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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Edge-Effect Reduction Technique to Compute the Backscattering from Randomly Rough Conducting Surfaces

거친 도체 표면 후방 산란 계산을 위한 모서리 효과 저감 기법

  • Hwang, Ji-Hwan (Department of Electronic Information and Communication Engineering, Hongik University) ;
  • Kweon, Soon-Koo (Department of Electronic Information and Communication Engineering, Hongik University) ;
  • Oh, Yisok (Department of Electronic Information and Communication Engineering, Hongik University)
  • 황지환 (홍익대학교 전자정보통신공학과) ;
  • 권순구 (홍익대학교 전자정보통신공학과) ;
  • 오이석 (홍익대학교 전자정보통신공학과)
  • Received : 2013.12.20
  • Accepted : 2014.02.24
  • Published : 2014.05.31
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Abstract

An improved numerical scattering model with the 2-dimensional moment method including roof-top basis and a modified window-function to reduce edge-effect is presented in this study. The roof-top basis function is used to depict randomly positioned surface currents and increase an efficiency of the moment method. To reduce the edge-effect which occurs at the end of numerically generated surfaces, an enhanced window-function which is weighted by incident angle variable is proposed. To validate an proposed 2-dimensional scattering model and numerical analysis techniques for randomly rough surfaces, computational results are compared and analyzed to SPM(Small Perturbation Model) as well.

본 연구에서는 roof-top 기저함수와 모서리 효과(edge-effect)를 저감시키기 위해 개선된 윈도우 함수를 적용한 2차원 모멘트법의 수치 해석 기법과 그 결과들을 제시한다. 모멘트법을 이용한 2차원 수치 산란 모델은 roof-top 기저함수를 적용하여 임의 방향 표면 전류 성분 표현과 계산 효율을 높였으며, 수치적으로 생성된 표면 양 끝단의 모서리에서 발생되는 산란 특성을 제거하기 위해 입사각별 가중치를 둔 개선된 윈도우 함수를 제안한다. 또한, 거칠기가 있는 표면의 산란 특성 분석을 위한 개선된 2차원 수치 해석 기법의 정확도를 검증하기 위해서 SPM(Small Perturbation Model)의 계산결과와 비교/분석하였다.

Keywords

References

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