A Study of the Anechoic Performance of Rice Husk-Based, Geometrically Tapered, Hollow Absorbers
Joint Authors
Iqbal, Muhammad Nadeem
Malek, Mohd. Fareq
Lee, Yeng Seng
Zahid, Liyana
Mezan, Muhammad Shafiq
Source
International Journal of Antennas and Propagation
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-01-05
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Although solid, geometrically tapered microwave absorbers are preferred due to their better performance, they are bulky and must have a thickness on the order of λ or more.
The goal of this study was to design lightweight absorbers that can reduce the electromagnetic reflections to less than −10 dB.
We used a very simple approach; two waste materials, that is, rice husks and tire dust in powder form, were used to fabricate two independent samples.
We measured and used their dielectric properties to determine and compare the propagation constants and quarter-wave thickness.
The quarter-wave thickness for the tire dust was 3 mm less than that of the rice husk material, but we preferred the rice-husk material.
This preference was based on the fact that our goal was to achieve minimum backward reflections, and the rice-husk material, with its low dielectric constant, high loss factor, large attenuation per unit length, and ease of fabrication, provided a better opportunity to achieve that goal.
The performance of the absorbers was found to be better (lower) than −20 dB, and comparison of the results proved that the hollow design with 58% less weight was a good alternative to the use of solid absorbers.
American Psychological Association (APA)
Iqbal, Muhammad Nadeem& Malek, Mohd. Fareq& Lee, Yeng Seng& Zahid, Liyana& Mezan, Muhammad Shafiq. 2014. A Study of the Anechoic Performance of Rice Husk-Based, Geometrically Tapered, Hollow Absorbers. International Journal of Antennas and Propagation،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1036095
Modern Language Association (MLA)
Iqbal, Muhammad Nadeem…[et al.]. A Study of the Anechoic Performance of Rice Husk-Based, Geometrically Tapered, Hollow Absorbers. International Journal of Antennas and Propagation No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1036095
American Medical Association (AMA)
Iqbal, Muhammad Nadeem& Malek, Mohd. Fareq& Lee, Yeng Seng& Zahid, Liyana& Mezan, Muhammad Shafiq. A Study of the Anechoic Performance of Rice Husk-Based, Geometrically Tapered, Hollow Absorbers. International Journal of Antennas and Propagation. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1036095
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1036095