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Compact dual-band truncated patch antenna with fractal defected ground structure for wireless applications

Published online by Cambridge University Press:  01 June 2015

B. Rama Sanjeeva Reddy  and
D. Vakula
B. Rama Sanjeeva Reddy*
Affiliation:
Department of ECE, National Institute of Technology, Warangal, India. Phone: +91 944 097 47 34
D. Vakula
Affiliation:
Department of ECE, National Institute of Technology, Warangal, India. Phone: +91 944 097 47 34
*
Corresponding author: B. R. Sanjeeva Reddy Email: [email protected]
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Abstract

In this paper, a compact, dual-band patch antenna is proposed over Minkowski fractal defected ground structure (DGS) for bandwidth enhancement of global positioning system (GPS) applications. The proposed design combines the truncated dual L-shaped slits cut on diagonal corners of radiating patch and fractal defect on the metallic ground plane. This concept shifts the frequencies to lower bands with improvement in antenna radiation properties. By deploying symmetrical and asymmetrical boundaries to the structure for the fractal DGS on metallic ground plane, improvement in bandwidth and gain are obtained. Compact antenna size is achieved for dual-band GPS frequencies of L1 (1.575 GHz) and L2 (1.227 GHz). The measured results for antenna prototype are (1.2–1.245 GHz): L2 band and (1.51–1.59 GHz): L1 band for 10 dB return loss bandwidth with better pattern radiation. Gain value with and without DGS is observed for compact antenna overall volume of 0.32λ0 × 0.32λ0 × 0.024λ0.

Keywords

Defected ground structureSpur linesMinkowski fractal patch antennaGain and impedance bandwidth
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 1 , February 2017 , pp. 163 - 170
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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