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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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The Design of X-band Cassegrain Antenna for Spill-over Suppression

Spill-over 억제를 위한 X-band 카세그레인 안테나 설계 연구

  • Lee Woo-Sang (Agency for Defense Development) ;
  • Jang Won (Agency for Defense Development) ;
  • Lee Byoung-Moo (Telecommunication Network Business, Samsung electronics) ;
  • Yang Gi-Joo (Dept. of Information and Communication Engineering, Dongguk University) ;
  • Lee Sang-Heun (Dept. of Electronics Engineering, Yonsei University) ;
  • Yoon Young-Joong (Dept. of Electronics Engineering, Yonsei University)
  • Published : 2006.09.01
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Abstract

In this paper, new structure of the Cassegrain reflector antenna whose spill-over is efficiently reduced by modified reflectors is proposed for high power. It can be achieved by designing the geometry of subreflector in Cassegrain system using two hyperbolic curves in order to be suitable a lager beamwidth of feeding pattern without broadening main reflector. Finally, radiation efficiency and side lobe level of the proposed Cassegrain reflector antenna can be improved respectively 9 %, 10 dB than conventional one.

본 논문에서는 초고출력용 X-band 카세그레인 반사판 안테나 시스템에서 반사판의 표면 형상을 변형시켜 spill-over가 효과적으로 감소하는 현상에 대하여 이론적인 고찰을 수행하였다. 이러한 구조는 이중의 쌍곡면 부 반사판을 적용함으로써 주 반사판의 크기를 확장하지 않고 급전 혼 안테나에서 방사된 전파 패턴의 확장각을 증가시켜 spill-over특성이 감소되도록 설계하였다. 결과적으로 본 논문에서 제안된 카세그레인 반사판 안테나가 기존의 설계 방법에 의한 반사판 안테나에 비해 약 9 %의 효율 향상과 10 dB의 부엽 레벨 감소가 구현됨을 이론적으로 확인하였다.

Keywords

References

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