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UA Study on the Polarization Selective Antenna for UHF RFID System

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2010, 15(7), pp.67-74
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

이사원 1 송우영 2

1한국폴리텍 청주캠퍼스
2청주대학교

Accredited

ABSTRACT

TIn this paper, it is designed the polarization selective antenna for UHF RFID system. The proposed antenna is consist of microstrip patch antenna with dual feeding and two SPDT switches and a SP4T switch and 3dB hybrid coupler. Through control of voltage of switches, the proposed reader antenna can select horizontally linear polarization, vertically linear polarization, left-hand circular polarization (LHCP) and right hand circular polarization (RHCP). The proposed reader antenna satisfied 2:1 VSWR at 902MHz ~ 928MHz. and it has under 3dB AR(axial ratio). Peak gain of antenna is 7.71dBi, 7.55dBi with linear polarization and 7.31dBic, 7.81dBic with circular polarization at x-y plane. Also Axial ratio of antenna is 2.01 ~ 2.83dB and 2.02 ~ 2.60dB respectively. It is satisfied 3dB axial ratio.

Citation status

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