Simple Technique for Measurement of Complex Permittivity and Detection of Small Permittivity Change Using Partially Open Cavity

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Park, Sangbok;Chung, Young-Seek;Cheon, Changyul

  • 투고 : 2013.02.12
  • 심사 : 2013.08.09
  • 발행 : 2014.01.01

초록

This letter presents a measurement methodology of the complex permittivity of liquid using a partially open cavity in narrow band. The partially open cavity (POC) can measure dielectric small changes caused by the temperature variation of the liquid inside the cavity as well. Using the resonance frequency and unloaded quality factor of the proposed POC, the complex permittivity is evaluated. The apertures on the walls of the cavity are designed to circulate the liquid inside to outside of the POC and located at the corner area of the cavity to minimize the disturbance of field distribution at the dominant mode. The results measured by the proposed POC were compared with those by the conventional open-ended probe and Cole-Cole equation. The POC showed better performance in measuring small dielectric constant changes than the open-ended probe.

키워드

Cavity resonator;Permittivity;Dielectric material;Dielectric liquid

참고문헌

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피인용 문헌

  1. 1. Monostatic radiometry system for temperature measurement during RF hyperthermia treatment vol.59, pp.9, 2017, doi:10.5370/JEET.2014.9.1.268
  2. 2. Method for Measurement of Complex Relative Permittivity of Semi-Solid Materials Using Novel Cavity Resonator Design vol.25, pp.8, 2014, doi:10.5370/JEET.2014.9.1.268

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea(NRF)