Hamilton, Dean P. (2007) Novel dispersion representation of rectangular dielectric guides with application to leaky-wave antennas. PhD thesis, University of Warwick.

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Abstract

A novel method for graphically and mathematically representing the dispersion characteristics
of electromagnetic dielectric structures is presented. The method has been used to develop
closed-form formulas to find the longitudinal propagation constant and useful frequency
range for a number of popular rectangular dielectric waveguide types. These formulas are
presented in terms of their material dependency and are guide size and operating frequency
independent. Their form is so trivial that these characteristics can now be found in just a few
seconds using a basic calculator, yet still with second order accuracy. In addition,
improvements have been made to a number of well-known formulas normally associated with
periodic grating leaky-wave antennas. These improvements allow the width of the metal strip
grating to be taken into consideration to derive the correct main beam angle, array factor
pattern and grating limits. Previously, the grating width was neglected by the formulas and the
resulting error was unacceptably high.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	Q Science > QA Mathematics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Library of Congress Subject Headings (LCSH):	Dielectric wave guides -- Mathematical models, Dispersion -- Mathematical models, Antennas (Electronics) -- Mathematical models
Official Date:	January 2007
Dates:	Date Event January 2007 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Leeson, Mark S., 1963- ; Green, Roger, 1951-
Extent:	1 v. (various pagings)
Language:	eng
URI:	http://wrap.warwick.ac.uk/id/eprint/36671

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