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New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms
New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms
New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms

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자료유형  
 학위논문 서양
최종처리일시  
20260202105244
ISBN  
9798291569559
DDC  
621.3
저자명  
Muppala, Aditya Varma.
서명/저자  
New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
216 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Afshari, Ehsan;Sarabandi, Kamal.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약Imaging systems are ubiquitous in our world, from our complex mammalian eyes to infrared sensors in snakes, from selfie cameras on our smartphones to the VLBI telescope system that took an image of a black hole, from MRIs and X-rays to microscopes and telescopes, they allow us to explore the universe and reveal the invisible. The most fascinating systems among these are the ones that allow us to see beyond the limits of the naked eye. An imaging radar is one such technology - familiar to travelers who have stood in an airport scanner with their arms raised. Unlike other imaging methods, radar can penetrate materials, operate at long ranges, and does not use hazardous ionizing radiation, making it ideal for applications such as concealed weapons detection, autonomous navigation, wildfire search-and-rescue, and space exploration. Despite their potential, existing imaging radar systems experience a cost-speed trade-off that has limited their development and widespread adoption. Breaking this trade-off is the key to developing the next generation of imaging radars. In this thesis, we attack this problem from three directions: antenna systems, millimeter-wave circuits and radar signal processing. First we introduce affine synthetic arrays, a technique that enables a single radar element to generate 10,000 virtual elements in real-time, breaking the fundamental cost-speed trade-off. The antenna system achieves a pencil beam with a beamwidth of 0.4° in azimuth and elevation, with the ability to scan it over a wide field of view. We then introduce fast time-domain reconstruction and deconvolution algorithms for Frequency Modulated Continuous Wave (FMCW) radar arrays. The algorithms improve computation time of 3-D radar images by two orders of magnitude compared to standard FMCW Synthetic Aperture Radar (SAR) imaging techniques. Finally, we present a 256 GHz radar system designed on a 65-nm CMOS process that achieves diffraction-limited imaging. This is the first demonstration of a coherent imaging radar system above 100 GHz implemented in standard CMOS technology. Putting the antennas, electronics and signal processing together, we demonstrate a path toward scalable, cost-effective real-time imaging radar systems.
일반주제명  
Electrical engineering
일반주제명  
Computer engineering
일반주제명  
Remote sensing
키워드  
Imaging radar
키워드  
Applied electromagnetics
키워드  
Imaging systems
기타저자  
University of Michigan Electrical and Computer Engineering
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■0820  ▼a621.3
■1001  ▼aMuppala,  Aditya  Varma.
■24510▼aNew  Directions  in  Millimeter-Wave  Imaging:  Systems,  Circuits  and  Algorithms
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a216  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Afshari,  Ehsan;Sarabandi,  Kamal.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aImaging  systems  are  ubiquitous  in  our  world,  from  our  complex  mammalian  eyes  to  infrared  sensors  in  snakes,  from  selfie  cameras  on  our  smartphones  to  the  VLBI  telescope  system  that  took  an  image  of  a  black  hole,  from  MRIs  and  X-rays  to  microscopes  and  telescopes,  they  allow  us  to  explore  the  universe  and  reveal  the  invisible.  The  most  fascinating  systems  among  these  are  the  ones  that  allow  us  to  see  beyond  the  limits  of  the  naked  eye.  An  imaging  radar  is  one  such  technology  -  familiar  to  travelers  who  have  stood  in  an  airport  scanner  with  their  arms  raised.  Unlike  other  imaging  methods,  radar  can  penetrate  materials,  operate  at  long  ranges,  and  does  not  use  hazardous  ionizing  radiation,  making  it  ideal  for  applications  such  as  concealed  weapons  detection,  autonomous  navigation,  wildfire  search-and-rescue,  and  space  exploration.  Despite  their  potential,  existing  imaging  radar  systems  experience  a  cost-speed  trade-off  that  has  limited  their  development  and  widespread  adoption.  Breaking  this  trade-off  is  the  key  to  developing  the  next  generation  of  imaging  radars.  In  this  thesis,  we  attack  this  problem  from  three  directions:  antenna  systems,  millimeter-wave  circuits  and  radar  signal  processing.  First  we  introduce  affine  synthetic  arrays,  a  technique  that  enables  a  single  radar  element  to  generate  10,000  virtual  elements  in  real-time,  breaking  the  fundamental  cost-speed  trade-off.  The  antenna  system  achieves  a  pencil  beam  with  a  beamwidth  of  0.4°  in  azimuth  and  elevation,  with  the  ability  to  scan  it  over  a  wide  field  of  view.  We  then  introduce  fast  time-domain  reconstruction  and  deconvolution  algorithms  for  Frequency  Modulated  Continuous  Wave  (FMCW)  radar  arrays.  The  algorithms  improve  computation  time  of  3-D  radar  images  by  two  orders  of  magnitude  compared  to  standard  FMCW  Synthetic  Aperture  Radar  (SAR)  imaging  techniques.  Finally,  we  present  a  256  GHz  radar  system  designed  on  a  65-nm  CMOS  process  that  achieves  diffraction-limited  imaging.  This  is  the  first  demonstration  of  a  coherent  imaging  radar  system  above  100  GHz  implemented  in  standard  CMOS  technology.  Putting  the  antennas,  electronics  and  signal  processing  together,  we  demonstrate  a  path  toward  scalable,  cost-effective  real-time  imaging  radar  systems.
■590    ▼aSchool  code:  0127.
■650  4▼aElectrical  engineering
■650  4▼aComputer  engineering
■650  4▼aRemote  sensing
■653    ▼aImaging  radar
■653    ▼aApplied  electromagnetics
■653    ▼aImaging  systems
■690    ▼a0544
■690    ▼a0464
■690    ▼a0799
■71020▼aUniversity  of  Michigan▼bElectrical  and  Computer  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359974▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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