The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Shielding Effectiveness Analysis of the Digital Module Storage Cabinet for Nuclear Power Plants According to the Internal Structure and the Angle of EM wave Incidence

내부구조와 전파 입사각에 따른 원전용 디지털 모듈 보관 캐비닛의 차폐효과 분석

  • 윤상운 (홍익대학교 전자전기공학과) ;
  • 장도영 (홍익대학교 전자전기공학과) ;
  • 추호성 (홍익대학교 전자전기공학과) ;
  • 김영미 (한국원자력안전기술원) ;
  • 이준용 (홍익대학교 컴퓨터공학과)
  • Received : 2020.12.31
  • Accepted : 2021.02.17
  • Published : 2021.02.28
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Abstract

In this paper, the cabinet shielding effectiveness (SE) including digital modules for nuclear power plants is analyzed depending on the internal structure and electromagnetic (EM) wave incidence angle. To analyze the SE, the cabinet and modules are modeled using the FEKO EM simulation tool. The SE is then obtained by comparing the electric field with and without the cabinet. In addition, the cabinet SE is observed by changing various conditions such as the spacing of each digital module, incidence angle, and the polarization of the EM wave at the 2.4 G[Hz frequency. To verify the results, the dipole antenna for SE measurements is fabricated, and the SE is measured in a semi-anechoic chamber. The result demonstrates that the SE by the cabinet structure can be expected to be higher when the polarization of the incident EM wave is horizontal to the ground and the distance between the digital modules is wide.

본 논문에서는 원자력 발전소에서 사용되는 디지털 모듈을 포함하는 캐비닛의 전자파 차폐효과를 외부 전파원과 내부 디지털 모듈의 배치 변화에 따라 분석하였다. 차폐효과를 분석하기 위해서 FEKO EM 시뮬레이션 툴을 사용하여 캐비닛과 모듈을 모델링하였으며, 캐비닛의 유무에 따른 전계값을 통해서 차폐효과 분포를 도출하였다. 차폐효과는 2.4 GHz 주파수에서 캐비닛에 대한 입사각, 편파 그리고 모듈의 간격에 따라 관찰하였다. 결과 검증을 위해 차폐효과 측정용 다이폴안테나를 설계 및 제작하고 이를 활용해 캐비닛의 차폐효과를 측정하였다. 결과에 따르면 캐비닛 구조는 입사되는 전파의 편파가 지면에 수평하고, 디지털 모듈간의 간격이 넓을 때 더 높은 차폐효과를 기대 할 수 있는 것으로 분석되었다.

Keywords

References

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