2016
DOI: 10.3390/s16070967
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Comparison of Metal-Backed Free-Space and Open-Ended Coaxial Probe Techniques for the Dielectric Characterization of Aeronautical Composites

Abstract: The trend in the last few decades is that current unmanned aerial vehicles are completely made of composite materials rather than metallic, such as carbon-fiber or fiberglass composites. From the electromagnetic point of view, this fact forces engineers and scientists to assess how these materials may affect their radar response or their electronics in terms of electromagnetic compatibility. In order to evaluate this, electromagnetic characterization of different composite materials has become a need. Several … Show more

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Cited by 19 publications
(11 citation statements)
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“…This contribution extends the SAR-based imaging techniques presented in [21][22][23] to provide a better recovery of geometry and constitutive parameters, making a more efficient use of the imaging information. More precisely, the proposed methodology takes advantage of the reflections at the interfaces between different media to obtain an estimate of the permittivity and the conductivity, avoiding the need of a reference target or a background medium.…”
Section: Of 15mentioning
confidence: 94%
See 1 more Smart Citation
“…This contribution extends the SAR-based imaging techniques presented in [21][22][23] to provide a better recovery of geometry and constitutive parameters, making a more efficient use of the imaging information. More precisely, the proposed methodology takes advantage of the reflections at the interfaces between different media to obtain an estimate of the permittivity and the conductivity, avoiding the need of a reference target or a background medium.…”
Section: Of 15mentioning
confidence: 94%
“…The theoretical fundament is the different velocity of the electromagnetic waves when passing through different media, so that the reflectivity of the imaged targets is displaced backwards with respect to their expected position. In order to detect this shifting, a reference background is needed (the human body surface in the case of [21], a reference metallic plate in [22,23]).…”
Section: Of 15mentioning
confidence: 99%
“…The main techniques to characterize dielectric materials are based on free space, transmission lines, coaxial probe, parallel plate, and resonators [27,28,29,30]. One of the most popular technique to measure the complex dielectric permittivity of solid and liquid materials is the coaxial probe method [31,32]. This electromagnetic characterization technique is non-destructive and allows to carry out fast broadband measurements of biological substances [33,34].…”
Section: Electromagnetic Characterization Of the Materials Involvementioning
confidence: 99%
“…During the method process development, it appears that the discontinuities' admittances and the transfer impedance can be removed. The transfer impedance gives crucial information on the insulator's state, as presented in the literature [11,[19][20][21]. The principle of concentrated elements, applied with two different thicknesses of identical material, is a new approach to characterize materials.…”
Section: Introductionmentioning
confidence: 99%