Thesis (Ph. D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1993? / Includes bibliographical references (leaves 219-227).

Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

Thesis (M.S.) -- Worcester Polytechnic Institute. / Keywords: antenna; dipole; phased array; active loading. Includes bibliographical references (p. 100-102).

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This thesis describes the deployment of MIRSL's X-band dual-polarization Phase-Tilt Weather Radar (PTWR) at the University of Texas at Arlington during spring 2014. While this radar has been used to observe weather in Western Massachusetts, more observations of severe weather were required to determine the limits of its abilities in sensing more rapidly evolving weather systems. This site was chosen also for its proximity to the Dallas-Fort Worth Urban Testbed Network set up by the Center for Collaborative Adaptive Sensing of the Atmosphere (CASA), which provided the ability to compare and calibrate the PTWR data against another well-documented X-band weather radar. A data processing pipeline was developed for converting raw PTWR data to NetCDF format, which allows for easy sharing and mapping of weather data. Finally, this is the first in-depth documentation of the PTWR system and specifically the roof-mounted setup utilized for this deployment.

The following results were obtained in the presented thesis: 1. Based on a previous work on the MoM method, a software modulus was created and tested in MATLAB, which solves a small-size scanning metal array with arbitrary element position and arbitrary lumped loading. 2. The solver was applied to optimize a broadband planar array of dipoles using the concept of negative lumped loading, which was introduced by R.C. Hansen in 2003. The problem statement was formulated by E. Kratzenberg of MIT Haystack Observatory. 3. The optimization implies full testing of varied array configurations with different element numbers, dipole thicknesses, generator impedances, and lumped loading values. 4. The results obtained indicate that that both 4x4 and 6x6 arrays of dipoles may be optimized over the frequency band from 50 to 300 MHz. The optimization means that the Scan Element Pattern of the array at zenith nearly follows the theoretical limit (area gain per element).