Dual-band circularly polarized antenna using combined C-shaped and L-shaped slots excited by a microstrip line

An L‐shaped slot loaded inside a C‐shaped slot is used to realize a dual‐band antenna fed by a microstrip line. Two circularly polarized waves are generated at the 1.57 and the 2.45 GHz band. The width in the C‐slot is uniform, whereas the width in the L‐slot is nonuniform. In the L‐slot, the width...

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Bibliographic Details
Published in:Microwave and optical technology letters 2011-05, Vol.53 (5), p.1041-1044
Main Authors: Chang, The-Nan, Han, Yeah-Lin
Format: Article
Language:English
Subjects:
Antennas
Bands
circular polarization
Circularity
dual-band antenna
Microstrip lines
Microwaves
On-line systems
Reproduction
slot ring antenna
Tuning
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Summary:An L‐shaped slot loaded inside a C‐shaped slot is used to realize a dual‐band antenna fed by a microstrip line. Two circularly polarized waves are generated at the 1.57 and the 2.45 GHz band. The width in the C‐slot is uniform, whereas the width in the L‐slot is nonuniform. In the L‐slot, the width in the vertical part is made wider than that in the horizontal part. We found that the width in the vertical part of the L‐slot is an efficient tuning parameter. The antenna can achieve about 6% axial ratio bandwidth at both bands. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1041–1044, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25928
ISSN:0895-2477
1098-2760
1098-2760
DOI:10.1002/mop.25928