Circularly polarized strips integrated microstrip antenna for energy harvesting applications

S. B. Vignesh, Nasimuddin*, A. Alphones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A circularly polarized (CP) microstrip antenna with four strips is proposed for wide beamwidth and RF energy harvesting applications. Four strips along the diagonal directions are integrated symmetrically onto a square patch radiator for CP radiation with wide beamwidth. To improve the impedance matching of the antenna, a stub is integrated along the orthogonal direction of the patch radiator. The antenna is designed on FR4 substrate and an antenna prototype shows a measured 10-dB return loss bandwidth of 120 MHz (2.53-2.65 GHz) with a maximum gain of 4.6 dBic. The measured 3-dB axial ratio (AR) bandwidth is 65 MHz (2.540-2.605 GHz) with a 3-dB AR beamwidth of around 180° across the band. Overall antenna volume is 0.475λo× 0.475λo × 0.013λo at 2.5 GHz.

Original languageEnglish
Pages (from-to)1044-1049
Number of pages6
JournalMicrowave and Optical Technology Letters
Volume58
Issue number5
DOIs
Publication statusPublished - 1 May 2016
Externally publishedYes

Keywords

  • circular polarization
  • circularly polarized antenna
  • patch radiator with strips
  • wide beamwidth

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