Experimental technique for high-frequency conductivity measurement. Issue 5 (2nd September 2019)

• Record Type: Journal Article
• Authors: Marák, Károly; Bilicz, Sándor; Pávó, József
• Is Part Of: Compel. Volume 38:Issue 5(2019)
• Page Start: 1711
• Page End: 1722
• Publication Date: 2019-09-02
• Subjects: Carbon fiber composites -- Composite material -- Conductivity measurement -- Material parameters -- Micro-Doppler effect; Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-12-2018-0502
• Languages: English
• ISSNs: 0332-1649

Abstract

Abstract : 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 high-frequency 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 micro-Doppler effect is proposed for the purpose of the measurement of material parameters.