Design of an annular-ring microstrip antenna for circular polarization

Jeen Sheen Row, Kuang Woel Lin

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A new circular-polarization (CP) design of an annular-ring microstrip antenna operating at the fundamental TM11 mode is presented. The CP radiation of the proposed design is achieved by connecting an L-shaped strip to two orthogonal sides of the inner boundary of the annular-ring patch. A prototype of the proposed antenna fabricated on a foam substrate has been implemented and studied. The results show that good CP-radiation performances are obtained and the 3-dB axial ratio is about 2%. Good agreement is also obtained between the measured and simulated results.

Original languageEnglish
Pages (from-to)156-157
Number of pages2
JournalMicrowave and Optical Technology Letters
Issue number2
Publication statusPublished - 2004 Jul 20

All Science Journal Classification (ASJC) codes

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

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