Broadband circularly polarized microstrip antenna for RFID reader applications

Yan Shan Boo, Nasimuddin, Z. N. Chen, A. Alphones

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

14 Citations (Scopus)


A broadband single-feed compact circularly polarized stacked microstrip antenna for radio frequency identification (RFID) reader applications is proposed and investigated. The proposed antenna achieved a gain of more than 5.0 dBic, impedance bandwidth with VSWR less than 2 and a wide 3-dB axial-ratio (AR) bandwidth of more than 12% over ultra-high frequency (UHF) band (840 - 940 MHz). The overall antenna size is 0.48λo x 0.48λo x 0.0984λo at 900 MHz. The proposed antenna is attractive for RFID reader applications which require compact size and good circular polarization operation.

Original languageEnglish
Title of host publicationAsia Pacific Microwave Conference 2009
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Print)9781424428021
Publication statusPublished - 2009
Externally publishedYes
EventAsia Pacific Microwave Conference 2009, APMC 2009 - Singapore, Singapore
Duration: 7 Dec 200910 Dec 2009


OtherAsia Pacific Microwave Conference 2009, APMC 2009


  • Circular polarization
  • Microstrip antenna
  • RFID
  • UHF


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