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DESCRIPTION:Abstract:\n\nDoherty power amplifiers are widely used to achiev
 e high efficiency with high-PAPR signals\, but their extension to millimet
 re-wave frequencies is far from trivial. At high frequency\, classical Doh
 erty assumptions no longer hold\, and efficiency\, gain\, bandwidth\, line
 arity\, and implementation constraints become strongly interdependent.\n\n
 This lecture provides a design-oriented perspective on the key challenges 
 limiting high-frequency Doherty operation and discusses practical methodol
 ogies to address them. Topics include gain behaviour\, on-chip power combi
 nation\, bandwidth limitations\, and linearity degradation\, with emphasis
  on architectural trade-offs rather than idealized solutions. The discussi
 on is supported by measured GaN MMIC examples for 5G and satellite applica
 tions\, showing that successful high-frequency Doherty designs rely on bal
 anced co-design choices rather than isolated performance optimization.\n\n
 Short Bio:\nVittorio Camarchia is an Associate Professor at the Department
  of Electronics and Telecommunications\, Politecnico di Torino\, Italy. Hi
 s research focuses on high-efficiency and high-linearity RF/microwave powe
 r amplifiers for 5G/6G and satellite communications\, with emphasis on loa
 d-modulated architectures\, including Doherty\, Chireix and LMBA amplifier
 s\, GaN/GaAs MMIC design\, and broadband linearization. He is Track Editor
  for MWTL\, Chair of IEEE MTT-S TC-23 Wireless Communications for 2025–2
 026 and an IEEE MTT-S Distinguished Microwave Lecturer for 2026–2028.\n\
 nSpeaker(s): Prof. Dr. Vittorio Camarchia\, \n\nAgenda: \nPizza\n\nIntrodu
 ction of the Speaker\n\nTalk\n\nQ&amp;A\n\nRoom: Grand/Large Conference Room\,
  Bldg: Nashua Public Library\, 2 Court Street\, NASHUA\, New Hampshire\, U
 nited States\, 03060\, Virtual: https://events.vtools.ieee.org/m/565854
LOCATION:Room: Grand/Large Conference Room\, Bldg: Nashua Public Library\, 
 2 Court Street\, NASHUA\, New Hampshire\, United States\, 03060\, Virtual:
  https://events.vtools.ieee.org/m/565854
ORGANIZER:mbkazar@gmail.com
SEQUENCE:16
SUMMARY:{AI Talks with Tea&amp;Coffee #48} Distinguished Microwave Lecturers Se
 ries: High-Frequency Doherty Power Amplifiers: Challenges and Design Metho
 dologies
URL;VALUE=URI:https://events.vtools.ieee.org/m/565854
X-ALT-DESC:Description: &lt;br /&gt;&lt;p&gt;&lt;strong&gt;&lt;span style=&quot;color: rgb(0\, 0\, 0)
 \;&quot;&gt;Abstract:&lt;/span&gt;&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&lt;span style=&quot;color: rgb(132\, 63\, 1
 61)\;&quot;&gt;Doherty power amplifiers are widely used to achieve high efficiency
  with high-PAPR signals\, but their extension to millimetre-wave frequenci
 es is far from trivial. At high frequency\, classical Doherty assumptions 
 no longer hold\, and efficiency\, gain\, bandwidth\, linearity\, and imple
 mentation constraints become strongly interdependent.&lt;/span&gt;&lt;/p&gt;\n&lt;p&gt;&lt;span
  style=&quot;color: rgb(132\, 63\, 161)\;&quot;&gt;This lecture provides a design-orien
 ted perspective on the key challenges limiting high-frequency Doherty oper
 ation and discusses practical methodologies to address them. Topics includ
 e gain behaviour\, on-chip power combination\, bandwidth limitations\, and
  linearity degradation\, with emphasis on architectural trade-offs rather 
 than idealized solutions. The discussion is supported by measured GaN MMIC
  examples for 5G and satellite applications\, showing that successful high
 -frequency Doherty designs rely on balanced co-design choices rather than 
 isolated performance optimization.&lt;/span&gt;&lt;/p&gt;\n&lt;p&gt;&amp;nbsp\;&lt;/p&gt;\n&lt;p&gt;&lt;strong&gt;
 Short Bio:&lt;/strong&gt;&lt;br&gt;&lt;span style=&quot;color: rgb(35\, 111\, 161)\;&quot;&gt;Vittorio
  Camarchia is an Associate Professor at the Department of Electronics and 
 Telecommunications\, Politecnico di Torino\, Italy. His research focuses o
 n high-efficiency and high-linearity RF/microwave power amplifiers for 5G/
 6G and satellite communications\, with emphasis on load-modulated architec
 tures\, including Doherty\, Chireix and LMBA amplifiers\, GaN/GaAs MMIC de
 sign\, and broadband linearization. He is Track Editor for MWTL\, Chair of
  IEEE MTT-S TC-23 Wireless Communications for 2025&amp;ndash\;2026 and an IEEE
  MTT-S &lt;strong&gt;Distinguished Microwave Lecturer&lt;/strong&gt; for 2026&amp;ndash\;2
 028.&lt;/span&gt;&lt;/p&gt;&lt;br /&gt;&lt;br /&gt;Agenda: &lt;br /&gt;&lt;p&gt;&lt;strong&gt;Pizza&lt;/strong&gt;&lt;/p&gt;\n&lt;p
 &gt;&lt;strong&gt;Introduction of the Speaker&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&lt;strong&gt;Talk&lt;/strong
 &gt;&lt;/p&gt;\n&lt;p&gt;&lt;strong&gt;Q&amp;amp\;A&lt;/strong&gt;&lt;/p&gt;\n&lt;p&gt;&amp;nbsp\;&lt;/p&gt;
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