A mixing formula accounting for inversion of matrix structure
Source abstract
Abstract
Known mixing models are analyzed with the aim to retrieve permeability of metal inclusions from the measured constitutive parameters of a binary composite. The application-oriented models are interpreted in terms of inclusion shape-factor and percolation threshold, which are two measurement-fitted parameters. A model that accounts for the inversion of the Maxwell Garnett matrix structure is proposed. The structure inversion point is close to the percolation threshold, and the inversion takes place within a transition filling range that is a third fitting parameter. The proposed model is compared with the effective medium model in terms of the complex susceptibility calculated as the function of filling and of frequency and in terms of Bergman-Milton shape-factor distribution charts. The model validity is illustrated by treatment of the measured microwave constitutive parameters of a composite filled with carbonyl nickel.
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Research context
OpenAlex topics: Microwave and Dielectric Measurement Techniques · Advanced Antenna and Metasurface Technologies · Microwave Engineering and Waveguides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences 1 , Izhorskaya 13, 125412 Moscow, Russia
Institute of Physics, Academy of Sciences of the Czech Republic 2 , Na Slovance 2, 18221 Prague, Czech Republic
Funding
Russian Foundation for Basic Research
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