Friday, 28 October 2011

ELECTRICAL CONDUCTIVITY AND ELECTROMAG-NETIC SHIELDING EFFECTIVENESS OF SILICONE RUBBER FILLED WITH FERRITE AND GRAPHITE POWDERS

Progress In Electromagnetics Research M, Vol. 21, 93-104, 2011


C. Morari*, I. Balan, J. Pintea, E. Chitanu, and I. Iordache

*National Institute for Research and Development in Electrical
Engineering ICPE-CA, Splaiul Unirii, No. 313, Bucharest 030138,
Romania



Abstract   There is increasing interest in electromagnetic interference
(EMI) shielding due to the serious electromagnetic environment
pollution caused by the continuously increased use of the electrical
products and electronic devices. Electrical conductivity and EMI
shielding effectiveness (SE) of composite materials made from silicone
rubber with carbon powder and ferrite powder have been studied
in microwaves and terahertz frequency ranges and the results are
presented in this paper. In microwaves range, samples with higher
electrical conductivity show a small variation of shielding performance
with frequency, whereas the performance of samples with lower
conductivity falls away with increasing frequency. It is shown that
the variation of attenuation with frequency relates to the conductivity
of the material

... The samples were then studied in the 0.06–3THz (2–100cm−1) frequency range using the TeraView TPS spectra 3000terahertz transmission spectrometer. First, a reference spectrum was acquired with no sample mounted on the sample holder. ...


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