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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Incoherent Inverse Scattering of 3-Dimensional Underground Cavity in Lossy Medium

손실 매질내에 있는 3차원 지하공동의 Incoherent 역산란

  • 홍성용 (충남대학교 전파공학과) ;
  • 강진섭 (한국표준과학연구원 전자기표준부)
  • Published : 1999.06.01
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Abstract

When the time-harmonic plane wave is incident upon a high-contrast spherical cavity in a lossy medium, the incoherent shadow intensity pattern is acquired by averaging out the multi-frequency intensities of the co-polarized total electric field calculated at the measurement plane perpendicular to the propagating direction of the incident wave in the forward direction. In the spherical rotational measurement configuration, an incoherent imaging of the spherical cavity is obtained via the back-projections of the incoherent shadow intensity pattern. This imaging method is validated by imaging an air sphere in the lossy medium of ${\epsilon}_r$ = 2 and $\sigma$ = 0.001, 0.003 S/m and the conditions for obtaining better images are investigated.

시간조화 평면파가 손실 매질내에 있는 high-contrast 구형 공동에 입사되었을 때 순방향에서 입사파 진행방향에 대해 수직인 측정면에서 계산된 입사파 분극방향(co-polarized) 총전계 전력을 주파수 평균하여 incoherent shadow 전계 전력패턴을 얻었다. 공동의 incoherent 영상은 구좌표 회전측정구조에서 얻은 incoherent shadow 전계 전력패턴을 역투시하여 얻었다. 비유전율이 2이고 도전율이 0.001, 0.003S/m인 손실매질내에 있는 공기로 채워진 구형 공동의 영상재현으로 이 영상재현법의 타당성을 보였으며, 보다 좋은 영상을 얻기 위한 조건들을 조사했다.

Keywords

References

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