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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Electromagnetic Resonant Transmission through Slits in a Cavity inside Conducting Screen of Finite Thickness

두께가 유한한 도체 스크린 내부 캐비티의 슬릿을 통한 전자파 공진 투과

  • Lee, Jong-Ig (Department of Electronics Engineering, Dongseo University) ;
  • Cho, Young-Ki (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 이종익 (동서대학교 전자공학과) ;
  • 조영기 (경북대학교 전자전기컴퓨터학부)
  • Published : 2010.10.31
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Abstract

In this paper, the problem of electromagnetic transmission via slits in a cavity inside conducting screen of finite thickness is considered for the case that the TE(to the slit axis) polarized plane wave is incident on the slit in conducting screen. Using the method of moments the variations of the transmitted power through the slits are obtained and compared with those computed from an equivalent circuit constructed using an equivalent slit admittance. It is found that the effective slit width of a narrow slit, at resonance, becomes $1/{\pi}$ wavelengths independently of the actual slit width. The transmission resonance phenomena in the proposed geometry are explained in connection with the variations of an equivalent admittance of the slit in the cavity.

본 논문에서는 두께가 유한한 도체 스크린 내부 캐비티의 슬릿을 통한 전자파 투과 문제를 슬릿 축에 대해 TE 편파된 평면파가 도체 스크린의 슬릿에 입사되는 경우에 대해 고려하였다. 모멘트 방법을 이용하여 슬릿을 통해 투과된 전력을 구하고, 슬릿의 등가 어드미턴스로부터 구성된 등가 회로 방법을 이용하여 계산된 것과 비교하였다. 공진조건 하에서 좁은 슬릿의 유효 슬릿 폭은 실제 슬릿 폭에 무관하게 $1/{\pi}$ 파장이 됨이 확인되었다. 제안된 구조에서의 공진 투과 현상을 캐비티 내부 슬릿의 등가 어드미턴스 변화와 관련하여 설명하였다.

Keywords

References

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