DocumentCode
1030542
Title
Circular-disk microstrip antenna with an air gap
Author
Lee, Kai-Fong ; Ho, K.Y. ; Dahele, Jashwant S.
Author_Institution
City Polytechnic of Hong Kong, Mongkok, Hong Kong
Volume
32
Issue
8
fYear
1984
fDate
8/1/1984 12:00:00 AM
Firstpage
880
Lastpage
884
Abstract
The circular-disk microstrip antenna with an air gap between the substrate and the ground plane is analyzed using the cavity-model theory. A simple formula for the resonant frequencies is obtained. The internal fields, the radiation fields, the effective loss tangent, and the input impedance are derived when the antenna is provided with a coaxial feed. The theory predicts that the air gap does not alter the relative field patterns significantly but it provides a simple parameter by which the resonant frequencies of the antenna can be tuned. Measurements have been performed on a 5 cm circular-disk microstrip antenna with an air gap and good agreement between theory and experiment is obtained.
Keywords
Disks; Microstrip antennas; Admittance; Antenna theory; Antennas and propagation; Apertures; Dielectrics; Electrons; Feeds; Microstrip antennas; Resonant frequency; Slabs;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.1984.1143428
Filename
1143428
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