Numerical and experimental analysis of circularly polarized radiating line antennas

This thesis describes progress in the development of low-profile radiating lines for producing circularly polarized radiation. A numerical study of the Annular Sector Radiating Line (ANSERLIN) antenna was undertaken using the surface patch formulation of the electric-field integral equation, and the results were generally consistent with measured data for ANSERLIN antennas. Numerical and experimental results also showed that the design of the transitions on ANSERLIN elements has a significant effect on the radiation patterns. Improved construction techniques for individual ANSERLIN elements and series-fed arrays of such elements are described. In particular, a single-level design is presented in which both the elements and the microstrip feed lines are etched on the same substrate. Numerical and experimental results for high efficiency one-port elements for use in corporate-fed arrays are given. The relative merits and performance limitations of elevated ANSERLIN elements, one-arm spirals, and two-arm spirals are discussed. The two-arm spiral appears to be the most suitable of these elements for use in a moderate bandwidth corporate-fed array. Finally, techniques for the efficient implementation of the surface patch formulation on a vector supercomputer are described. Examples showing vectorization of the matrix fill, the matrix decomposition, and the computation of far fields are given. Performance statistics showing the improvement obtained from vectorization are provided.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Smith, David Wilburn

Contributors dc:contributor

• Mayes, Paul E.

• Engineering, Electronics and Electrical
• Computer Science

Statement dc:rights

• Copyright 1990 Smith, David Wilburn

Language dc:language

eng

Identifier

(UMI)AAI9114417
AAI9114417

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/23001