Circularly polarized annual ring antenna perturbed by asymmetrical defected ground structures for improved gain

S. Pyo, M. J. Lee, H. S. Lee, S. H. Kim, Young Sik Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)


A novel perturbing methodology using asymmetrical defected ground structure (DGS) is proposed for a circularly polarized (CP) annual ring antenna with improved antenna gain. By loading two fairs of half dumbbell-shaped DGS at four diagonal corners of the ring radiator, the orthogonally polarized modes are controlled. Simulated and measured results show that the proposed antenna demonstrates good CP radiations at the resonant frequency.

Original languageEnglish
Pages (from-to)2994-2996
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number12
Publication statusPublished - 2011 Dec 1



  • antenna gain
  • circular polarization
  • defected ground structure
  • microstrip annual ring antenna

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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