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Electromagnetic shielding of cement-graphite powder between 100 to 2000 MHz

Yee, See Khee and Mohd Jenu, Mohd Zarar (2015) Electromagnetic shielding of cement-graphite powder between 100 to 2000 MHz. In: International Conference on Electrical and Electronic Engineering 2015 (IC3E 2015), 10-11 August 2015 , Melaka, Malaysia.

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Abstract

Electromagnetic interference (EMI) issue is of concern as it may cause the malfunction of other electrical or electronic devices. Extra protection can be provided not only to the equipment but also to the human inside a building if the shielding capability can be embedded directly into the building material. The inherent shielding of the cement powder is not adequate to eliminate the incoming electromagnetic (EM) field efficiently (less than 2dB from the result of this work). Hence this work is carried out to improve the shielding effectiveness (SE) of cement powder by mixing graphite fine powder as a conductive filler into the cement powder. The increment in the loss factor reflected that the addition of the conductive filler has increased the conductivity of the mixture. The addition of 30 percent of graphite into the cement powder is able to produce 110dB of shielding at 900MHz at 10cm.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: shielding effectiveness; reflection loss; absorption loss; dielectric constant; loss factor; graphite fine powder; cement powder
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions: Faculty of Electrical and Electronic Engineering > Department of Communication Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 29 Oct 2015 06:36
Last Modified: 29 Oct 2015 06:36
URI: http://eprints.uthm.edu.my/id/eprint/7147
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