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New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms
New Directions in Millimeter-Wave Imaging: Systems, Circuits and Algorithms
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105244
- ISBN
- 9798291569559
- DDC
- 621.3
- 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
- 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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■00520260202105244
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■020 ▼a9798291569559
■035 ▼a(MiAaPQ)AAI32272033
■035 ▼a(MiAaPQ)umichrackham006393
■040 ▼aMiAaPQ▼cMiAaPQ
■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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