Masters Theses

Abstract

"The problem of radiation from a waveguide-fed ground-plane aperture perturbed with a wedge-shaped dielectric insert was examined more carefully. The work initiated by Blumberg was continued, using a greater range of dielectric constants and smaller increments of angle.

Aperture field measurements were made over a range of dielectric constants for each wedge angle, in order to determine the change in amplitude distribution as a function of permittivity. Aperture phase measurements were also taken for selected angles. These were used with the amplitude data to predict, using numerical integration, the far-field radiation patterns of the perturbed aperture. Far-field patterns were then measured in an anechoic chamber and compared with the calculated patterns.

Results of the measurements were evaluated with respect to the application of this type of aperture loading to a beam scanning antenna. The relationship of modes appearing in the aperture amplitude distribution to the changes in far-field patterns were especially considered. A partially-filled-waveguide approximation model was developed, for which it was shown that modes similar to those found in the wedge perturbed aperture could be produced"--Abstract, page ii.

Advisor(s)

Skitek, G. G. (Gabriel G.)

Committee Member(s)

Carson, Ralph S.
Antle, Charles E.
Rivers, Jack L.

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Publisher

University of Missouri at Rolla

Publication Date

1967

Pagination

vi, 75 pages

Note about bibliography

Includes bibliographical references (page 70).

Rights

© 1967 John G. Hemmann, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Microwave measurements -- Computer simulation
Aperture antennas
Wave guides
Dielectric devices

Thesis Number

T 1977

Print OCLC #

5981074

Electronic OCLC #

913788892

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