DocumentCode :
1197313
Title :
Experimental study of circularly polarised microstrip antennas loaded with superstrate
Author :
Row, J.-S.
Author_Institution :
Dept. of Electr. Eng., Nat. Changhua Univ. of Educ., Chang-Hua, Taiwan
Volume :
41
Issue :
21
fYear :
2005
Firstpage :
1155
Lastpage :
1157
Abstract :
The loading effects of the superstrate with various thickness on the circular polarisation (CP) performances of a cross-slot-coupled microstrip antenna are first investigated. Then, for improving the shifted centre frequency, the bad impedance matching, and the increased axial ratio, which are due to the superstrate effects, the key dimensions of the loaded antenna are adjusted to regain or even enhance the original unloaded CP performances. From the obtained experimental results, it is found that the CP bandwidth of the loaded antenna can be increased when the thickness of the superstrate is properly selected.
Keywords :
dielectric-loaded antennas; electromagnetic wave polarisation; microstrip antennas; permittivity; axial ratio; circularly polarised microstrip antennas; cross-slot-coupled microstrip antenna; impedance matching; shifted centre frequency; superstrate loading effects;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el:20052065
Filename :
1522006
Link To Document :
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