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A design of ring-shaped dual-band/multi-band circularly polarized microstrip antenna based on slots mutual coupling

Published online by Cambridge University Press:  14 January 2015

Farzad Alizadeh ,
Changiz Ghobadi ,
Javad Nourinia ,
Mahdi Dadashi  and
Rahim Barzegari
Farzad Alizadeh*
Affiliation:
Northwest Antenna and Microwave Research Laboratory, Urmia University, Urmia, Iran. Phone: +98 0914 408 9919
Changiz Ghobadi
Affiliation:
Northwest Antenna and Microwave Research Laboratory, Urmia University, Urmia, Iran. Phone: +98 0914 408 9919
Javad Nourinia
Affiliation:
Northwest Antenna and Microwave Research Laboratory, Urmia University, Urmia, Iran. Phone: +98 0914 408 9919
Mahdi Dadashi
Affiliation:
Northwest Antenna and Microwave Research Laboratory, Urmia University, Urmia, Iran. Phone: +98 0914 408 9919
Rahim Barzegari
Affiliation:
Northwest Antenna and Microwave Research Laboratory, Urmia University, Urmia, Iran. Phone: +98 0914 408 9919
*
Corresponding author:F. Alizadeh Email: st_f.alizadeh@urmia.ac.ir
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Abstract

A new approach for designing a single-feed circular microstrip antenna with dual-band/multi-band circularly polarized (CP) radiation are demonstrated and studied experimentally. It is presented that by embedding pairs of asymmetrical ring-shaped arc slots to the boundary of both circular patch and the ground plane the impedance bandwidth of the antenna increases. This can be achieved by making use of both mutual coupling between the resonances of the ring-shaped arc slots and the fundamental resonances of the circular antenna. Also, by extending the ring-shaped arc slots out with narrow slots, the circular microstrip patch antenna can perform dual-band/multi-band CP radiation. Further details of the proposed CP microstrip antenna designs are described, and typical experimental results are presented and discussed.

Keywords

Antennas and propagation for wireless systemsAntenna designModeling and measurements
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 2 , March 2016 , pp. 291 - 299
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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