BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Bucharest BEGIN:DAYLIGHT DTSTART:20210328T040000 TZOFFSETFROM:+0200 TZOFFSETTO:+0300 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:EEST END:DAYLIGHT BEGIN:STANDARD DTSTART:20211031T030000 TZOFFSETFROM:+0300 TZOFFSETTO:+0200 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:EET END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20210620T195423Z UID:293F8199-88A7-4CDC-823A-F9576678CD77 DTSTART;TZID=Europe/Bucharest:20210610T170000 DTEND;TZID=Europe/Bucharest:20210610T190000 DESCRIPTION:The rapid evolution in the wireless communication systems requi res more miniaturization of various electronic components in addition to t he major element of the wireless technology: the antenna. In this case\, a n antenna occupying a limited space should be miniaturized in order to ope rate at the desired communication bands. The performance in terms of bandw idth\, gain and so on for these antennas is extremely critical and is gove rned by fundamental limitations in size\, i.e. Chu's limit. Classical size reduction techniques with material loading and geometry shaping of the an tenna suffer from narrow bandwidth and low radiation efficiency. On the ot her hand\, attempts to increase the directivity of small antennas using su perdirective arrays are also associated with low radiation efficiency and very narrow bandwidth.\nThe recent state-of-the art in the field of miniat ure antennas shows new perspectives for the development of compact antenna s presenting directivities higher than accepted normal limits (super-direc tivity properties) as well as large bandwidth behavior. .\nBy combining th e characteristic mode analysis with an optimization algorithm\, it becomes possible to optimally manipulate the currents inside the antenna to achie ve wideband\, superdirective and efficient designs. This presentation give s some results and examples on improving performances of electrically smal l antennas.\n\nThe lecture was held by Prof. Ala SHARAIHA from University of Rennes 1\, France\, Co-Head of the Antennas and Microwave Devices Depar tment at the IETR research Laboratory (Institut d'Electronique et des Tech nologies du numéRique).\n\nThis virtual event was technically supported b y IEEE and Constanta Maritime University\, Romania.\n\nCo-sponsored by: Co nstanta Maritime University\, Romania\n\nSpeaker(s): Prof. Ala SHARAIHA\, \n\nAgenda: \n05:00 PM - 05:10 PM: Welcome message and presentation of the Lecturer by Prof. Razvan D. Tamas - Chair\, Antennas and Propagation Soci ety / Council on RFID Joint Chapter – IEEE Romania Section\n\n05:10 PM - 06:40 PM: Lecture by Prof. Ala Sharaiha - University of Rennes 1\, France Co-Head of the Antennas and Microwave Devices Department at the IETR rese arch Laboratory (Institut d'Electronique et des Technologies du numéRique ).\n\n06:40 PM - 07:00 PM:Discussion\n\nVirtual: https://events.vtools.iee e.org/m/272852 LOCATION:Virtual: https://events.vtools.ieee.org/m/272852 ORGANIZER:tamas@ieee.org SEQUENCE:7 SUMMARY:MEET THE CHALLENGE OF SMALL ANTENNAS DESIGN URL;VALUE=URI:https://events.vtools.ieee.org/m/272852 X-ALT-DESC:Description: <br /><p><span style="font-family: arial\, helvetic a\, sans-serif\; font-size: 12pt\;">The rapid evolution in the wireless co mmunication systems requires more miniaturization of various electronic co mponents in addition to the major element of the wireless technology: the antenna. In this case\, an antenna occupying a limited space should be min iaturized in order to operate at the desired communication bands. The perf ormance in terms of bandwidth\, gain and so on for these antennas is extre mely critical and is governed by fundamental limitations in size\, i.e. Ch u's limit. Classical size reduction techniques with material loading and g eometry shaping of the antenna suffer from narrow bandwidth and low radiat ion efficiency. On the other hand\, attempts to increase the directivity o f small antennas using superdirective arrays are also associated with low radiation efficiency and very narrow bandwidth.<br />The recent state-of-t he art in the field of miniature antennas shows new perspectives for the d evelopment of compact antennas presenting directivities higher than accept ed normal limits (super-directivity properties) as well as large bandwidth behavior. .<br />By combining the characteristic mode analysis with an op timization algorithm\, it becomes possible to optimally manipulate the cur rents inside the antenna to achieve wideband\, superdirective and efficien t designs. This presentation gives some results and examples on improving performances of electrically small antennas.</span></p>\n<p><span style="f ont-family: arial\, helvetica\, sans-serif\; font-size: 12pt\;">The lectur e was held by <strong>Prof. </strong><strong>Ala SHARAIHA</strong> from Un iversity of Rennes 1\, France\, Co-Head of the Antennas and Microwave Devi ces Department at the IETR research Laboratory (I<span lang="IT">nstitut d 'Electronique et des Technologies du num&eacute\;Rique</span>).</span></p> \n<p><span style="font-family: arial\, helvetica\, sans-serif\; font-size: 12pt\;">This virtual event was technically supported by IEEE and Constant a Maritime University\, Romania.</span></p><br /><br />Agenda: <br /><p><s pan style="font-family: arial\, helvetica\, sans-serif\; font-size: 12pt\; ">05:00 PM - 05:10 PM: Welcome message and presentation of the Lecturer by Prof. Razvan D. Tamas - Chair\, Antennas and Propagation Society / Counci l on RFID Joint Chapter &ndash\; IEEE Romania Section&nbsp\;</span></p>\n< p><span style="font-family: arial\, helvetica\, sans-serif\; font-size: 12 pt\;">05:10 PM - 06:40 PM: Lecture by Prof. Ala Sharaiha - University of R ennes 1\, France Co-Head of the Antennas and Microwave Devices Department at the IETR research Laboratory (I<span lang="IT">nstitut d'Electronique e t des Technologies du num&eacute\;Rique</span>).</span></p>\n<p><span styl e="font-family: arial\, helvetica\, sans-serif\; font-size: 12pt\;">06:40 PM - 07:00 PM:Discussion</span></p> END:VEVENT END:VCALENDAR