Shielding Effectiveness of Rice Husk and CNT Composites in X-Band Frequency
This paper presents the electromagnetic interference (EMI) shielding effectiveness of rice husk and carbon nanotubes (RHCNTs) composites in the X-band region (8.2-12.4 GHz). The difference weight ratio of carbon nanotubes (CNTs) were mix with the rice husk. The rectangular waveguide technique was used to measure the complex permittivity of the RHCNTs composites materials. The complex permittivity is represented in terms of both the real and imaginary parts of permittivity in X-band frequency. The conductivity of RHCNTs shows increasing when the ratio of CNTs mixture increases. The composites materials were simulated using Computer Simulation Technology (CST) Microwave Studio simulation software. The shielding effectiveness of RHCNTs and pure rice husk was compared. The highest EMI SE of 30 dB is obtained for RHCNTs composites of 10 wt % CNTs with 10mm thickness.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1097164Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2160
 L. Yu, et al., "The microwave absorbing properties of SmCo attached single wall carbon nanotube/epoxy composites," Journal of Alloys and Compounds, vol. 575, pp. 123-127, 2013.
 T. H. Ting, et al., "Optimisation of the electromagnetic matching of manganese dioxide/multi-wall carbon nanotube composites as dielectric microwave-absorbing materials," Journal of Magnetism and Magnetic Materials, vol. 339, pp. 100-105, 2013.
 E. Chojnacki, et al., "Microwave absorption properties of carbon nanotubes dispersed in alumina ceramic," Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 659, pp. 49-54, 2011.
 P. S. a. D. Ba, "Epsimu, a tool for dielectric properties measurement of porous media: application in wet granular materials characterization," Progress In Electromagnetics Research B, vol. Vol. 29, 191-207, 2011.
 M. N. Iqbal, et al., "A Study of the Anechoic Performance of Rice Husk- Based, Geometrically Tapered, Hollow Absorbers," International Journal of Antennas and Propagation, vol. 2014, 2014.
 M. F. B. A. M. Y. S. Lee, E. M. Cheng, W. W. Liu, K. Y. You, M. N. Iqbal, F. H. Wee, S. F. Khor, L. Zahid, and M. F. b. Haji Abd Malek, "Experimental determination of the performance of rice husk-carbon nanotube composites for absorbing microwave signals in the frequency range of 12.4-18 GHz," Progress In Electromagnetics Research, vol. Vol. 140, 795-812, 2013.
 M. F. B. A. M. E. M. Cheng, M. Ahmed, K. Y. You, K. Y. Lee, and H. Nornikman, , "The use of dielectric mixture equations to analyze the dielectric properties of a mixture of rubber tire dust and rice husks in a microwave absorber " Progress In Electromagnetics Research, vol. Vol. 129, pp. 559-578, 2012.
 Agilent_Technical_Overview, "Agilent Technical Overview. Agilent 85071E Materials Measurement Software, ," Agilent literature number 5988-9472EN., 2012.
 Y. Lee, et al., "An experimental thickness of microwave absorber effect absorption in Ku-band frequency," in Wireless Technology and Applications (ISWTA), 2013 IEEE Symposium on, 2013, pp. 172-175.
 D. Micheli, et al., "Optimization of multilayer shields made of composite nanostructured materials," Electromagnetic Compatibility, IEEE Transactions on, vol. 54, pp. 60-69, 2012.
 Z. Liu, et al., "Reflection and absorption contributions to the electromagnetic interference shielding of single-walled carbon nanotube/polyurethane composites," Carbon, vol. 45, pp. 821-827, 2007.
 F. A. M. Z. Z. Awang, N. H. Baba, A. S. Zoolfakar, and R. A. Bakar, "A free-space method for complex permittivity measurement of bulk and thin film dielectrics at microwave frequencies," Progress In Electromagnetics Research B, vol. Vol. 51, 307-328, 2013.
 P. Jayasree, et al., "Analysis of shielding effectiveness of single, double and laminated shields for oblique incidence of EM waves," Progress In Electromagnetics Research B, vol. 22, pp. 187-202, 2010.