BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Sao_Paulo BEGIN:DAYLIGHT DTSTART:20380119T001407 TZOFFSETFROM:-0300 TZOFFSETTO:-0300 RRULE:FREQ=YEARLY;BYDAY=3TU;BYMONTH=1 TZNAME:-03 END:DAYLIGHT BEGIN:STANDARD DTSTART:20190216T230000 TZOFFSETFROM:-0200 TZOFFSETTO:-0300 RRULE:FREQ=YEARLY;BYDAY=3SA;BYMONTH=2 TZNAME:-03 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20251129T011602Z UID:41BEFF72-68DF-4EA0-915A-A9A74ACD8E64 DTSTART;TZID=America/Sao_Paulo:20251125T150000 DTEND;TZID=America/Sao_Paulo:20251125T170000 DESCRIPTION:The 6G paradigm aims at achieving data rates as high as 100 Gbp s\, thus calling for the development of wireless networks and devices towa rds the sub-terahertz (sub-THz\, i.e.\, from 0.1–1 THz) bands due to the massive amount of available bandwidth\, and the presence of atmospheric w indows that allow efficient short-range communications.\n\nIn this context \, sub-THz high-gain antennas are needed to overcome the physical boundari es dictated by diffraction which indiscriminately affect any kind of wave propagation (electromagnetics\, acoustics\, etc.). As a result\, at such h igh frequencies path loss dramatically increases and highly directional be ams are needed to compensate for such losses. Unfortunately\, in most ante nna systems a gain enhancement corresponds to a reduction of the fractiona l bandwidth thus limiting the channel capacity of THz wireless links.\n\nT o this end\, the METASURFANT project between CNR and CNPq aims to find adv ance antenna solutions that combines the physics of leaky waves and that o f metasurfaces with a nonFoster behavior---also known as thick partially r eflecting surfaces (PRS)---to realize THz Fabry–Perot cavity leaky-wave antennas (FPC-LWAs) with an unprecedented gain-bandwidth figure of merit.\ n\nIn this lecture\, I will first outline the main objectives of the METAS URFANT project to give a comprehensive picture of the envisaged activities \, and then provide the audience with a theoretical overview of the most f ascinating topics covered in this research proposal. Specifically\, FPC-LW As will be introduced to explain their radiation mechanism and motivating the need for studying advanced solutions (namely\, thick PRS). I will then show the difficulties that arise when translating this concept in the THz range as a consequence of the technological constraints dictated by the a vailable technology with a brief comment on the feeding part. I will then show how an innovative application of THz time-domain spectroscopy for cha racterizing the electromagnetic response of either thin or thick PRS: an e ssential step towards the characterization of the antenna performance. I w ill conclude the lecture by identifying the open issues of this research l ine.\n\nSpeaker(s): Walter Fuscaldo\n\nBldg: Sala da Congregação\, Av. A lbert Einstein\, Nº 400 - Cidade Universitária\, Campinas\, Sao Paulo\, Brazil\, 13083-852 LOCATION:Bldg: Sala da Congregação\, Av. Albert Einstein\, Nº 400 - Cida de Universitária\, Campinas\, Sao Paulo\, Brazil\, 13083-852 ORGANIZER:f236485@dac.unicamp.br SEQUENCE:28 SUMMARY:Metasurface Antennas for High Data-Rate sub-THz Wireless Indoor Com munications URL;VALUE=URI:https://events.vtools.ieee.org/m/517316 X-ALT-DESC:Description: <br /><p>The 6G paradigm aims at achieving data rat es as high as 100 Gbps\, thus calling for the development of wireless netw orks and devices towards the sub-terahertz (sub-THz\, i.e.\, from 0.1&ndas h\;1 THz) bands due to the massive amount of available bandwidth\, and the presence of atmospheric windows that allow efficient short-range communic ations.</p>\n<p>In this context\, sub-THz high-gain antennas are needed to overcome the physical boundaries dictated by diffraction which indiscrimi nately affect any kind of wave propagation (electromagnetics\, acoustics\, etc.). As a result\, at such high frequencies path loss dramatically incr eases and highly directional beams are needed to compensate for such losse s. Unfortunately\, in most antenna systems a gain enhancement corresponds to a reduction of the fractional bandwidth thus limiting the channel capac ity of THz wireless links.</p>\n<p>To this end\, the METASURFANT project b etween CNR and CNPq aims to find advance antenna solutions that combines t he physics of leaky waves and that of metasurfaces with a nonFoster behavi or---also known as thick partially reflecting surfaces (PRS)---to realize THz Fabry&ndash\;Perot cavity leaky-wave antennas (FPC-LWAs) with an unpre cedented gain-bandwidth figure of merit.</p>\n<p>In this lecture\, I will first outline the main objectives of the METASURFANT project to give a com prehensive picture of the envisaged activities\, and then provide the audi ence with a theoretical overview of the most fascinating topics covered in this research proposal. Specifically\, FPC-LWAs will be introduced to exp lain their radiation mechanism and motivating the need for studying advanc ed solutions (namely\, thick PRS). I will then show the difficulties that arise when translating this concept in the THz range as a consequence of t he technological constraints dictated by the available technology with a b rief comment on the feeding part. I will then show how an innovative appli cation of THz time-domain spectroscopy for characterizing the electromagne tic response of either thin or thick PRS: an essential step towards the ch aracterization of the antenna performance. I will conclude the lecture by identifying the open issues of this research line.&nbsp\;</p> END:VEVENT END:VCALENDAR