BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Istanbul BEGIN:DAYLIGHT DTSTART:20380119T061407 TZOFFSETFROM:+0300 TZOFFSETTO:+0300 RRULE:FREQ=YEARLY;BYDAY=3TU;BYMONTH=1 TZNAME:+03 END:DAYLIGHT BEGIN:STANDARD DTSTART:20160907T000000 TZOFFSETFROM:+0300 TZOFFSETTO:+0300 RRULE:FREQ=YEARLY;BYDAY=1WE;BYMONTH=9 TZNAME:+03 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260625T121359Z UID:F1150756-3478-4D7F-9F16-103D6875F8CD DTSTART;TZID=Europe/Istanbul:20260618T140000 DTEND;TZID=Europe/Istanbul:20260618T150000 DESCRIPTION:BRIDGING THE ELECTRO-THERMAL DIVIDE: MULTI-PHYSICAL MODELING AN D DESIGN OF ACTIVE ANTENNA SYSTEMS\n\nLecturer: PhD Candidate Feza Turgay Çelik from Delft University of Technology\n\nDate : Thursday\, June 18\, 2026\nTime: 14:00 – 15:00\nPlace: D-231 Sevim Tan Auditorium\, METU\, A nkara\n\nWho: All interested are cordially invited. The event is free of c harge.\n\nAbstract\n\nThe dense hardware integration of next-generation wi reless networks has converted active phased array engineering from a purel y electromagnetic discipline into a highly coupled electro-thermal joint p roblem. High operational power densities and the low efficiency of active RF front-ends cause severe localized heat accumulation\, creating a dynami c feedback loop that alters power amplifier (PA) performance and destabili zes beamforming integrity. This seminar presents a comprehensive analysis of these multi-physical trade-offs\, structured around three foundational research pillars. First\, a holistic five-stage iterative electro-thermal framework based on a power-wave formulation is presented\, demonstrating h ow device self-heating\, antenna mismatch\, mutual coupling\, and beam-sca nning affect side-lobe level (SLL)\, radiation pattern\, and maximum radia ted power. Second\, to bypass the computational load of traditional numeri cal thermal solvers\, a physics-assisted antenna-level Compact Thermal Mod el (CTM) is introduced. This model positions the radiator as an active hea t-exchange component and establishes a novel\, flux-based\, power-independ ent metric\, the Antenna Cooling Factor (ACF)\, to quantify and compare th e intrinsic dissipation efficacy of diverse topologies in near-real time. Finally\, the talk details the physical realization of dual-functional ant enna and array architectures optimized under concurrent electromagnetic an d thermal constraints. These include three-dimensional (3D) finned heatsin k antennas combined with Complementary Split-Ring Resonator (CSRR) isolati on walls for space-wave decoupling and bandwidth extension\, alongside man ufacturing-friendly 2.5D cavity-backed designs with slotted metallic sidew alls that nearly double the absolute power-handling threshold of active sy stems.\n\nSpeaker(s): Feza Turgay Çelik\n\nRoom: Sevim Tan Auditorium\, B ldg: Electrical and Electronics Engineering\, Middle East Technical Univer sity\, Ankara\, Ankara\, Türkiye LOCATION:Room: Sevim Tan Auditorium\, Bldg: Electrical and Electronics Engi neering\, Middle East Technical University\, Ankara\, Ankara\, Türkiye ORGANIZER:sema.dumanli@bogazici.edu.tr SEQUENCE:44 SUMMARY:IEEE AP/ED/MTT/EMC Turkey Lecturer Talks/PhD Candidate Feza Turgay Çelik URL;VALUE=URI:https://events.vtools.ieee.org/m/562675 X-ALT-DESC:Description: <br /><p class="MsoNormal" style="margin-bottom: 6. 0pt\; text-align: justify\;"><strong>BRIDGING THE ELECTRO-THERMAL DIVIDE:< /strong> MULTI-PHYSICAL MODELING AND DESIGN OF ACTIVE ANTENNA SYSTEMS</p>\ n<p class="MsoNormal" style="margin-bottom: 6.0pt\; text-align: justify\;" ><strong>Lecturer:</strong> PhD Candidate Feza Turgay &Ccedil\;elik from&n bsp\;Delft University of Technology</p>\n<p class="MsoNormal" style="margi n-bottom: 6.0pt\; text-align: justify\;"><strong>Date :</strong> &nbsp\; & nbsp\;Thursday\, June 18\, 2026<br><strong>Time: </strong>&nbsp\; &nbsp\;1 4:00 &ndash\; 15:00&nbsp\;<br><strong>Place:</strong> &nbsp\; &nbsp\;D-231 Sevim Tan Auditorium\, METU\, Ankara</p>\n<p class="MsoNormal" style="mar gin-bottom: 6.0pt\; text-align: justify\;"><strong>Who:</strong> &nbsp\; & nbsp\;All interested are cordially invited. The event is free of charge.</ p>\n<p class="MsoTitle" style="text-align: center\;"><strong><span lang="E N-GB" style="font-size: 11.0pt\; mso-bidi-font-size: 10.0pt\; font-family: 'Calibri'\,sans-serif\;">Abstract</span></strong></p>\n<p class="MsoNorma l" style="text-align: justify\;"><span lang="EN-US" style="font-family: 'C alibri'\,sans-serif\;">The dense hardware integration of next-generation w ireless networks has converted active phased array engineering from a pure ly electromagnetic discipline into a highly coupled electro-thermal joint problem. High operational power densities and the low efficiency of active RF front-ends cause severe localized heat accumulation\, creating a dynam ic feedback loop that alters power amplifier (PA) performance and destabil izes beamforming integrity. This seminar presents a comprehensive analysis of these multi-physical trade-offs\, structured around three foundational research pillars. First\, a holistic five-stage iterative electro-thermal framework based on a power-wave formulation is presented\, demonstrating how device self-heating\, antenna mismatch\, mutual coupling\, and beam-sc anning affect side-lobe level (SLL)\, radiation pattern\, and maximum radi ated power. Second\, to bypass the computational load of traditional numer ical thermal solvers\, a physics-assisted antenna-level Compact Thermal Mo del (CTM) is introduced. This model positions the radiator as an active he at-exchange component and establishes a novel\, flux-based\, power-indepen dent metric\, the Antenna Cooling Factor (ACF)\, to quantify and compare t he intrinsic dissipation efficacy of diverse topologies in near-real time. Finally\, the talk details the physical realization of dual-functional an tenna and array architectures optimized under concurrent electromagnetic a nd thermal constraints. These include three-dimensional (3D) finned heatsi nk antennas combined with Complementary Split-Ring Resonator (CSRR) isolat ion walls for space-wave decoupling and bandwidth extension\, alongside ma nufacturing-friendly 2.5D cavity-backed designs with slotted metallic side walls that nearly double the absolute power-handling threshold of active s ystems.</span></p> END:VEVENT END:VCALENDAR