Characterizing and Testing a Fabric Containing Amorphous Glass-Coated Ferromagnetic Microwires for its Magnetic and Electric Shielding Properties in the Frequency Range (1-3) Ghz

Simona Miclăuş 1 , Lucian Barbu-Tudoran 2 , Paul Bechet 1 ,  und Octavian Baltag 3
  • 1 “Nicolae Bălcescu” Land Forces Academy,, Sibiu, Romania
  • 2 National Institute for R&D of Isotopic and Molecular Technologies,, Cluj-Napoca, Romania
  • 3 Terraflux Control,, Iaşi, Romania


By applying a non-standardized methodology and by using electric- and magnetic-field probes of small dimensions (< 1cm), we experimentally characterized the electromagnetic shielding properties of a fabric containing ferromagnetic microwires weaved on a single direction. Electronic microscopy and X-ray spectroscopy revealed the structure, dimensions and chemical elements content of the amorphous magnetic material. Electric shielding factor proved to be very low in the investigated frequency range, but magnetic shielding factor was high, especially when the weaving direction of the magnetic wires corresponded to the polarization direction of the emitting antenna, and showed some resonances. The magnetic shielding efficiency, if checked against an increasing incident magnetic flux density, proved not to change up to 200 nT. The investigated fabric have been previously proved to be very efficient in shielding the field emitted by a mobile phone in its near field, but present results show that near and far field shielding properties are different.

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  • Baltag, O., Cantore, C., Costandache, D., Haras, S., Larin, V., & Torcunov, V. (2000). Study of a texture of an amorphous magnetic material able to screen non-ionizing radiation, in Di Barba, P., & Savini, A. (eds.), Non-linear Electromagnetic Systems, IOS Press, 717-720.

  • Baranov, S.A., Larin, V.S., & Torcunov, A.V. (2017). Technology, Preparation and Properties of the Cast Glass-Coated Magnetic Microwires. Crystals 7, 136.

  • Devkota, J., Colosimo, P., Chen, A., Larin, V. S., Srikanth, H., & Phan, M. H. (2014). Tailoring magnetic and microwave absorption properties of glass-coated soft ferromagnetic amorphous microwires for microwave energy sensing. Journal of Applied Physics 115, 17A525.

  • Liberal, I. (2013). Amorphous Glass-Coated Ferromagnetic Wires in Microwave Engineering, Ph.D. Thesis. Department of Electrical and Electronic Engineering, Public University of Navarra, Department of Electrical and Electronic Engineering, Pamplona, Spain.

  • Makhnovskiy, D. P., & Panina, L. V. (2006). Experimental demonstration of tunable scattering spectra at microwave frequencies in composite media containing CoFeCrSiB glass-coated amorphous ferromagnetic wires and comparison with theory. Physical Review B, Condensed matter 74(6).

  • Miclaus, S., Mihai, G., Aron, A.M., Mitrescu, C., Bechet, P., & Baltag, O. (2017). Shielding efficiency of a fabric based on amorphous glass-covered magnetic microwires to radiation emitted by a mobile phone in 2G and 3G communication technologies. Land Forces Academy Review, vol. XXII, nr. 4 (88), 289-297.

  • Rau, M., Iftemie, A., Baltag, O., & Costandache, D. (2011). The Study of the Electromagnetic Shielding Properties of a Textile Material with Amorphous Microwire. Advances in Electrical and Computer Engineering, 11(1), 17-22.

  • Yong-jiang, D., Jian-Jun, J., Gang, D., Bin, T., Shao-Wei, B., & Hua-Hui, H. (2007). Magnetic and microwave properties of glass-coated amorphous ferromagnetic microwires. Transaction on Nonferrous Metal Society of China, 17, 1352-1357.


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