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
Link To Document :
