The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Flexible Zeroth-Order Resonant(ZOR) Antenna Independent of Curvature Diameter

곡률에 독립적인 플렉서블 기판 위에 설계된 영차 공진 안테나

  • Lim, In-Seop (School of Electrical and Electronics Engineering, Chung-Ang University) ;
  • Chung, Tony J. (School of Electrical and Electronics Engineering, Chung-Ang University) ;
  • Lim, Sung-Joon (School of Electrical and Electronics Engineering, Chung-Ang University)
  • 임인섭 (중앙대학교 전자전기공학부) ;
  • 정진우 (중앙대학교 전자전기공학부) ;
  • 임성준 (중앙대학교 전자전기공학부)
  • Received : 2011.11.02
  • Accepted : 2011.12.05
  • Published : 2012.01.31
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Abstract

In this paper, we propose a flexible zeroth-order resonant(ZOR) antenna. Its zero phase constant ensures that the antenna performance is independent of substrate deformation. A composite right/left-handed transmission line is designed based on coplanar waveguide technology to realize the zeroth-order resonance phenomenon. The CRLH is an implementation of metamaterial(left handed material) which is composed of shunt inductance and series capacitance. In order to yield additional circuital parameter, chip inductor and gap capacitor is added, respectively. The proposed ZOR antenna provides good performances: reasonable bandwidth(6.5 %) and peak gain(0.69~1.39 dBi). Simulated and measured results show that the antenna's resonant frequencies and radiation patterns are almost unchanged at different curvature diameters of 30, 50, 70 mm, as well as for a flat surface.

본 논문에서는 가요성(flexible) 있는 영차 공진 안테나를 제안하였다. 안테나의 성능을 결정하는 본 논문의 위상 상수는 영차 공진일 때 기판의 변형에 독립적이다. Composite right/left-handed(CRLH) 전송 선로를 영차 공진 현상을 실현하기 위해 coplanar waveguide technology(CPW)를 기반으로 구현되었다. CRLH는 병렬 인덕턴스와 직렬 캐패시턴스를 추가함으로써 메타 물질로 구현된다. 추가적인 회로 변수를 만들기 위해 칩 인덕터와 갭 캐패시터가 각각 추가되었다. 제안된 ZOR 안테나는 대역폭 6.5 %와 최대 이득 0.69~1.39 dBi으로 좋은 성능을 보인다. 시뮬레이션과 측정 결과를 통해서 곡면의 지름이 서로 다른 각각 30, 50, 70 mm 뿐만 아니라 평면일 때 공진 주파수와 방사 패턴이 거의 변하지 않았음을 보였다.

Keywords

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