A switchable circular polarization microstrip antenna using a varactor diode

Tae Hak Lee, Jung Woo Baik, Junho Choi, Young Sik Kim

Research output: Contribution to journalArticlepeer-review


In this letter a circular polarization microstrip antenna with switchable polarization is proposed. The switchable polarization sense characteristic is realized via a shunt connected varactor tuning diode. The appropriate capacitance of the diode at the reverse bias voltage can alter two circular polarizations, as the tuning diode, which is located near the rectangular slot in the circular patch, is utilized in a perturbation element. The switchable polarization is analyzed using the equivalent circuit model representing the resonances of each orthogonal mode. Simulation, calculated, and measured results agree well.

Original languageEnglish
Pages (from-to)3597-3600
Number of pages4
JournalIEICE Transactions on Communications
Issue number11
Publication statusPublished - 2012 Nov


  • Circular polarization
  • Reconfigurable antenna
  • Varactor tuning diode

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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