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Electromagnetic Wave Shielding Effectiveness Measurement Method of EMP Protection Facility

EMP 방호시설의 전자파 차폐효과 측정 방법

  • Seo, Manjung (EMP Assessment Team, Korea Testing & Research Institute) ;
  • Chi, Seongwon (EMP Assessment Team, Korea Testing & Research Institute) ;
  • Kim, Youngjin (EMP Assessment Team, Korea Testing & Research Institute) ;
  • Park, Woochul (EMP Assessment Team, Korea Testing & Research Institute) ;
  • Kang, Hojae (Department of Electrical Engineering, Inha University) ;
  • Huh, Changsu (Department of Electrical Engineering, Inha University)
  • 서만중 (한국화학융합시험연구원 EMP 평가팀) ;
  • 지성원 (한국화학융합시험연구원 EMP 평가팀) ;
  • 김영진 (한국화학융합시험연구원 EMP 평가팀) ;
  • 박우철 (한국화학융합시험연구원 EMP 평가팀) ;
  • 강호재 (인하대학교 전기공학과) ;
  • 허창수 (인하대학교 전기공학과)
  • Received : 2013.07.18
  • Accepted : 2014.03.26
  • Published : 2014.05.31

Abstract

EMP(Electromagnetic Pulse) protection facility was evaluated according to standard of shielding effectiveness. To comply with the standard, transmitting antenna was placed on outside of protection facility and receiving antenna was placed on inside of protection facility. However, measurement is impossible that place does not have enough space between protection facility and external concrete structure. In this paper, we performed a various of tests that put transmitting antenna inside the EMP protection facility in order to find out test method for measuring the shielding effectiveness of electromagnetic wave. Transmitting antenna was placed on inside of the EMP protection facility for measuring the shielding effectiveness to compare and analyze the impact of the position regarding to the transmitting and receiving antenna. As a result of test, in case that transmitting antenna was placed on inside of the EMP protection facility, it was found that test frequency range 10 kHz~1 GHz were occurred overall average difference of ${\pm}4$ dB level.

현재 EMP(Electromagnetic Pulse) 방호시설의 차폐효과 성능 평가를 위해 적용하고 있는 규격들에서는 통상적으로 송신안테나를 시설 외부에 배치하고, 수신안테나를 시설 내부에 배치하여 차폐효과(Shielding Effectiveness: SE)를 측정하도록 규정하고 있다. 하지만 차폐효과 측정 시 방호시설과 외부 콘크리트 구조물 사이에 충분한 공간을 확보하지 못하는 경우, 차폐효과 측정이 불가능하게 된다. 본 논문에서는 송신안테나를 EMP 방호시설 내부에 배치하여 전자파의 차폐효과를 측정할 수 있는 시험방법을 찾기 위해 다양한 시험을 수행하였다. 차폐효과 측정 시 송수신 안테나의 위치에 따른 영향을 비교 분석하기 위해 송신안테나를 EMP 방호시설 내부에 배치하여 차폐효과를 측정한 결과, 외부에 배치했을 때보다 시험주파수 영역 10 kHz~1 GHz에서 전체적으로 평균 ${\pm}4$ dB 수준의 차이가 발생하는 것으로 나타났다.

Keywords

References

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