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Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies

Bio-composites of oil palm empty fruit bunch (OPEFB) fibres and polycaprolactones (PCL)with a thickness of 1 mm were prepared and characterized. The composites produced from these materials are low in density, inexpensive, environmentally friendly, and possess good dielectric characteristics. The ma...

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Main Authors: Ahmad, Ahmad F., Abbas, Zulkifly, Obaiys, Suzan J., Ibrahim, Norazowa, Hashim, Mansor, Raad, Haider Khaleel
Format: Article
Language:English
Published: Public Library of Science 2015
Online Access:http://psasir.upm.edu.my/id/eprint/46719/1/Theoretical%20and%20numerical%20approaches%20for%20determining%20the%20reflection%20and%20transmission%20coefficients%20of%20OPEFB-PCL%20composites%20at%20x-band%20frequencies_new.pdf
http://psasir.upm.edu.my/id/eprint/46719/
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0140505
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spelling my.upm.eprints.467192022-07-07T04:48:13Z http://psasir.upm.edu.my/id/eprint/46719/ Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies Ahmad, Ahmad F. Abbas, Zulkifly Obaiys, Suzan J. Ibrahim, Norazowa Hashim, Mansor Raad, Haider Khaleel Bio-composites of oil palm empty fruit bunch (OPEFB) fibres and polycaprolactones (PCL)with a thickness of 1 mm were prepared and characterized. The composites produced from these materials are low in density, inexpensive, environmentally friendly, and possess good dielectric characteristics. The magnitudes of the reflection and transmission coefficients of OPEFB fibre-reinforced PCL composites with different percentages of filler were measured using a rectangular waveguide in conjunction with a microwave vector network analyser (VNA) in the X-band frequency range. In contrast to the effective medium theory, which states that polymer-based composites with a high dielectric constant can be obtained by doping a filler with a high dielectric constant into a host material with a low dielectric constant, this paper demonstrates that the use of a low filler percentage (12.2%OPEFB) and a high matrix percentage (87.8%PCL) provides excellent results for the dielectric constant and loss factor, whereas 63.8% filler material with 36.2% host material results in lower values for both the dielectric constant and loss factor. The open-ended probe technique(OEC), connected with the Agilent vector network analyzer (VNA), is used to determine the dielectric properties of the materials under investigation. The comparative approach indicates that the mean relative error of FEM is smaller than that of NRW in terms of the corresponding S21magnitude. The present calculation of the matrix/filler percentages endorses the exact amounts of substrate utilized in various physics applications. Public Library of Science 2015 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/46719/1/Theoretical%20and%20numerical%20approaches%20for%20determining%20the%20reflection%20and%20transmission%20coefficients%20of%20OPEFB-PCL%20composites%20at%20x-band%20frequencies_new.pdf Ahmad, Ahmad F. and Abbas, Zulkifly and Obaiys, Suzan J. and Ibrahim, Norazowa and Hashim, Mansor and Raad, Haider Khaleel (2015) Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies. PLoS ONE, 10 (10). art. no. e0140505. pp. 1-17. ISSN 1932-6203 https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0140505 10.1371/journal.pone.0140505
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Bio-composites of oil palm empty fruit bunch (OPEFB) fibres and polycaprolactones (PCL)with a thickness of 1 mm were prepared and characterized. The composites produced from these materials are low in density, inexpensive, environmentally friendly, and possess good dielectric characteristics. The magnitudes of the reflection and transmission coefficients of OPEFB fibre-reinforced PCL composites with different percentages of filler were measured using a rectangular waveguide in conjunction with a microwave vector network analyser (VNA) in the X-band frequency range. In contrast to the effective medium theory, which states that polymer-based composites with a high dielectric constant can be obtained by doping a filler with a high dielectric constant into a host material with a low dielectric constant, this paper demonstrates that the use of a low filler percentage (12.2%OPEFB) and a high matrix percentage (87.8%PCL) provides excellent results for the dielectric constant and loss factor, whereas 63.8% filler material with 36.2% host material results in lower values for both the dielectric constant and loss factor. The open-ended probe technique(OEC), connected with the Agilent vector network analyzer (VNA), is used to determine the dielectric properties of the materials under investigation. The comparative approach indicates that the mean relative error of FEM is smaller than that of NRW in terms of the corresponding S21magnitude. The present calculation of the matrix/filler percentages endorses the exact amounts of substrate utilized in various physics applications.
format Article
author Ahmad, Ahmad F.
Abbas, Zulkifly
Obaiys, Suzan J.
Ibrahim, Norazowa
Hashim, Mansor
Raad, Haider Khaleel
spellingShingle Ahmad, Ahmad F.
Abbas, Zulkifly
Obaiys, Suzan J.
Ibrahim, Norazowa
Hashim, Mansor
Raad, Haider Khaleel
Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
author_facet Ahmad, Ahmad F.
Abbas, Zulkifly
Obaiys, Suzan J.
Ibrahim, Norazowa
Hashim, Mansor
Raad, Haider Khaleel
author_sort Ahmad, Ahmad F.
title Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
title_short Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
title_full Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
title_fullStr Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
title_full_unstemmed Theoretical and numerical approaches for determining the reflection and transmission coefficients of OPEFB-PCL composites at X-band frequencies
title_sort theoretical and numerical approaches for determining the reflection and transmission coefficients of opefb-pcl composites at x-band frequencies
publisher Public Library of Science
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/46719/1/Theoretical%20and%20numerical%20approaches%20for%20determining%20the%20reflection%20and%20transmission%20coefficients%20of%20OPEFB-PCL%20composites%20at%20x-band%20frequencies_new.pdf
http://psasir.upm.edu.my/id/eprint/46719/
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0140505
_version_ 1738511944655044608
score 13.211869

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