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Miniaturized Ag Thick Film Microstripline as Novel Biomaterial Moisture Sensor

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In this paper use of a nondestructive, miniaturized Ag thick film microstripline 1 in. × 1 in. sensor for the study of moisture in biomaterials (groundnuts) is suggested. The in-touch overlay (sample in contact with microstripline) method provides ease of loading and unloading of sample. The perturbation obtained in the transmittance and reflectance of thick film microstripline due to the groundnut overlay has been used to obtain the permittivity. The changes in the moisture content in the groundnut produces frequency dependent changes in the characteristics of microstripline. As moisture content increases, microwave dielectric constant and dielectric loss of groundnut increases. For prediction of moisture content a relationship between dielectric properties and bulk density is identified, and a density-independent function is proposed. At different frequencies and moisture contents an explicit calibration equations for moisture prediction are provided.

Document Type: Research Article


Publication date: September 1, 2010

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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