Experimental technique for high-frequency conductivity measurement

• Károly Marák ^[1] ; Sándor Bilicz ^[1] ; Jozsef Pávo ^[1]
  1. [1] Budapest University of Technology and Economics

     Budapest University of Technology and Economics

     Hungría

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 38, Nº 5, 2019, págs. 1711-1722
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose – The purpose of this study is to introduce a novel method for the measurement of electromagnetic material parameters.

    Design/methodology/approach – The main idea behind the approach is the fact that for slabs with elongated shapes, the intensity of the backscattered field and the electromagnetic resonance frequency corresponding to the length of the sample are dependent on the conductivity of the sample’s material.

    Findings – It is shown that for a known scattered field and resonance frequency, it is possible to formulate an inverse problem as to the calculation of the conductivity of the sample’s material at the considered frequencies. To investigate the applicability of the method, demonstrative experiments are performed during which the micro-Doppler effect is used to increase the measurement accuracy. The idea is extended to the case of anisotropic samples, with slight modifications proposed to the experimental setup in the case of significant anisotropy in the investigated material.

    Practical implications – The measurement method may prove useful for the investigation of the highfrequency conductive properties of certain materials of interest.

    Originality/value – To the best of the authors’ knowledge, this is the first time the use of the microDoppler effect is proposed for the purpose of the measurement of material parameters.