A novel broadband patch antenna for universal UHF RFID tags

Jun Zh Huang, Peng H. Yang, Weng Cho Chew, Terry Tao Ye

Research output: Contribution to journalArticlepeer-review


A compact broadband patch antenna is proposed in this paper for global ultra-high-frequency (UHF) RF identification (RFID) applications. The antenna is composed of four synchronous shorted patches that resonate at four different frequencies, broadening its impedance bandwidth. A central loop is incorporated to feed the four patches simultaneously, which provides the required input reactance for matching to the chip as well. Since the current of neighboring patch is vertical to each other that they can radiate well without canceling each other, the gain is stable over the whole frequency band. Prototype is fabricated and tested, which shows that the impedance bandwidth can cover the whole UHF RFID band (840 MHz - 960 MHz), and the read range is over 3 meters when EIRP is set to 30 dBm at the reader.

Original languageEnglish (US)
Pages (from-to)2653-2657
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number12
StatePublished - Dec 2010
Externally publishedYes


  • RF identification (RFID)
  • broadband antenna
  • compact antenna
  • low-profile antenna
  • patch antenna
  • tag antenna

ASJC Scopus subject areas

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


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