based+Shaping+Approach+for+Ultra-Wideband+Antenna+Synthesis.++%5BTechnical+Report%5D++++(Unpublished)++