BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Australia/Sydney BEGIN:DAYLIGHT DTSTART:20221002T030000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=10 TZNAME:AEDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20220403T020000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 TZNAME:AEST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20220903T060100Z UID:1ED9B0B6-3DCF-412D-99F5-E218585D5F36 DTSTART;TZID=Australia/Sydney:20220831T190000 DTEND;TZID=Australia/Sydney:20220831T200000 DESCRIPTION:No other antenna concept has more names. At present these anten nas are known as Fabry-Perot resonant cavity antennas\, just Resonant Cavi ty Antennas (RCA)\, Partial Reflector Surface (PRS) based antennas\, Elect romagnetic Band Gap (EBG) Resonator antennas (ERAs) and Two Dimensional Le aky-Wave Antennas\, and more names are forthcoming. Yet they all have more or less the same configuration consisting of a resonant cavity\, formed b etween a partially reflecting superstructure and a fully reflecting (groun d) plane. The resonant cavity is excited by a small feed antenna. Hence\, they are referred to as resonant cavity antennas (RCAs) in this presentati on. Since the concept of using a “partially reflecting sheet array” su perstructure to significantly enhance the directivity was disclosed by Tre ntini in 1956\, it has been an attractive concept to several antenna resea rchers for several reasons\, including its theoretical elegance\, relation ships to other wellresearched area such as leaky-waves\, EBG\, frequency s elective surfaces and metasurfaces\, and practical advantages as a low-cos t simple way to achieve high-gain (15-25 dBi) from an efficient planar ant enna without an array\, which requires a feed network. The RCA concept is one of the main beneficiaries of the surge of research on electromagnetic periodic structures in the last decade\, first inspired by EBG and then to some extent by metamaterials. As a result\, RCAs gained a tremendous impr ovement in performance in the last 10 years\, in addition to other advanta ges such as size reduction. As an example\, achieving 10% gain bandwidth f rom such an antenna with a PSS was a major breakthrough in 2006 but now th ere are prototypes with gain bandwidths greater than 50%. Until recently m ost RCAs required an area in the range of 25-100 square wavelengths but th e latest extremely wideband RCAs are very compact\, requiring only 1.5-2 s quare wavelengths at the lowest operating frequency. Once limited to a sel ect group of researchers\, these advantages have attracted many new resear chers to RCA research domain\, and the list is growing fast\, as demonstra ted by the diversity of authors in recent RCA publications. RCAs have alre ady replaced other types of antennas\, for example as feeds for reflectors .\n\nThis presentation will take the audience through historical achieveme nts of RCA technology\, giving emphasis to breakthroughs in the last 20 ye ars up to a recent method of steering its beam continuously in 2D (i.e.\, azimuth and elevation).\n\nCo-sponsored by: Engineers Australia and Electr omagnetic Compatibility Society of Australia\n\nSpeaker(s): Professor Karu Esselle\, \n\nVirtual: https://events.vtools.ieee.org/m/322522 LOCATION:Virtual: https://events.vtools.ieee.org/m/322522 ORGANIZER:syed.abbas@mq.edu.au SEQUENCE:2 SUMMARY:Many names\, many advantages – from Trentini to beam steering of modern (Fabry-Perot) Resonant Cavity antennas URL;VALUE=URI:https://events.vtools.ieee.org/m/322522 X-ALT-DESC:Description: <br /><p>No other antenna concept has more names. A t present these antennas are known as Fabry-Perot resonant cavity antennas \, just Resonant Cavity Antennas (RCA)\, Partial Reflector Surface (PRS) b ased antennas\, Electromagnetic Band Gap (EBG) Resonator antennas (ERAs) a nd Two Dimensional Leaky-Wave Antennas\, and more names are forthcoming. Y et they all have more or less the same configuration consisting of a reson ant cavity\, formed between a partially reflecting superstructure and a fu lly reflecting (ground) plane. The resonant cavity is excited by a small f eed antenna. Hence\, they are referred to as resonant cavity antennas (RCA s) in this presentation. Since the concept of using a &ldquo\;partially re flecting sheet array&rdquo\; superstructure to significantly enhance the d irectivity was disclosed by Trentini in 1956\, it has been an attractive c oncept to several antenna researchers for several reasons\, including its theoretical elegance\, relationships to other wellresearched area such as leaky-waves\, EBG\, frequency selective surfaces and metasurfaces\, and p ractical advantages as a low-cost simple way to achieve high-gain (15-25 d Bi) from an efficient planar antenna without an array\, which requires a f eed network. The RCA concept is one of the main&nbsp\; beneficiaries of th e surge of research on electromagnetic periodic structures in the last dec ade\, first inspired by EBG and then to some extent by metamaterials. As a result\, RCAs gained a tremendous improvement in performance in the last 10 years\, in addition to other advantages such as size reduction. As an e xample\, achieving 10% gain bandwidth from such an antenna with a PSS was a major breakthrough in 2006 but now there are prototypes with gain bandwi dths greater than 50%. Until recently most RCAs required an area in the ra nge of 25-100 square wavelengths but the latest extremely wideband RCAs ar e very compact\, requiring only 1.5-2 square wavelengths at the lowest ope rating frequency. Once limited to a select group of researchers\, these ad vantages have attracted many new researchers to RCA research domain\, and the list is growing fast\, as demonstrated by the diversity of authors in recent RCA publications. RCAs have already replaced other types of antenna s\, for example as feeds for reflectors.</p>\n<p>This presentation will ta ke the audience through historical achievements of RCA technology\, giving emphasis to breakthroughs in the last 20 years up to a recent method of s teering its beam continuously in 2D (i.e.\, azimuth and elevation).&nbsp\; </p> END:VEVENT END:VCALENDAR