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

  • 제20권12호
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  • Pages.1233-1242
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  • 2009
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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인공 자기 도체를 이용한 기지국 안테나의 방사 특성 개선 및 두께 감소

The Radiation Characteristics Improvement and Thickness Reduction of Base Station Antenna with Artificial Magnetic Conductor

  • 손철홍 (연세대학교 전기전자공학과) ;
  • 안지환 (연세대학교 전기전자공학과) ;
  • 장기훈 (연세대학교 전기전자공학과) ;
  • 윤지환 (연세대학교 전기전자공학과) ;
  • 윤영중 (연세대학교 전기전자공학과)
  • Son, Cheol-Hong (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Ahn, Ji-Hwan (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Chang, Ki-Hun (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Yoon, Ji-Hwan (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Yoon, Young-Joong (Department of Electrical & Electronic Engineering, Yonsei University)
  • 발행 : 2009.12.31
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초록

본 논문에서는 도체 판 대신 인공 자기 도체를 반사판으로 이용하여 방사 특성이 개선되고 두께를 줄인 PCS용 기지국 안테나 구조를 제안하였다. 반사판으로 도체 판을 사용하는 기존 기지국 안테나의 경우, 도체 판 끝부분에서 기생 방사가 발생하고 이는 안테나의 후방사를 증가시켜 기지국 안테나의 방사 특성을 악화시킨다. 하지만 인공 자기 도체를 사용하면 표면에서의 높은 임피던스에 의해 표면파가 억압되어 후방사를 크게 줄일 수 있다. 그리고 부엽 특성도 개선되어 서비스 지역이 겹치는 문제를 막을 수 있다. 뿐만 아니라, 인공 자기 도체 표면에서의 $0^{\circ}$ 반사 위상에 의해 기지국 안테나의 두께를 또한 줄일 수 있다.

In this paper, a Base Station Antenna(BSA) utilizing Artificial Magnetic Conductor(AMC) as reflector instead of common conductive plate to improve radiation characteristics and achieve low-profile is proposed. In the case of the conventional BSA on conductive surface which acts as a reflector, a secondary radiation is caused at the corner of the conductive surface, and it increases the back-lobe of the antenna, resulting in deteriorating the radiation characteristic of the conventional BSA. However, using the AMC, the back-lobe of the BSA can be largely reduced by the surface wave suppression. And the Side-Lobe Level(SLL) is also improved, resulting in preventing the service area overlapped. Furthermore, due to the $0^{\circ}$ reflection phase on AMC, the profile of the BSA can be also reduced.

키워드

참고문헌

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