The Journal of Engineering Research (공학논문집)

Engineering Research Center Paichai University (배재대학교 공학연구소)
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Analysis of Radiation Characteristics of the Shaped Cassegrainian Antenna

수정곡면 카세그레인 안테나의 복사특성 해석

  • Ryu, Hwang (Division of Computer, Electronic, and Information Engineering, Paichai University) ;
  • Joo, Gi-Ho (Division of Computer, Electronic, and Information Engineering, Paichai University)
  • 류황 (배재대학교 컴퓨터전자정보통신공학부) ;
  • 주기호 (배재대학교 컴퓨터전자정보통신공학부)
  • Published : 1998.12.30
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Abstract

The purpose of this study is to analyze the radiation characteristics of the shaped Cassegrainian antenna. Radiation pattern of the sub-reflector is calculated by GTD (Geometrical Theory of Diffraction) The complete radiation patterns are obtained by summing the reflect field from the surface and the diffracted fields from the edge. The first and the second derivative on the sub-reflector are calculated by the local interpolation technique. The Radiation characteristics of the main-reflector are obtained by integrating the surface current density, which is derived from PO approximation. The radiation integral is expanded by the Jacobi-Bessel series for the purpose of reducing the computation time.

이 논문에서는 수정곡면 카세그레인 안테나의 복사특성을 해석하였다. 부반사판의 복사특성은 GTD를 이용하여 계산되었고, 완전한 복사패턴은 반사파와 회절파의 합으로 표현되었다. 부반사판의 해석을 위해서 부반사판의 1,2차 미분값을 국지보간법을 이용하여 구했다. 주반사판의 복사특성 해석은 PO를 사용하여 유도된 표면전류밀도를 적분하므로써 수행되었다. Jacobi-Bessel 급수를 이용하여 적분식을 변형시켜서 계산 시간을 단축시켰다.

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