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Effectiveness of Shielding Electromagnetic Radiation, and Assumptions for Designing the Multi-layer Structures of Textile Shielding Materials

Research and development

Authors:

  • Brzeziński Stefan
    Department of Non-conventional Techniques and Textiles, Textile Research Institute, Łódź, Poland
  • Rybicki Tomasz
    Institute of Automatic Control, Faculty of Electrical, Electronic, Computer and Control Engineering, Technical University of Lodz, Łódź, Poland
  • Malinowska Grażyna
    Department of Non-conventional Techniques and Textiles, Textile Research Institute, Łódź, Poland
  • Karbownik Iwona (j/w)
  • Rybicki Edward
    Institute of Architecture of Textile, Technical University of Lodz, Łódź, Poland
  • Szugajew Lech
    Radio-electronic Fighting and Microwave Technique, Research Laboratory of Commanding Systems, Military Institute of Technical Armament, Zielonka near Warsaw, Poland

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Abstract:

In many cases, to obtain the required extent of protection against electromagnetic radiation (EMR) emitted by operating electrical and electronic devices, it is not enough to use only shielding materials that non-transmit the radiation as a results of its reflection, but it is indispensable to use shields (materials) possessing the capability to reflect and absorb EMR at the same time. Depending on their practical use, such materials should be characterised by a high EMR absorption coefficient, even twice as high as their reflection coefficient within as wide a frequency band as possible. This paper presents assumptions for designing multi-layer textile-polymeric materials, the dominating feature of which that increases the shielding effectiveness consists in absorbing EMR as a result of so-called multiple internal reflection. Methods for testing the coefficients of reflection and transmission as well as the preliminary assessment of the test results concerning the EMR shielding materials are also presented.

Tags: electromagnetic radiation, attenuation, reflection, internal reflections, shielding effectiveness, multi-layer textile materials.

Citation: Brzeziński T., Rybicki T., Malinowska G., Karbownik I., Rybicki E., Lech Szugajew L.; Effectiveness of Shielding Electromagnetic Radiation, and Assumptions for Designing the Multi-layer Structures of Textile Shielding Materials. FIBRES & TEXTILES in Eastern Europe, January/March 2009, Vol. 17, No. 1 (72) pp. 60-65.

Published in issue no 1 (72) / 2009, pages 60–65.

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