DocumentCode
974594
Title
Admittance of a cavity-backed annular slot antenna
Author
Galejs, J. ; Thompson, T.W.
Author_Institution
Sylvania Electric Products, Waltham, MA-USA
Volume
10
Issue
6
fYear
1962
fDate
11/1/1962 12:00:00 AM
Firstpage
671
Lastpage
678
Abstract
An annular slot antenna which is backed by a cylindrical or a coaxial cavity is excited by a current sheet in the slot plane which exhibits no azimuthal ( 
) variation. The integral equation which relates the radial electric field in the slot plane to the linear source current density is solved by variational techniques. The numerical calculations emphasize narrow slots and shallow cavities. The slot antennas may resonate with cavity depth 
. A resonant antenna exhibits nearly the same bandwidth as the slot which is backed by 
deep cavity. Dielectric cavity loading decreases the size of a resonant cavity, but it also decreases the antenna bandwidth.
) variation. The integral equation which relates the radial electric field in the slot plane to the linear source current density is solved by variational techniques. The numerical calculations emphasize narrow slots and shallow cavities. The slot antennas may resonate with cavity depth . A resonant antenna exhibits nearly the same bandwidth as the slot which is backed by deep cavity. Dielectric cavity loading decreases the size of a resonant cavity, but it also decreases the antenna bandwidth.Keywords
Cavity resonators; Coaxial resonators; Slot antennas; Admittance; Antennas and propagation; Bandwidth; Coaxial components; Current density; Dielectric resonator antennas; Loaded antennas; Resonance; Slot antennas; Voltage;
fLanguage
English
Journal_Title
Antennas and Propagation, IRE Transactions on
Publisher
ieee
ISSN
0096-1973
Type
jour
DOI
10.1109/TAP.1962.1137933
Filename
1137933
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