Journal of electromagnetic engineering and science

  • 제6권1호
  • /
  • Pages.36-46
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  • 2006
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지

A Two-Element Circularly-Polarized Antenna Array for UHF-Band RFID Reader Applications

  • Park Joung-Min (School of Electrical and Computer Engineering, Chungbuk University) ;
  • Kim Yun-Mi (School of Electrical and Computer Engineering, Chungbuk University) ;
  • Ahn Bierng-Chearl (School of Electrical and Computer Engineering, Chungbuk University) ;
  • Park Chan-Sik (School of Electrical and Computer Engineering, Chungbuk University) ;
  • Cha Eun-Jong (School of Medicine, Chungbuk University)
  • 발행 : 2006.03.01
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초록

In this paper, we present a two-element circularly-polarized antenna array for UHF-band RFID reader applications. The antenna element in the array is a comer-truncated rectangular patch placed on a thick plastic-foam dielectric. The patch is fed on one of its edges by a microstrip line printed on a separate thin substrate. The array antenna is fed by a microstrip power divider. Parametric studies on the patch are carried out, from which an optimum design of a single antenna element is derived. The element spacing and the feed network of the array are investigated. A commercial electromagnetic software is employed in the analysis and design of the antenna. The designed array is fabricated and tested. Measurements show good performance characteristics of the fabricated antenna: a 11.2-dBi gain, a reflection coefficient of - 14 dB, an axial ratio less than 3 dB over 3-dB beamwidths of 40 and 60 degrees on two principal planes.

키워드

참고문헌

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