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Gain enhancement over a wideband in CPW-fed compact circular patch antenna

Published online by Cambridge University Press:  13 December 2013

Kirti Vyas ,
Garima Sanyal ,
Arun Kumar Sharma  and
Pramod Kumar Singhal
Kirti Vyas*
Affiliation:
Bhagwant University, Ajmer, Rajasthan, India. Phone: +91 9929164029 Department of Electronics and Communication Engineering, Arya College of Engineering and I.T., Kukas, Jaipur, India
Garima Sanyal
Affiliation:
Department of Electronics and Communication Engineering, Arya College of Engineering and I.T., Kukas, Jaipur, India
Arun Kumar Sharma
Affiliation:
Department of Electronics and Communication Engineering, Arya College of Engineering and I.T., Kukas, Jaipur, India
Pramod Kumar Singhal
Affiliation:
Department of Electronics and Communication Engineering, Madhav Institute of Technology and Science, Gwalior, India
*
Corresponding author: K. Vyas Email: kirtivyas19@gmail.com
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Abstract

The present paper reports the gain enhancement over a wideband (12–15 GHz) in a coplanar waveguide (CPW)-fed circular patch antenna with circular defected ground structure (DGS). Two compact coplanar circular antennas have been designed and fabricated with and without DGS of same volume 18 × 20 × 1.6 mm3, built over FR4-epoxy substrate (εr = 4.4). Gain enhancement has been achieved by optimizing the current distribution with suitable DGS. For this purpose, structural designs have been optimized by parametric simulations in HFSS and CST MWS. Both the antennas can perform well in variety of wireless communication including WLAN IEEE 802.11 g/a (5.15–5.35 GHz and 5.725–5.825 GHz) and X-band applications including short range, tracking, missile guidance, and radar communication that ranges roughly from 8.29 to 11.4 GHz. The measured experimental results show that impedance bandwidth (S11 < −10 dB) of antenna with DGS is 100%. The antenna with DGS offers gain improvement by 2.7 dB for 13 GHz and 7 dB for 14 GHz. The performance of antenna with DGS is compared to conventional CPW-fed circular patch antenna (without DGS) in terms of reflection coefficient, radiation characteristics, and gain.

Keywords

Antenna designModeling and measurementsAntennas and propagation for wireless systems
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 5: MEMSWAVE Symposium 2013 , October 2014 , pp. 497 - 503
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

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