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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Comparisons of RCS Characteristic of Spherical Frequency Selective Surfaces with FSS Element Arrangement

FSS 단위셀 배열구조에 따른 구형 주파수 선택 구조의 RCS 특성비교

  • Hong, Ic-Pyo (Dept. of Information & Communication Engineering, Kongju National University) ;
  • Lee, In-Gon (Dept. of Information & Communication Engineering, Kongju National University)
  • Received : 2012.09.05
  • Accepted : 2012.11.19
  • Published : 2012.12.31
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Abstract

In this paper, we analyzed the electromagnetic characteristics of the spherical frequency selective surface with different arrangement of crossed dipole slot elements for reducing the RCS(radar cross section). The three dimensional MOM(method of moment) with RWG basis is used to analyze the proposed structure. To reduce the simulation time, we applied the BiCGSTab(Biconjugate Gradient Stabilized) algorithm as an iterative method and presented the comparison results with Mie's theoretical results for PEC sphere to show the validity of this paper. From the simulation results, the different arrangement of elements array showed the difference RCS that cannot be negligible. The arrangement method of element in frequency selective surface will be one of variables for the design of curved frequency selective structures.

본 논문에서는 레이더 단면적(RCS, Radar Cross Section)을 감소시키기 위한 전자파 구조로서 십자형 다이폴 슬롯을 원소로 가지며 다른 배열형태 구조를 갖는 구형 주파수 선택적 표면(FSS, Frequency Selective Surface) 구조의 전파특성을 해석하였다. 유한크기와 곡면형상을 갖는 구형 주파수 선택적 표면 구조의 주파수 특성을 해석하기 위해 RWG 함수를 적용한 3차원 모멘트법을 사용하였으며 반복법 중 하나인 BiCGSTab(Biconjugate Gradient Stabilized) 알고리즘을 적용하여 해석시간의 효율성을 개선하였다. 1m 직경을 갖는 완전도체(PEC, Perfect electric conductor)의 구에 대한 이론적 해석결과인 Mie의 RCS 특성과 비교 검증하여 제안한 해석 알고리즘의 유효함을 입증하였다. 구형 주파수 선택적 표면 구조에서 슬롯 성분의 배열 방법에 따른 RCS 변화를 관찰하여 비교하였으며, 곡면형상의 주파수 선택구조 설계시 배열의 방법도 RCS 특성에 중요한 변수가 될 수 있음을 확인하였다.

Keywords

References

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