Broadband CPW-fed circularly polarized square slot antenna with inverted-L strips for wireless applications

Rezaeieh S. A., Kartal M.

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol.54, no.6, pp.1399-1402, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54 Issue: 6
  • Publication Date: 2012
  • Doi Number: 10.1002/mop.26851
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1399-1402
  • Istanbul Technical University Affiliated: Yes


This article proposes an impressive design of a circular polarized square slot antenna (CPSSA). The proposed single layer antenna composed of a square ground plane embedded with three unequal sized inverted-L strips around corners, which are capable of generating a resonant mode for exciting two orthogonal E vectors. Compared to the previous similar CPSSA designs, the axial-ratio bandwidth of the antenna is increased, more than two times. The designed CPSS antenna with its compact 40 x 40 x 0.8 mm3 size operates over the frequency band between 2.63 and 6.38 GHz for VSWR<2 exhibiting a 71.11% (36.1 GHz) circular polarization (CP) bandwidth. Throughout this letter, the improvement process of the axial ratio and S11 properties are presented and discussed in detailed. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:13991402, 2012; View this article online at DOI 10.1002/mop.26851