Statistical description of inhomogeneous samples by scanning microwave microscopy

Monti, Tamara, Udoudo, O.B., Sperin, Kevin A., Dodds, Chris, Kingman, S.W. and Jackson, Timothy J. (2017) Statistical description of inhomogeneous samples by scanning microwave microscopy. IEEE Transactions on Microwave Theory and Techniques, 65 (6). pp. 2162-2170. ISSN 0018-9480

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A quantitative analysis of the dielectric properties of a multiphase sample using a scanning microwave microscope (SMM) is proposed. The method is demonstrated using inhomogeneous samples composed of a resin containing micrometric inclusions of a known ceramic material. The SMM suitable for this task employs relatively large tips (tens of micrometers in diameter). Additionally, in order to make the instrument more suitable for high-throughput analysis, an original design for rapid tip changes is implemented. Single-point measurements of dielectric constant at random locations on the sample were performed, leading to histograms of dielectric constant values. These are related to the dielectric constants of the two phases using Maxwell–Garnett effective medium theory, taking into account the volume-of-interaction in the sample beneath the tip.

Item Type: Article
Keywords: Dielectric constant, dielectric materials, Maxwell–Garnett approximation, microwave measurements, near-field measurements, nonhomogeneous media, scanning microwave microscope (SMM), statistical distributions
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
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Depositing User: Eprints, Support
Date Deposited: 27 Jan 2017 09:44
Last Modified: 04 May 2020 18:48

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