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Browse Journals & Magazines > Antennas and Propagation, IRE ...> Volume:10 Issue:6 Help

Admittance of a cavity-backed annular slot antenna

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2 Author(s)
Galejs, J. ; Sylvania Electric Products, Waltham, MA-USA ; Thompson, T.

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 (phi) 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 depthz_{0}<lambda/4. A resonant antenna exhibits nearly the same bandwidth as the slot which is backed bylambda/4deep cavity. Dielectric cavity loading decreases the size of a resonant cavity, but it also decreases the antenna bandwidth.

Published in:
Antennas and Propagation, IRE Transactions on  (Volume:10 ,  Issue: 6 )

Date of Publication: November 1962

Page(s):
671 - 678
ISSN :
0096-1973
Digital Object Identifier :
10.1109/TAP.1962.1137933
Date of Current Version :
06 January 2003
Issue Date :
November 1962

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