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Analysis of Reflectivity and Shielding Effectiveness of Absorbing Material–Conductor Laminate for Electromagnetic Compatibility

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DOI: 10.4236/jemaa.2010.25041    4,725 Downloads   9,403 Views   Citations

ABSTRACT

An absorbing material–conductor laminate is widely used for electromagnetic compatibility of electronic circuits at microwave frequencies. Such a laminate when properly designed will exhibit good results in terms of electromagnetic interference and compatibility. In this paper, microwave absorbing materials like 1) Ca-NiTi hexa ferrite composites (Ca (NiTi)x Fe12-2xO19) for x = 0.4, 2) M-Type Barium ferrites (BaFe12-2xAxCoxO19 for the tetravalent A ions, Ru4+ is chosen), 3) MnZn ferrite-Rubber composites with volume fraction vf = 0.4, 4) Carbonyl-Iron particle composites with volume fraction vf = 40% and conducting materials like copper, stainless steel are considered to form the interface in the laminate. Mathematical formulations are carried out for the estimation of reflectivity and shielding effectiveness of absorbing material–conductor laminate at microwave frequencies Analysis is also carried out for various thicknesses of the microwave absorbing material and conducting material in the laminate. The reflectivity and shielding effectiveness depends not only on the type of the selected material in the laminate, but also their thickness in the laminate and frequency of operation.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

C. Raj, G. Rao, P. Jayasree, B. Srinu and P. Lakshman, "Analysis of Reflectivity and Shielding Effectiveness of Absorbing Material–Conductor Laminate for Electromagnetic Compatibility," Journal of Electromagnetic Analysis and Applications, Vol. 2 No. 5, 2010, pp. 318-323. doi: 10.4236/jemaa.2010.25041.

References

[1] V. P. Kodali, “Engineering Electromagnetic Compatibility, Principles, Measurements and Technologies,” S Chand and Company Ltd., 2000.
[2] R. B. Schulz, V. C. Plantz and D. R. Brush, “Shielding Theory and Practice,” IEEE Transactions on Electromagnetic Compatibility, Vol. 30, No. 3, August 1988, pp 187-201.
[3] Y. B. Feng, T. Qiu, X. Y. Li and C. Y. Shen, “Microwave Absorption Properties of the Carbonyl Iron/ EPDM Radar Absorbing Materials,” Journal of Wuhan University of Technology Materials Science Edition, Vol. 22, No. 2, June 2007, pp. 266-270.
[4] P. Singh, V. K. Babbar, A. Razdan, S. L. Srivastava and T. C. Goel, “Microwave Absorption Studies of Ca–Niti Hexaferrite Composites in X-Band,” Materials Science and Engineering, Vol. 78, No. 2-3, 2000, pp. 70-74.
[5] H.-S. ChO and S.-S. Kim, “M-Hexa ferrites with Planar Magnetic Anisotropy and Their Application to High- Frequency Microwave Absorbers,” IEEE Transactions on Magnetics, Vol. 35, No. 5, September 1999, pp. 3151- 3153.
[6] D. Y. Kim, Y. C. Chung, T. W. Kang and H. C. Kim, “Dependence of Microwave Absorbing Property on Ferrite Volume Fraction in MnZn Ferrite-Rubber Composites,” IEEE Transactions on Magnetics, Vol. 32, No. 2, March 1996, pp. 555-558.
[7] B. S. Zhang, Y. Feng, J. Xiong, Y. Yang and H. X. Lu, “Microwave-Absorbing Properties of De-Aggregated Flake-Shaped Carbonyl-Iron Particle Composites at 2-18 GHz,” IEEE Transactions on Magnetics, Vol. 42, No. 7, July 2006, pp. 1178-1781.

  
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