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 20 of 27 for “"Microwave Imaging"”.
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Ultra-Wideband Microwave Imaging Radar System
A novel way to reduce the CPU run time and memory requirement of the nonlinear inverse scattering algorithms is also proposed in this study. We propose a code-division multiplexing scheme for the nonlinear inverse scattering algorithms to reduce the computational complexity by a factor proportional …
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Microwave imaging of concrete structures from nondestructive evaluation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Size reduction of vivaldi antenna array for microwave imaging
… gain find many of applications such as radar, microwave imaging, remote sensing. To achieve these goals, a compact-sized end-fire slot antenna (TSA) is a good candidate as it offers broad impedance bandwidth and stable radiation patterns, and high gain characteristics In this project, Vivaldi …
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Design of a Microwave Imaging System for Target Identification
… details the construction and evaluation of a microwave imaging system to reconstruct images of unknown targets. In our system, we primarily use the common Wi-Fi frequencies of 2.4 GHz and 5 GHz because of the wide availability of commercial microwave components that operate at these …
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Microwave Imaging and Sensing Algorithms for Brain Stroke Diagnosis
L'abstract è presente nell'allegato / the abstract is in the attachment
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Ultra wideband antenna for microwave imaging using modified fractal structure
… The antenna was designed and optimized using CST Microwave Studio 2014. The proposed antenna is optimized to achieve a fractal shape by introducing slots in the patch at various positions with half grounded structure. A compact design has been observed as a result of optimization. Moreover, the …
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Design and characterisation of wideband antennas for microwave imaging applications
Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) are well known equipments used to generate images to aid in diagnostic procedure. However, the imaging equipments have some limitations whereby the equipments are very expensive and therefore, they are not always accessible in many …
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Analytical Modeling of Waveguide-fed Metasurfaces for Microwave Imaging and Beamforming
… revolutionary advances in antenna engineering, microwave imaging, flat optics, among others.</p><p>Yet, the common approach to model and design such metasurfaces relies on effective surface properties, a methodology that is inspired by initial metamaterial designs. This methodology is only …
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Microwave imaging for breast cancer detection. Safety assessment, quantitative imaging, and breast density classification.
L'abstract è presente nell'allegato / the abstract is in the attachment
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Synthetic aperture radar-based techniques and reconfigurable antenna design for microwave imaging of layered structures
<p>"In the past several decades, a number of microwave imaging techniques have been developed for detecting embedded objects (targets) in a homogeneous media. New applications such as nondestructive testing of layered composite structures, through-wall and medical imaging require more advanced …
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Design a high gain UWB mimo uniplanar monopole antenna with FSS array for metallic object microwave imaging
… (UMB) system plays an important role in microwave imaging (MWI) applications due to its broad bandwidth, non-ionizing radiation, and cost-efficiency. this study involves the design and development phases for the optimum solution of UMB antenna's issues. In the design phase, a compact …
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Development Of An Accurate Benchmarking System For Microwave Breast Imaging
… and implementation of benchmarking system for microwave imaging systems. The current benchmarking tools for microwave imaging setups are not adaptable. A novel method for of the development of a dielectric phantom using regression analysis is presented. This is followed by a discussion of the …
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Ultra-Wideband Imaging System For Medical Applications. Simulation models and Experimental Investigations for Early Breast Cancer & Bone Fracture Detection Using UWB Microwave Sensors
Near field imaging using microwaves in medical applications is of great current interest for its capability and accuracy in identifying features of interest, in comparison with other known screening tools. Many imaging methods have been developed over the past two decades showing the potential of …
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Formal Compensation of Sensor-Related Interactions for Microwave Tomography
… cases. The modeling of two experimental microwave imaging systems has been performed: one for medical imaging and the other for free-space dielectric characterization.
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Ultra-wideband antenna design for microwave imaging applications. Design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment.
Near field imaging using microwave in medical applications has gain much attention recently as various researches show its high ability and accuracy in illuminating object comparing to the well-known screening tools such as Magnetic Resonance Imaging (MRI), digital mammography, ultrasound etc. This …
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Combined Microwave, Ultrasound and Strain Imaging for Breast Tissue Characterization
… patients with the best chance of survival. Imaging methods are routinely used to scan for breast abnormalities, which may include X-Ray mammography, MRI, and ultrasound. The standard method is X-Ray mammography, however, using ultrasound in addition to mammography has become common practice. …
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Average Dielectric Property Analysis of Non-Uniform Structures: Tissue Phantom Development, Ultra-Wideband Transmission Measurements, and Signal Processing Techniques
… has been developed. This technique uses microwave transmission measurements to estimate the complex permittivity of the object-under-test over a range of frequencies. First, time-gating is used to reduce multipath. Second, the antenna response is deconvolved from the measured data. …
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A quasi-real-time inertialess microwave holographic imaging system
… and hardware development of a laboratory microwave imaging system which uses holographic principles. The application of an aperture synthesis technique and the electronic commutation of all antennae has resulted in a compact and economic assembly - which requires no moving parts and which, …
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Optimized techniques for real-time microwave and millimeter wave SAR imaging
"Microwave and millimeter wave synthetic aperture radar (SAR)-based imaging techniques, used for nondestructive evaluation (NDE), have shown tremendous usefulness for the inspection of a wide variety of complex composite materials and structures. Studies were performed for the optimization of …
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