2000
DOI: 10.1016/s0892-6875(00)00144-8
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Low frequency microwave technique for on-line measurement of moisture

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Cited by 18 publications
(9 citation statements)
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“…Another area in which microwaves have been used in coal research is the on-line measurements of moisture in coals employing the frequencies of 2.45 GHz (Cutmore et al, 2000) and 1 GHz (Ponte et al, 1996). In these techniques, microwave horns are used to transmit and receive microwaves through the coal sample.…”
Section: Measuring Moisture Content By Microwavesmentioning
confidence: 99%
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“…Another area in which microwaves have been used in coal research is the on-line measurements of moisture in coals employing the frequencies of 2.45 GHz (Cutmore et al, 2000) and 1 GHz (Ponte et al, 1996). In these techniques, microwave horns are used to transmit and receive microwaves through the coal sample.…”
Section: Measuring Moisture Content By Microwavesmentioning
confidence: 99%
“…Both phase shift and attenuation are measured by microwave network analyzer. However, experiments show that phase shift provides a better linear correlation with the moisture content (Ponte et al, 1996;Cutmore et al, 2000). Since attenuation is due to absorption of microwaves primarily by moisture present, this technique can also result in sufficient dewatering of the coals.…”
Section: Measuring Moisture Content By Microwavesmentioning
confidence: 99%
“…São derivadas da energia elétrica, podendo ser refletidas por um espelho simples como uma folha metálica, refratadas em uma interface dielé-trica e ser focalizadas por refletores parabólicos ou antenas (Haque, 1999).…”
Section: Introductionunclassified
“…De acordo com a capacidade de dissipação da energia das microondas, os materiais se classificam em condutores, que refletem toda a radiação que incide sobre os mesmos (metais), isolantes, que são transparentes às microondas, ou seja, não interage com essas radiações, e dielétricos, que absorvem a energia das microondas incidentes sobre os mesmos (Haque, 1999).…”
Section: Introductionunclassified
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