New method for measuring properties of nonhomogeneous materials by a two-polarization forward-scattering measurement

Toropainen, A.P.

doi:10.1109/22.260690

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…Sometimes a number of frequency components are 20 or more that is needed to improve averaging process. The basic drawback of coherent illumination is the parasitic depolarization effect leading to splitting radiated wave on the two components: copolarized and cross-polarized [3]. As a result, additional losses of microwave energy provide contribution to the measured attenuation degrading accuracy of moisture determination since losses are function Figure 18.…”

Section: Microwave Experimentsmentioning

confidence: 99%

“…In the case of nonhomogeneous medium such as granular materials with arbitrary particle shaping some additional factors must be taken into consideration: the shape of particles, frequency range, polarization effects as well as coherency properties of probing signal. Various models have been introduced for predicting both forward and backward scattering effects in dense random media [2,3]. On the other hand theoretical and experimental studies these materials are made difficult due to the ambiguity associated with the above mentioned factors.…”

Section: Introductionmentioning

confidence: 99%

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Noise Versus Coherency in Mm-Wave and Microwave Scattering From Nonhomogeneous Materials

Kapilevich¹,

Litvak

2011

PIER B

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Section: Microwave Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Noise Versus Coherency in Mm-Wave and Microwave Scattering From Nonhomogeneous Materials

Kapilevich¹,

Litvak

2011

PIER B

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“…The same concept of measurement can be applied in industrial dynamic situations in which the material flows through a pipe or moves on a conveyor belt. Accurate measurements of τ are obtained if edge diffraction, internal reflections and scattering effects are minimized [14][15][16].…”

Section: Wave-materials Interactionmentioning

confidence: 99%

Nondestructive microwave characterization for determining the bulk density and moisture content of shelled corn

Trabelsi¹,

Kraszewski²,

Nelson³

1998

Meas. Sci. Technol.

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A method based on nondestructive microwave characterization is used for simultaneous determination of the bulk density and moisture content of shelled corn. This method can be applied regardless of the measurement technique and thus considerably simplifies the calibration procedure. Calibration equations, both for the bulk density and for the moisture content, are given, together with the standard error of performance (SEP) at several frequencies in the range 11-18 GHz and three temperatures, 14, 24 and 34 • C. The bulk density, ranging from 695 to 830 kg m −3 , can be determined with SEP in the range 11-15 kg m −3 . Neither the sample moisture content nor its temperature are required in order to determine the bulk density. The moisture content ranging from 9% to 19% on a wet basis, can be determined at each temperature without knowledge of the bulk density with SEP of less than 0.5% moisture content. Results of an error analysis of the measurements show that about half of the total uncertainties in bulk density and moisture content can be considered systematic errors and thus they are correctable.

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“…Both applications require a lightweight, compact, power-efficient, and robust polarimeter; most importantly, both require the measurement of chirality in the presence of significant amounts of DLS (Atkins and Barron, 1970;Mackintosh et al, 1989;Toropainen, 1993;Marienko and Savenkov, 1994;Barry et al, 1997;Delplancke et al, 1997;Vitkin and Hoskinson, 2000;Chaikovskaya, 2002). In fact, the non-invasive humanglucose monitoring problem is actually more difficult; it also requires low-cost manufacturability, specificity for glucose, and approximately 90% accuracy.…”

Section: Fig 2 (Left)mentioning

confidence: 98%

Astrobiological Polarimeter

et al. 2008

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Chirality is an excellent indicator of life, but naturally occurring astrobiological (as well as terrestrial) samples nearly always exhibit massive depolarizing light scattering, which renders conventional polarimeters useless. For astrobiological applications, we instead consider a novel polarimeter originally developed for non-invasive human-glucose measurement. It involves deliberately rotating in time the plane of polarization of a linearly polarized beam and detecting the shift in the plane of the rotating linearly polarized component of the transmitted light from a chiral sample relative to the input polarization plane. We find that this polarimeter can operate in 3 orders of magnitude more depolarizing scattering than conventional polarimeters. Furthermore, it can also be designed to be lightweight, compact, and energy efficient.

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New method for measuring properties of nonhomogeneous materials by a two-polarization forward-scattering measurement

Cited by 8 publications

References 7 publications

Noise Versus Coherency in Mm-Wave and Microwave Scattering From Nonhomogeneous Materials

Noise Versus Coherency in Mm-Wave and Microwave Scattering From Nonhomogeneous Materials

Nondestructive microwave characterization for determining the bulk density and moisture content of shelled corn

Astrobiological Polarimeter

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