Analysis and Measurement of Permittivity in Composite Materials at Low Frequencies

Bernardo Tellini, Mauro Bologna, Mirko Marracci, Roberto Micheletti

Abstract

This paper focuses on the measurement of the effective permittivity in composite structures. A reconsideration of some concepts related to the measurement of effective permittivity for dielectric media and compositematerials at low frequencies is discussed. In particular, the possibility to measure the average electric displacement and electric field over a region of interest on the basis of the circulation law of the magnetic field by the use of properly shaped Rogowski coils is analyzed. A three-dimensional finite element analysis is carried out to simulate the effective magnetic permeability of a composite materials with the aim to find analogy between the two macroscopic electromagnetic parameters.

Keywords

electrical permittivity, low frequency, metamaterial, magnetic permeability, measurement

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IMEKO-TC4-2014-380.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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