BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Australia/Brisbane BEGIN:STANDARD DTSTART:19920301T020000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:AEST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260505T160458Z UID:5459F123-3558-451D-827F-E5D3C60187EA DTSTART;TZID=Australia/Brisbane:20260511T150000 DTEND;TZID=Australia/Brisbane:20260511T160000 DESCRIPTION:Abstract:\n\nIn the history of Antenna Engineering\, there has been only one universal method to steer the beam of any fixed-beam antenna . That’s physically tilting the antenna. This method has been implemente d in many commercial antenna systems using motorised mechanical tilting an d rotating systems. Now there is another way: Near-Field Meta-Steering\, i n which two flat phase-gradient metasurfaces (MS) are placed very close to the fixed-beam “base” antenna\, in its near field\, and are rotated i ndependently. This way\, the beam of the antenna can be steered over a lar ge range of zenith angles and the complete azimuth range of 3600\, without tilting or rotating the antenna. In fact\, no part of the system is tilte d.\n\nA Meta-Steering antenna system is only slightly taller than the base antenna itself. Lack of tilting means it is much shorter than conventiona l tilting antennas. In the future\, one electronically reconfigurable near -field metasurface may provide 2D beam steering without any mechanical rot ation.\n\nSince this method was introduced in the seminal paper in 2017\, together with the concept of Near-Field Phase Transformation\, it has been applied by many industry and academic researchers across the globe (e.g. Thales in France\, WaveUp in Italy\, TICRA in Denmark\, UCLA\, University of Wisconsin-Madison\, San Diego University\, all in USA) to develop novel antenna systems\, and to steer the beam of nearly all types of fixed-beam antennas\, e.g. Fabry-Perot/resonant cavity antennas\, reflector (dish) a ntennas\, metasurface antennas\, slot arrays\, holographic antennas\, and even some end-fire antennas\, to name a few.\n\nThe method is also known i n several names including Risley Method and Near-Field Phase Transformatio n. The surfaces are also known in different names\, e.g. meta lenses\, fla t lenses\, transmitarrays\, deflectors.\n\nSeveral different types of meta surfaces have been developed\, e.g. standard printed-circuit-board type\, all dielectric\, all metal\, hybrid and 3D-printed\, and some research out comes have led to national prizes and awards. This distinguished lecture w ill review the research conducted by the speaker’s team as well as other s in this modern and growing area of research.\n\nSpeaker(s): Prof. Karu E sselle\, \n\nRoom: 914\, Bldg: 46 (Andrew N. Liveris Building)\, The Unive rsity of Queensland\, Brisbane\, Queensland\, Australia LOCATION:Room: 914\, Bldg: 46 (Andrew N. Liveris Building)\, The University of Queensland\, Brisbane\, Queensland\, Australia ORGANIZER:h.espinosa@griffith.edu.au SEQUENCE:21 SUMMARY:Near-Field Meta-Steering – A Low-Profile Method to Steer the Beam of Any Antenna URL;VALUE=URI:https://events.vtools.ieee.org/m/558614 X-ALT-DESC:Description: <br /><p class="MsoNormal"><span style="font-size: 12pt\; color: rgb(33\, 33\, 33)\; font-family: helvetica\, arial\, sans-se rif\;"><img style="float: right\;" src="https://events.vtools.ieee.org/vto ols_ui/media/display/485379f9-fae4-4642-90aa-16ef9e2a6c2a" width="271" hei ght="339"></span></p>\n<p class="MsoNormal"><span style="font-size: 14pt\; "><strong><span style="color: rgb(33\, 33\, 33)\; font-family: helvetica\, arial\, sans-serif\;">Abstract:</span></strong></span></p>\n<p class="Mso Normal"><span style="font-size: 12pt\; color: rgb(33\, 33\, 33)\; font-fam ily: helvetica\, arial\, sans-serif\;">In the history of Antenna Engineeri ng\, there has been only one universal method to steer the beam of any fix ed-beam antenna. That&rsquo\;s physically tilting the antenna. This method has been implemented in many commercial antenna systems using motorised m echanical tilting and rotating systems. Now there is another way: Near-Fie ld Meta-Steering\, in which two flat phase-gradient metasurfaces (MS) are placed very close to the fixed-beam &ldquo\;base&rdquo\; antenna\, in its near field\, and are rotated independently. This way\, the beam of the ant enna can be steered over a large range of zenith angles and the complete a zimuth range of 360<sup>0</sup>\, without tilting or rotating the antenna. In fact\, no part of the system is tilted. </span></p>\n<p class="MsoNorm al"><span style="font-size: 12pt\; color: rgb(33\, 33\, 33)\; font-family: helvetica\, arial\, sans-serif\;">A Meta-Steering antenna system is only slightly taller than the base antenna itself. Lack of tilting means it is much shorter than conventional tilting antennas. In the future\, one elect ronically reconfigurable near-field metasurface may provide 2D beam steeri ng without any mechanical rotation.</span></p>\n<p class="MsoNormal"><span style="font-size: 12pt\; color: rgb(33\, 33\, 33)\; font-family: helvetic a\, arial\, sans-serif\;">Since this method was introduced in the seminal paper in 2017\, together with the concept of Near-Field Phase Transformati on\, it has been applied by many industry and academic researchers across the globe (e.g. Thales in France\, WaveUp in Italy\, TICRA in Denmark\, UC LA\, University of Wisconsin-Madison\, San Diego University\, all in USA) to develop novel antenna systems\, and to steer the beam of nearly all typ es of fixed-beam antennas\, e.g. Fabry-Perot/resonant cavity antennas\, re flector (dish) antennas\, metasurface antennas\, slot arrays\, holographic antennas\, and even some end-fire antennas\, to name a few. </span></p>\n <p class="MsoNormal"><span style="font-size: 12pt\; color: rgb(33\, 33\, 3 3)\; font-family: helvetica\, arial\, sans-serif\;">The method is also kno wn in several names including Risley Method and Near-Field Phase Transform ation. The surfaces are also known in different names\, e.g. meta lenses\, flat lenses\, transmitarrays\, deflectors. </span></p>\n<p><span style="f ont-size: 12pt\; font-family: helvetica\, arial\, sans-serif\; color: rgb( 33\, 33\, 33)\;">Several different types of metasurfaces have been develop ed\, e.g. standard printed-circuit-board type\, all dielectric\, all metal \, hybrid and 3D-printed\, and some research outcomes have led to national prizes and awards. This distinguished lecture will review the research co nducted by the speaker&rsquo\;s team as well as others in this modern and growing area of research.</span></p> END:VEVENT END:VCALENDAR