Compact dual-band printed quadrifilar antennas for UHF RFID/GPS operations

Kyoung Sub Oh, Wang Ik Son, Sung Yong Cha, Moon Que Lee, Jong Won Yu

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


This letter presents a simple and innovative method for designing and optimizing two circularly polarized printed quadrifilar antennas (PQAs). The PQAs are operated at UHF RFID (902-908 MHz) and GPS (1575 MHz) and intended for use at a portable terminal. This new antenna system comprises two PQAs concentrically arranged, but electrically isolated. Each PQA comprises four inverted-F monopoles arranged orthogonally and excited with a phase difference of 90°.

Original languageEnglish
Article number5975195
Pages (from-to)804-807
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2011


  • Circular polarization
  • Global Positioning System (GPS)
  • dual-band antenna
  • printed quadrifilar antenna (PQA)
  • ultrahigh frequency radio frequency identification (UHF RFID)


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