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DTSTAMP:20241115T154520Z
UID:1C9FBDC5-DBC0-4EC7-AC1B-BC9A76F3B5EC
DTSTART;TZID=America/New_York:20241106T120000
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DESCRIPTION:Fundamental physical limits apply to many key antenna performan
 ce parameters (gain\, Q-factor\, efficiency)\, particularly when device di
 mensions are small relative to operating wavelengths – the “electrical
 ly small” regime. These limitations cannot be exceeded by linear time-in
 variant (LTI) devices\, and can manifest as critical bottlenecks for commu
 nications and sensing technology.\n\nIn this talk\, we survey recent work 
 on moving antenna technology away from the classical LTI design paradigm a
 nd toward active\, non-linear\, and time-varying systems. Emphasis is plac
 ed on research incorporating time-varying elements into antennas and match
 ing networks with the goal\nof exceeding physical bounds on LTI antenna me
 trics. This includes direct antenna modulation (DAM)\, which treats time-v
 arying antennas and matching networks as active parts of the modulation pr
 ocess\, allowing for efficient\, extreme instantaneous radiated signal ban
 dwidths from\nelectrically small apertures. Additionally\, the co-design o
 f electrically small antennas with parametric pumping networks for broadba
 nd\, low-noise receive applications will be presented.\n\nModeling challen
 ges and simulation approaches for time-varying radiators will be discussed
  and several theoretical concepts in the area of time-varying antennas wil
 l also be surveyed\, including the extension of effective aperture to time
 -varying antennas and the effect of cross-frequency coupling on the effect
 ive receiver noise temperature.\n\nSpeaker(s): Kurt Schab\, \n\nVirtual: h
 ttps://events.vtools.ieee.org/m/441508
LOCATION:Virtual: https://events.vtools.ieee.org/m/441508
ORGANIZER:Cara.Kataria@ll.mit.edu
SEQUENCE:15
SUMMARY:Circumventing Bounds and Realizing Novel Performance Characteristic
 s using Time-Varying Antenna Systems
URL;VALUE=URI:https://events.vtools.ieee.org/m/441508
X-ALT-DESC:Description: <br /><p>Fundamental physical limits apply to many 
 key antenna performance parameters (gain\, Q-factor\, efficiency)\, partic
 ularly when device dimensions are small relative to operating wavelengths 
 &ndash\; the &ldquo\;electrically small&rdquo\; regime. These limitations 
 cannot be exceeded by linear time-invariant (LTI)&nbsp\;devices\, and can 
 manifest as critical bottlenecks for communications and sensing technology
 .</p>\n<p>In this talk\, we survey recent work on moving antenna technolog
 y away from the classical LTI design paradigm and toward active\, non-line
 ar\, and time-varying systems. Emphasis is placed on research incorporatin
 g time-varying elements into antennas and matching networks with the goal&
 nbsp\;<br>of exceeding physical bounds on LTI antenna metrics. This includ
 es direct antenna modulation (DAM)\, which treats time-varying antennas an
 d matching networks as active parts of the modulation process\, allowing f
 or efficient\, extreme instantaneous radiated signal bandwidths from&nbsp\
 ;<br>electrically small apertures. Additionally\, the co-design of electri
 cally small antennas with parametric pumping networks for broadband\, low-
 noise receive applications will be presented.&nbsp\;</p>\n<p>Modeling chal
 lenges and simulation approaches for time-varying radiators will be discus
 sed and several theoretical concepts in the area of time-varying antennas 
 will also be surveyed\, including the extension of effective aperture to t
 ime-varying antennas and the effect of cross-frequency&nbsp\;coupling on t
 he effective receiver noise temperature.</p>
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