BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Canada/Eastern BEGIN:DAYLIGHT DTSTART:20210314T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20211107T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20211004T034006Z UID:0DC00BD9-0035-4A81-9998-A093E74D0324 DTSTART;TZID=Canada/Eastern:20210429T160000 DTEND;TZID=Canada/Eastern:20210429T170000 DESCRIPTION:The University of Toronto Student Chapter of the IEEE Antennas and Propagation Society (AP-S) invites you to the following talk in our 20 20-2021 seminar series:\n\nSpace-Time Metasurfaces: Physics and Applicatio ns to Modern Communication Systems\, presented by Sajjad Taravati\, PDF at the University of Toronto\, on Thursday\, Apr. 29\, 2021\, 4-5 PM EDT.\n\ nAbstract: In this talk\, I discuss the latest findings on the theory\, de sign procedure\, practical implementation scenarios and applications of sp ace-time metasurfaces. Recent progress on space-time metasurfaces for brea king time-reversal symmetry and reciprocity reveals a great potential for applications of such metasurfaces for low-energy and energy-harvesting tel ecommunication systems\, and compact and integrated nonreciprocal devices\ , and sub-systems. Recently there has been a growing interest on four-dime nsional metasurfaces\, where adding the temporal variation to three-dimens ional metasurfaces leads to functionalities that are far beyond the capabi lities of conventional static metasurfaces. Space-time metasurfaces are ca pable of four-dimensional electromagnetic wave transformations which are s ignificantly more versatile and useful than the three-dimensional wave tra nsformations of conventional spatially variant static metamaterials and me tasurfaces. I first present key properties of space and time interfaces\, including spatial interfaces\, temporal interfaces\, and space-time interf aces\, and practical implementation of a space-time moving interface using a nonreciprocal metasurface. Next\, analysis of general STM metasurfaces will be given\, including derivation of scattered electromagnetic fields\, four-dimensional dispersion diagrams\, boundary conditions\, and spatiote mporal decomposition. Then\, I discuss about finite difference time domain (FDTD) simulation of space-time metasurfaces. I will also present some of the unique applications of space-time metasurfaces\, including nonrecipro cal full-duplex communication\, pure frequency conversion\, parametric wav e amplification\, spatiotemporal decomposition\, space-time wave diffracti on\, antenna-mixer-amplifier transceiver functionality\, radiation pattern coding\, and mixer-duplexer-antenna leaky-wave operation.\n\nSpeaker(s): Sajjad Taravati\, \n\nToronto\, Ontario\, Canada\, Virtual: https://events .vtools.ieee.org/m/269249 LOCATION:Toronto\, Ontario\, Canada\, Virtual: https://events.vtools.ieee.o rg/m/269249 ORGANIZER:pz.naseri@gmail.com SEQUENCE:8 SUMMARY:[AP-S Seminar Series] Space-Time Metasurfaces\, Sajjad Taravti\, Ap r. 29\, 4-5 PM EST URL;VALUE=URI:https://events.vtools.ieee.org/m/269249 X-ALT-DESC:Description: <br /><p>The University of Toronto Student Chapter of the IEEE Antennas and Propagation Society (AP-S) invites you to the fol lowing talk in our 2020-2021 seminar series:</p>\n<p><strong>Space-Time Me tasurfaces: Physics and Applications to Modern Communication Systems</stro ng>\, presented by<strong> Sajjad Taravati</strong>\, PDF at the Universit y of Toronto\, on <strong>Thursday\, Apr. 29\, 2021\, 4-5 PM EDT</strong>. &nbsp\;</p>\n<p>Abstract: In this talk\, I discuss the latest findings on the theory\, design procedure\, practical implementation scenarios and app lications of space-time metasurfaces. Recent progress on space-time metasu rfaces for breaking time-reversal symmetry and reciprocity reveals a great potential for applications of such metasurfaces for low-energy and energy -harvesting telecommunication systems\, and compact and integrated nonreci procal devices\, and sub-systems. Recently there has been a growing intere st on four-dimensional metasurfaces\, where adding the temporal variation to three-dimensional metasurfaces leads to functionalities that are far be yond the capabilities of conventional static metasurfaces. Space-time meta surfaces are capable of four-dimensional electromagnetic wave transformati ons which are significantly more versatile and useful than the three-dimen sional wave transformations of conventional spatially variant static metam aterials and metasurfaces. I first present key properties of space and tim e interfaces\, including spatial interfaces\, temporal interfaces\, and sp ace-time interfaces\, and practical implementation of a space-time moving interface using a nonreciprocal metasurface. Next\, analysis of general ST M metasurfaces will be given\, including derivation of scattered electroma gnetic fields\, four-dimensional dispersion diagrams\, boundary conditions \, and spatiotemporal decomposition. Then\, I discuss about finite differe nce time domain (FDTD) simulation of space-time metasurfaces. I will also present some of the unique applications of space-time metasurfaces\, inclu ding nonreciprocal full-duplex communication\, pure frequency conversion\, parametric wave amplification\, spatiotemporal decomposition\, space-time wave diffraction\, antenna-mixer-amplifier transceiver functionality\, ra diation pattern coding\, and mixer-duplexer-antenna leaky-wave operation.< /p> END:VEVENT END:VCALENDAR