Browsing OU - Dissertations by Author "Yeary, Mark"
Now showing items 1-20 of 20
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Advances in Synthetic Aperture Radar from a Wavenumber Perspective
Dower, William (2017-12-15)This dissertation examines the wavenumber domain of Synthetic Aperture Radar (SAR) images. This domain is the inverse Fourier transform domain of a SAR image. The dissertation begins with the radar receiver's signal model ... -
Breaking the Practical Performance Barriers of Polarimetric Phased Array Weather Radars
Salazar Aquino, Cesar (2022-12-16)Phased array radars (PAR) are being proposed as an alternative to replacing the Next Generation Weather Radar (NEXRAD) network, which has been in service for more than 30 years, reaching the end of its life cycle. The PAR ... -
Digital Beamforming Applications and Demonstrations of an RF System-on-a-Chip
Steiner, Kyle (2021-08-05)EM phased array system bandwidth is conventionally constrained by the use of phase shifters for beamsteering, which results in beam squint and pulse dispersion of wideband signals. Wideband antenna performance can be ... -
Digital Predistortion of Pseudo-Orthogonal Wideband Waveforms for Dual-Polarimetric Phased Array Radars
Dunn, Zachary (2016-05)Many new and interesting radar operational modes and techniques are being explored to maximize the efficiency and utility of next-generation radar systems while complying with increasingly stringent operational and budgeting ... -
Digital-At-Every-Element Radar Resource Allocation for Multi-Target Tracking
Lucking, David (2019-05)A sensor's performance is constrained by the amount of resources at its disposal and the utilization of those resources. A radar system, for example, has a limited amount of transmit power-aperture per unit time to track ... -
Electromagnetic Modeling Methods for Microstrip Patch Antennas up to the Millimeter-Wave and Sub-Terahertz Bands
Ccoillo Ramos, Nim Rod (2022-12-16)In the current world of highly integrated communications, reliable and robust systems will be required to develop the 6G networks. The millimeter-wave band (30 GHz–100 GHz) and the sub-terahertz band (100 GHz–300 GHz) have ... -
Engineers' Self-Perceptions And A Strategy For Fostering Authentic Images of Engineers And Scientists Among Elementary School Students
McCann, Florence (2013)Over a decade since Finson’s 2002 review article, “Drawing a Scientist: What We Do and Do Not Know After Fifty Years of Drawings”, images of scientists, sometimes stereotypes, continue to be created and promoted in popular ... -
Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction
May, Ryan Michael (2014-12-12)Correction for rain attenuation is an important data quality issue when using data collected by radars operating at attenuating wavelengths, specifically C and X bands. Such issues are especially important for quantitative ... -
Frequency-Agile Microwave Filters For Radars With Simultaneous Transmission and Reception
Saeedi, Shahrokh (2015-12)Multi-band/multi-mode wireless communication systems have been receiving increased attention recently due to their potential for spectrum management in a dynamic spectral environment. Similarly radar systems, which can ... -
Fusion Of Multiple Inertial Measurements Units And Its Application In Reduced Cost, Size, Weight, And Power Synthetic Aperture Radars
Sun, Brian (2022-05-13)Position navigation and timing (PNT) is the concept of determining where an object is on the Earth (position), the destination of the object (navigation), and when the object is in these positions (timing). In autonomous ... -
Passive Radar Clutter Modeling and Emitter Selection for Ground Moving Target Indication
Lievsay, James (2017-08-01)Moving target detection with a passive radar system relies on many competing and coupled variables. When simulating a passive bistatic radar (PBR) system for ground moving target indication (GMTI) a three-dimensional model ... -
Polarimetric Radar Observations and Numerical Simulations of Tornadic Debris
Bodine, David (2014-05-09)Tornadic debris are critical aspects of tornado studies because airborne debris pose significant threats to life and property, and debris often dominate backscattered radar signals, causing biased Doppler velocity measurements. ... -
Probe-based, quasi-near-field phased array calibration
Islam, Shajid (2020-12-18)Phased array technology provides remarkable scanning flexibility and spatial search capability for the multifunction radar system, airborne radar system, and many other applications. Recent years have seen a noticeable ... -
Quantitative Analysis of Rapid-Scan Phased Array Weather Radar Benefits and Data Quality Under Various Scan Conditions
Mahre, William Andrew (2020-05-08)Currently, NEXRAD provides weather radar coverage for the contiguous United States. It is believed that a replacement system for NEXRAD will be in place by the year 2040, where a major goal of such a system is to provide ... -
Radar cross section modeling of tornadic debris and applications
Zhu, Ye (2016-05-06)Tornadic debris plays an important role in the study of tornadoes due to the dramatic threat it poses to human life, and the devastation it causes to commercial and residential property. Radar cross section (RCS) modeling ... -
Real-Time Narrowband and Wideband Beamforming Techniques for Fully-Digital RF Arrays
Thompson, Daniel (2017-12)Elemental digital beamforming offers increased flexibility for multi-function radio frequency (RF) systems supporting radar and communications applications. As fully digital arrays, components, and subsystems are becoming ... -
Robust Velocity Dealiasing for Weather Radar Based on Convolutional Neural Networks
Kim, Hyeri (2023-05-12)Doppler weather radar is an essential tool for monitoring and warning of hazardous weather phenomena. In weather radar, achieving a longer aliasing range (ra) is crucial for surveillance, and a higher aliasing velocity ... -
Self-Packaged and Low-Loss Suspended Integrated Stripline Filters for Next Generation Systems
McDaniel, Jay (2018-08-02)The method in which the frequency spectrum is currently allocated is unsustainable. An increasing number of devices are becoming wireless, overcrowding an already crowded spectrum (e.g., the ISM band). Therefore, future ... -
Signal Processing Techniques and Concept of Operations for Polarimetric Rotating Phased Array Radar
Schvartzman, David (2020-12-18)The Weather Surveillance Radar 1988 Doppler (WSR-88D) network has been operational for over 30 years and is still the primary observational instrument employed by the National Weather Service (NWS) forecasters to support ... -
Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality
Lake, John (2019-05)The microwave band is well suited to wireless applications, including radar, communications, and electronic warfare. While radar operations currently have priority in a portion of the microwave band, wireless companies are ...