A koch-shaped log-periodic dipole array (LPDA) antenna for universal ultra-high-frequency (UHF) radio frequency identification (RFID) handheld reader

Heng-Tung Hsu, Ting Jui Huang

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

In this communication, we propose a printed log-periodic dipole array (LPDA) antenna covering the universal ultra-high-frequency (UHF) radio frequency identification (RFID) band of operation. Koch-shaped dipoles together with closely-coupled parasitic elements as directors were utilized for compactness in size and improvement in front-to-back ratio (F/B ratio). The experimental results demonstrate that the proposed antenna features good impedance match, moderate gain, better than 80% total radiation efficiency and excellent front-to-back ratio over the universal UHF RFID band from 840 MHz to 960 MHz. The antenna is well suitable for applications in RFID handheld readers.

Original languageEnglish
Article number6517871
Pages (from-to)4852-4856
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Volume61
Issue number9
DOIs
StatePublished - 1 Jan 2013

Keywords

  • Antenna
  • array
  • dipole
  • log-periodic
  • radio frequency identification (RFID)
  • ultra-high-frequency (UHF)

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