The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Performance Analysis of CATR Reflector Equipped with Modified Asymmetric Triangular Serrations

비대칭 구조를 갖는 변형된 삼각형 서레이션의 CATR 특성 해석

  • Received : 2010.03.09
  • Published : 2010.04.30
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Abstract

The ripple within the quiet zone in the CATR(Compact Antenna Test Range) would be increased due to the diffraction at the edge of the reflector. Therefore, the reflector equipped with the serrations is generally used to reduce the ripple within the quiet zone. In this paper, the modified asymmetric triangular serrations are proposed, and the diffraction of the proposed serrations is analyzed using the Fresnel diffraction formula. The ripple of amplitude and phase between the conventional triangular and the proposed serrations are compared to confirm the ripple of the proposed serrations. As the result of the modulated the reflector size, height of the serrations and numbers of serrations, it is confirmed that the ripple of the proposed serrations is less than the conventional triangular serrations. Accordingly, proposed serrations are expected to reduce the ripple within quiet zone.

CATR(Compact Antenna Test Range)의 반사판 가장자리에서 발생되는 회절 전계는 quiet zone의 리플(ripple)을 증가시키는 원인이 되기 때문에 반사판은 서레이션(serration)을 부착하여 사용하게 된다. 본 논문에서는 삼각형을 비대칭으로 변형시킨 새로운 형태의 서레이션 구조를 제안하였고, 프레넬 회절 식을 사용하여 회절 전계를 해석하였다. 기존 삼각형 서레이션과 제안된 서레이션의 리플 특성을 확인하기 위하여 진폭 및 위상 리플을 비교하였다. 반사판의 크기, 서레이션 높이, 서레이션 개수를 변화시키며 해석한 결과, 제안된 구조의 서레이션에서 기존 삼각형 형태의 서레이션보다 리플이 감소함을 확인하였다. 따라서 본 논문에서 제안된 구조의 서레이션은 quiet zone의 리플을 감소시킬 수 있을 것으로 예상된다.

Keywords

References

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