A New Technique to Design Circularly Polarized Microstrip Antenna by Fractal Defected Ground Structure

K. Wei, J. Y. Li, L. Wang, R. Xu, Z. J. Xing

Research output: Contribution to journalArticlepeer-review

149 Scopus citations

Abstract

A new technique to design single-feed circularly polarized (CP) microstrip antenna is proposed. The CP radiation is obtained by adjusting the dimension of the etched fractal defected ground structure (FDGS) in the ground plane. Parameter studies of the FDGS are given to illustrate the way to achieve CP radiation. The CP microstrip antennas with the second and third iterative FDGS are fabricated and measured. The measured 10-dB return-loss bandwidth of the CP microstrip antenna is about 30 MHz (1.558 to 1.588 GHz), while its 3-dB axial-ratio bandwidth is 6 MHz (1.572 to 1.578 GHz). The gain across the CP band is between 1.7 and 2.2 dBic.

Original languageEnglish
Article number7915707
Pages (from-to)3721-3725
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Volume65
Issue number7
DOIs
StatePublished - Jul 2017

Keywords

  • Circular polarization
  • defected ground structure (DGS)
  • fractal structure
  • microstrip antenna

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