DocumentCode
768878
Title
Small circularly polarised folded patch antenna
Author
Wong, H. ; Lau, P.-Y. ; Mak, K.M. ; Luk, K.M.
Author_Institution
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Volume
41
Issue
25
fYear
2005
Firstpage
1363
Lastpage
1365
Abstract
A small circularly polarised (CP) patch antenna with dual T-shaped probe feeds is presented. The patch is folded like a cap to generate a CP wave as well as to reduce the size of the antenna. The proposed antenna is operated at the centre frequency of 2.28 GHz with circular polarisation. The impedance bandwidth (SWR<2) is 21.8% from 2 to 2.49 GHz and the axial ratio bandwidth (AR<3 dB) is 3.5%. The measured gain is around 7.5 dBi. The antenna shows a good CP performance with a symmetric radiation pattern. The total area of reduction is 54% in comparison with the conventional half-wave patch antenna.
Keywords
UHF antennas; antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; 2 to 2.49 GHz; 2.28 GHz; 7.5 dB; antenna gain; axial ratio bandwidth; circular polarization; dual T-shaped probe feeds; impedance bandwidth; small folded patch antenna; symmetric radiation pattern;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20053677
Filename
1561757
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