Microwave absorption performance enhancement of corn husk-based microwave absorber
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Microwave absorption performance enhancement of corn husk-based microwave absorber Soumya Sundar Pattanayak1,* 1 2
, S. H. Laskar1, and Swagatadeb Sahoo2
Electronics & Instrumentation Engineering Department, National Institute of Technology Silchar, Silchar, India Electronics & Communication Engineering Department, National Institute of Technology Jamshedpur, Jamshedpur, India
Received: 13 August 2020
ABSTRACT
Accepted: 13 November 2020
This paper presents corn husk-based microwave absorber along with the enhancement of microwave absorption performance by adding a different percentage of charcoal in the frequency range of 1–20 GHz. The open-ended coaxial probe method is used to measure the S11 parameter, and also dielectric properties of the samples. The computer simulation technology microwave studio (CST MWS) is used to design the proposed microwave absorber. The result shows that the sample with the utmost charcoal content (4.44 wt%) poses the best return loss value of - 50.2696 dB at 19.221 GHz frequency.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction In the present era, the increasing use of electronics and digital devices makes the electromagnetic (EM) radiation ubiquitous in our everyday life. The widespread exposure of the EM radiation produces long-term acute effect in human health cause of current concern to the modern society. Endeavors to minimize the EM interference using absorbing and/or shielding mechanisms were noticed in the past few decades. The evolution of microwave-absorbing material (MAM) with a thin thickness, lightweight, wide bandwidth, and strong absorption is considered as one of the best alternatives to eradicate EM interference. Microwave-absorbing materials (MAMs) generally used an effective microwave energy-dissipating element without any secondary interference [1]. Recently, extensive research works are performed on carbon, metallic
particles, and conducting polymers [2–4]. Chemicalbased and ferrites are the conventional materials in the fabrication of microwave absorber (MA) over the few decades. Heavy expenses in fabrication procedure and deficiency of bio-degradability impose restraint in ample use of these materials in the fabrication of MA. Also, these materials are health hazardous due to their harmful emission under high temperatures. The ferrite materials are cost-effective and have large densities that make them alternative materials. In general, carbon as a basic element is normally used to design MA. Due to semiconducting nature, a very small amount of charge flows through carbon and shows favorable electrical characteristics. Agricultural residue-based absorber is a center field of attraction for developing cost-effective and eco-friendly alternative MAMs [5–9].
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https://doi.org/10.1007/s10854-020-04888-1
J Mater Sci: Mater Electron
The investigation reports the absorption performance of the corn husk-based single-layer microwave absorber at very low thickn
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