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Radiation Efficiency Improvement of RFID Tag Antenna for Metallic Objects Printed on Lossy Substrate

손실 기판을 이용한 금속 부착형 RFID 태그 안테나의 복사 효율 향상

  • Son, Hae-Won (Division of Electronics & Information Engineering, Chonbuk National University) ;
  • Choi, Won-Kyu (Electronics and Telecommunications Research Institute) ;
  • Choi, Gil-Young (Electronics and Telecommunications Research Institute)
  • 손해원 (전북대학교 전자정보공학부) ;
  • 최원규 (한국전자통신연구원) ;
  • 최길영 (한국전자통신연구원)
  • Published : 2008.11.30

Abstract

In this paper, we propose a new antenna design method for RFID tass on metallic surfaces using a low-cost, high-loss substrate such as FR4. The proposed design method highly reduces the substrate loss due to its dielectric loss, and so improves the radiation efficiency of the tag antenna more than double compared with a conventional PIFA(planar inverted-F antenna). The equivalent circuit model of the antenna according to the proposed method was established and its characteristics were analyzed systematically in this paper. The excellency of the proposed design method was verified by the fabrication and measurement of a prototype antenna.

본 논문에서는 FR4와 같은 저가의 고손실 기판을 이용하여 금속 부착형 태그 안테나를 설계하는 새로운 방법을 제안한다. 제안한 설계 방법은 유전 손실(dielectric loss)에 따른 기판 손실(substrate loss)을 크게 감소시킴으로써, 태그 안테나의 복사 효율(radiation efficiency)을 기존의 평면 역 F 안테나(planar inverted-F antenna: PIFA)에 비하여 2배 이상 향상시킨다. 본 논문에서는 제안한 방법에 따른 안테나의 등가 회로 모델을 정립하고 이를 체계적으로 분석하였으며, 시제품을 제작 및 측정하여 제안한 방법의 우수성을 입증하였다.

Keywords

References

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