Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Complex Permittivity of Dry Sand Measured by an Open-Ended Coaxial Probe

개방단말 동축선 프로브로 측정된 마른 모래의 복소 유전율

  • Shin, Hyun (Dept. of Radio Sciences and Eng., Korea Univ.) ;
  • Kim, Se-Yun (Imaging Media Research Center, Korea Institute of Science and Technology) ;
  • Kim, Young-Sik (School of Electrical Eng., Korea Univ.)
  • 신현 (고려대학교 전파공학과) ;
  • 김세윤 (한국과학기술연구원 영상미디어연구센터) ;
  • 김영식 (고려대학교 전기.전자.전파공학부)
  • Published : 2000.05.01
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Abstract

Complex permittivity of dry sand is measured by using an open-ended coaxial probe, which was self-designed and manufactured. As a simple calibration scheme of the probe, the phase difference between the measured and the calculated reflection coefficients of pure water is subtracted from the phase of the measured reflection coefficient for dry sand. And then the complex permittivity of dry sand is reconstructed by applying its measured reflection coefficient into an improved imaginary transmission-line model. The accuracy of our measurement scheme is verified by showing that its reconstructed complex permittivity approaches the precise value of dry sand.

자체 설계 및 제작된 개방단말 동축선 프로브를 이용하여 마른 모래의 복소 유전율을 측정하였다. 프로브의 간단한 교정 방안으로 순수한 물에 대해 측정된 반사계수와 수치계산한 반사계수간의 위상차를 모래에 대해 측정된 반사계수의 위상에 뺐다. 그 다음 마른 모래에 대해 측정된 반사계수를 개선된 가상의 동축선 모델에 대입하여 복소 유전율을 환산하였다. 동일한 마른 모래에 대해 측정된 정확한 측정자료와 비교함으로써 본 측정방법의 정확성을 입증하였다.

Keywords

References

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