Journal of Electrical and Computer Engineering (Jan 2017)

Compact Design of Circularly Polarized Antenna with Vertical Slotted Ground for RFID Reader Application

  • Hesheng Cheng,
  • Jin Zhang,
  • Hexia Cheng,
  • Qunli Zhao

DOI
https://doi.org/10.1155/2017/1936849
Journal volume & issue
Vol. 2017

Abstract

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A novel compact circular polarization (CP) microstrip antenna is proposed for UHF ultrahigh frequency (UHF) radio frequency identification (RFID) reader applications. The proposed antenna is composed of a corner truncated square-ring radiating patch on a substrate and a vertical slotted ground surrounding four sides of the antenna. A new feeding scheme is designed from flexible impedance matching techniques. The impedance bandwidths for S11<-10 dB and 3 dB axial ratio (AR) bandwidth are 12.1% (794.5–896.5 MHz) and 2.5% (833.5–854.5 MHz), respectively.