Circularly-polarized reconfigurable microstrip antenna

C. H. Lai, T. Y. Han, Tsair Rong Chen

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


This paper presents a new design for a circularly-polarized (CP) microstrip patch antenna with switchable polarization sense. The antenna has a circular radiating patch and it is excited by a microstrip feed line through the coupling of a full-wavelength annular-ring slot in the ground plane. First, it is found that the antenna polarization can be switched between vertical and horizontal polarizations when two PIN diodes are used to reconfigure the coupling slot and the open stub of the feed line, respectively. Such a linearly-polarized reconfigurable microstrip antenna can be converted to a switchable CP antenna by embedding a cross slot with unequal lengths into the radiating patch. Details of the designs are described, and both simulated and measured results are presented.

Original languageEnglish
Pages (from-to)195-201
Number of pages7
JournalJournal of Electromagnetic Waves and Applications
Issue number2-3
Publication statusPublished - 2009 Feb 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

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