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has been cited by the following article:

• TITLE: A Broadband Complex Permittivity Probe Using Stepped Coaxial Line

  AUTHORS: Somporn Seewattanapon, Prayoot Akkaraekthalin

  KEYWORDS: Complex Permittivity, Reflection Coefficient, Stepped Coaxial Probe

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.3 No.8, August 2, 2011

  ABSTRACT: This paper proposes the stepped coaxial line sensor using the reflection coefficient in microwave range for complex permittivity measuring. The proposed probe is adapted from the conventional SMA connector which is cheap and easy to fabricate. The analysis model of the probe has been done by using FDTD method with the reference material such as the distilled water. The stepped SMA probe presents the accurate result compared with the convention one. The permittivity values of the concentrated alcohols of 10%, 15% and 20% as DUTs at 24oC in a frequency range of 0.1 GHz to 6 GHz have been measured using the proposed probe. Also, the measurement of salted butter permittivity has been performed. The measured results are more accurate compared with the commercial probe.