DESIGN OF A COMPACT BROADBAND CIRCULARLY-POLARIZED SLOT ANTENNA FOR WIRELESS APPLICATIONS

Rezaeieh S. A., Şimşek S., POURAHMADAZAR J.

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol.55, no.2, pp.413-418, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1002/mop.27303
  • Journal Name: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.413-418
  • Istanbul Technical University Affiliated: Yes

Abstract

This article presents design of a compact broadband circularly-polarized square slot antenna with a coplanar waveguide feed. A circular polarization bandwidth larger than 64.7% (3172-6211 MHz) obtained with the proposed antenna by embedding two inverted-L grounded strips and a 45 degrees bended strip around corners, whereas the impedance bandwidth can be greatly improved through the tuning stubs. 3 dB axial ratio bandwidth of the proposed CP antenna is large as 64.7% in a frequency band of 3172-6211 MHz. The CP antenna operates in a frequency range from 2.25 to 6.75 GHz and 8.25 to 10.25 GHz with VSWR < 2 impedance bandwidth. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55: 413-418, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27303