Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"millimeter-Wave imaging"”.
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High resolution millimeter wave imaging for self-driving cars
… how we can leverage recent advances in 5G millimeter wave (mmWave) technology for imaging in self-driving cars. Specifically, the use of mmWave in 5G has led to the creation of compact phased arrays with hundreds of antenna elements that can be electronically steered. Such phased arrays can …
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Novel modulated antennas and probes for millimeter wave imaging applications
"Microwave and millimeter wave (300 MHz - 300 GHz) imaging techniques have shown great potential for a wide range of industrial and medical applications. These techniques are fundamentally based on measuring relative and coherent electromagnetic fields distributions, e.g., electric fields, around …
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Key receiver circuits for digital beamforming in millimeter-wave imaging
Millimeter-wave (MMW) frequencies have wavelengths small enough to offer sufficient spatial resolution for certain imaging applications. Advances in silicon processes have developed devices that can operate at these frequencies, which has led to the potential for low cost MMW imaging, provided that …
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Design and prototyping of a real-time millimeter wave imaging system
… is to design, prototype and test an innovative millimeter wave imaging system that operates in the frequency range of 33-35 GHz and is capable of producing rapid images of various diverse scenes. In particular, the imaging system includes two main sections, one is related to the hardware design …
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Digital phase tightening for improved spatial resolution in millimeter-wave imaging systems
Imaging systems using millimeter-wave frequencies allow for the possibilities of vehicular radar and concealed weapons detection. By using silicon technology, the integration of millimeter-wave circuits can reach new levels that were previously impossible. This thesis discusses the challenge and …
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Orthogonally coded MIMO array for Ka-band (26.5 - 40 GHz) millimeter-wave imaging
This paper introduces a multi-static millimeter wave imaging system that utilizes binary phase-shift keying (BPSK) modulation of the intermediate frequency (IF) signals with orthogonal codes, commonly called code division multiple access (CDMA). This method allows the array to distinguish the radar …
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Antenna-coupled Infrared And Millimeter-wave Detectors: Fabrication, Measurement And Optimization
… cost-effective solutions for infrared and millimeter-wave imaging. This work describes the design, fabrication, measurement, and optimization of several types of antenna-coupled detectors for LWIR (8 - 12 µm) and 94 GHz radiation. Two types of millimeter-wave antenna-coupled detectors …
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Hardware architectures for compact microwave and millimeter wave cameras
"Millimeter wave SAR imaging has shown promise as an inspection tool for human skin for characterizing burns and skin cancers. However, the current state-of-the-art in microwave camera technology is not yet suited for developing a millimeter wave camera for human skin inspection. Consequently, the …
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Generating pictures from waves : aspects of image formation
… and acoustics researchers analyze coherent sound waves using stochastic estimation theory and diffraction formulas from physics. The ability to inexpensively fabricate analog circuitry and digital logic for millimeter-wave radar and ultrasound creates opportunities in comparing diverse …
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Performance limits of RF power CMOS
… communications has prompted the exploration of millimeter-wave frequencies. Some of the applications in this regime include high-speed wireless local area networks and high data rate personal area networks at 60 GHz, automotive collision avoidance radar at 77 GHz and millimeter-wave imaging at …
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Non-invasive microwave and millimeter wave reflectometry and imaging for human skin diagnosis and materials characterization
"Microwave and millimeter wave reflectometry and synthetic aperture radar (SAR) imaging techniques have been successfully applied in many applications, such as nondestructive testing and evaluation (NDT&E), security inspection and medical diagnosis. In this dissertation, the feasibility of using …
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Non-destructive Evaluation of Food Products by Microwave and mmW Imaging
… explores an alternative solution based on microwave sensing, introducing a novel approach to contamination detection. The proposed system leverages low-power, non-ionizing microwave signals to identify foreign bodies without compromising food integrity or requiring extensive modifications to …