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Single layer single probe feed circularly polarized triple band fractal boundary microstrip antenna for wireless applications

Published online by Cambridge University Press:  28 March 2016

V.V. Reddy  and
N.V.S.N. Sarma
V.V. Reddy*
Affiliation:
Department of Electronics and Communication Engineering, Kakatiya Institute of Technology and Science, Warangal 506 015, Telangana, India. Phone: +9948207285
N.V.S.N. Sarma
Affiliation:
Department of Electronics and Communication Engineering, National Institute of Technology, Warangal 506 015, Telangana, India
*
Corresponding author:V.V. Reddy Email: vvr@ece.kitsw.ac.in
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Abstract

Triple band circularly polarized fractal boundary microstrip antenna is proposed and experimentally studied. The two orthogonal sides of the square patch are replaced with asymmetrical fractal curves for circular polarization (CP) radiation. A 45° rotated asymmetrical fractal slot is embedded at the center of the fractal patch for triband CP operation. The indentation factors of the fractal curves are optimized for better CP emission. The inserted fractal slot redistributes the current elements on the patch for triband CP radiation. The proposed antenna is implemented over a single layer with a single probe feed, so it is simple to fabricate and is cost effective when compared with the existing stacked layered multiband antennas in the open literature. The measured 3 dB axial ratio bandwidths of the proposed antenna at 2.4, 3.4, and 5.8 GHz are 2, 1, and 1.8%, respectively, so it is well suited for WLAN and Wi-MAX wireless applications.

Keywords

Circular polarizationTribandFractal boundaryAxial ratio
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 3 , April 2017 , pp. 657 - 664
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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