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0000-00-00
Enhanced Microwave Absorption of Rice Husk-Based Pyramidal Microwave Absorber (PMa ) with Lossy Base Layer
By
Yeng Seng Lee,

    Dr. Yeng Seng Lee

    Department of Electronic Engineering Technology, Faculty of Engineering Technology

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

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Fwen Hoon Wee,

    Dr. Fwen Hoon Wee

    School of Computer and Communication Engineering

    University Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Ping Jack Soh,

    Dr. Ping Jack Soh

    Dept of Electrical Engineering

    KU Leuven

    Belgium

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You Kok Yeow,

    Dr. You Kok Yeow

    Faculty of Electrical Engineering

    University Teknologi Malaysia

    Malaysia

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Chia Yew Lee,

    Dr. Chia Yew Lee

    Faculty of Bioscience and Medical Engineering

    Universiti Teknologi Malaysia

    Malaysia

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Hong Seng Gan,

    Dr. Hong Seng Gan

    Medical Engineering Technology Section British Malaysian Institute

    Universiti Kuala Lumpur

    Malaysia

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Mohamed Fareq Abdul Malek,

    Dr. Mohamed Fareq Abdul Malek

    Faculty of Engineering and Information Sciences

    University of Wollongong in Dubai

    United Arab Emirates

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Zahriladha Zakaria

    Dr. Zahriladha Zakaria

    Faculty of Electronic and Computer Technology and Engineering

    Universiti Teknikal Malaysia Melaka (UTeM)

    Malaysia

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Abstract
The size of pyramidal microwave absorbers (PMA) is one of the main considerations for their selection for use in anechoic or electromagnetic compatibility (EMC) chambers. In this work, a new type of PMA is introduced, with rice husk (RH) as its filler. Meanwhile, a lossy base layer is also introduced in the PMA using a combined RH and carbon nanotube (CNT) composite. To do so, the dielectric properties of the RH-CNT composite are first investigated from 2 to 18 GHz by using a dielectric probe. Next, the microwave absorption properties of the PMA were investigated in terms of different height of the pyramidal structure and base layer. The free space method was used to measure the microwave absorption of PMA at normal incidence. Results indicated good microwave absorption characteristics in the 2 GHz to 6 GHz with a height of 11.5 cm the PMA structure, and 1 cm thickness of the base layer. The lossy base layer is found to increase the bandwidth of the absorber and improve the microwave absorption of PMA in the lower GHz frequencies. Further investigations concluded that the microwave absorption performance of the PMA is dependent on its dielectric properties, size and base layer. The designed PMA with base layer has great potential in anechoic chamber with its broadband microwave absorption from 2 GHz to 18 GHz.
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Citation
Yeng Seng Lee, Fwen Hoon Wee, Ping Jack Soh, You Kok Yeow, Chia Yew Lee, Hong Seng Gan, Mohamed Fareq Abdul Malek, and Zahriladha Zakaria, "Enhanced Microwave Absorption of Rice Husk-Based Pyramidal Microwave Absorber (PMa ) with Lossy Base Layer," , Vol. , , .
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