Vol. 86

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues

Electromagnetic Shielding Effectiveness of Gypsum-Magnetite Composite at X-Band Frequency

By Mohamad Ashry Jusoh, Kok Yeow You, Rodziah Nazlan, and Fahmiruddin Esa
Progress In Electromagnetics Research Letters, Vol. 86, 21-26, 2019


Rapid development of the electronic industry has increased the frequency of communication devices which lead to higher intensity of electromagnetic (EM) wave production. Too much exposure of EM wave can cause harm to health besides imposing disturbances in performances of other electronic devices. Hence, this research studies the structural and electromagnetic properties of materials that can act as electromagnetic shielding material at x-band frequency. Different compositions of magnetite powder/Fe3O4 (0, 10, 20 and 100 wt.%) were prepared to be dispersed in gypsum powders to form gypsum-magnetite composites. The structural properties of composites were characterized using Scanning Electron Microscopy (SEM) to observe homogeneity of the composites. The X-Ray Diffraction (XRD) was used to determine phase composition of the gypsum-magnetite composites. Scattering parameters of reflection coefficient, S11, and transmission coefficient, S21, were measured using Vector Network Analyzer (VNA). These parameters will be used to calculate the shielding effectiveness (SE) of gypsum-magnetite composite at x-band frequency. The results show that the total SE of the gypsum-magnetite composites were increased by adding magnetite powders.


Mohamad Ashry Jusoh, Kok Yeow You, Rodziah Nazlan, and Fahmiruddin Esa, "Electromagnetic Shielding Effectiveness of Gypsum-Magnetite Composite at X-Band Frequency," Progress In Electromagnetics Research Letters, Vol. 86, 21-26, 2019.


    1. Liu, Y., et al., "Electromagnetic interference shielding and absorption properties of Ti3SiC2/nano Cu/epoxy resin coating," Journal of Alloys and Compounds, Vol. 740, 68-76, 2018.

    2. Chan, Y. L., F. Esa, K. Y. You, M. S. S, M. Z. H. Mayzan, and M. A. Jusoh, "Electromagnetic properties of magnetite/epoxy resin composites at X-band frequency," 2017 Progress In Electromagnetics Research Symposium --- Fall (PIERS --- FALL), Singapore, Singapore, Nov. 19-22, 2017.

    3. Ahmad, S. H., et al., "Magnetic and microwave absorbing properties of magnetite-thermoplastic natural rubber nanocomposites," Journal of Magnetism and Magnetic Materials, Vol. 322, No. 21, 3401-3409, 2010.

    4. Hu, T., et al., "Electromagnetic interference shielding properties of carbonyl iron powder-carbon fiber felt/epoxy resin composites with different layer angle," Materials Letters, Vol. 142, 242-245, 2015.

    5. Al-Saleh, M. H., "Influence of conductive network structure on the EMI shielding and electrical percolation of carbon nanotube/polymer nanocomposites," Synthetic Metals, Vol. 205, 78-84, 2015.

    6. Liu, X., et al., "Fabrication and electromagnetic interference shielding effectiveness of carbon nanotube reinforced carbon fiber/pyrolytic carbon composites," Carbon, Vol. 68, 501-510, 2014.

    7. Liu, X., et al., "Electromagnetic interference shielding effectiveness of titanium carbide sheets," Materials Letters, Vol. 205, 261-263, 2017.