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Measurements of shielding effectiveness of textile materials containing metal by the free-space transmission technique with data processing in the time domain

Dvurechenskaya N., Bajurko P. R., Zieliński R. J., Yashchyshyn Y.

Metrology and Measurement Systems

2013

Vol. 20, nr 2

217--228

The results of shielding effectiveness (SE) measurements of textile materials containing metal by the free-space transmission technique (FSTT) in the 1-26.5 GHz frequency range are presented in the paper. It is shown that experimental data processing using time-domain gating (TDG) makes it possible to effectively remove diffracted and reflected components from the desired signal. The comparison with the results obtained by other techniques, namely modified FSTT with TDG and coaxial line probe technique (ASTM D4935-99) is given. The comparison shows that the proposed technique gives more reasonable results while the measurement set-up is simpler in realization.

Measurement of Special Shielding Materials at S and C Band Using Improved Free-Space Transmission Technique

Dvurechenskaya N., Zieliński R. J.

International Journal of Electronics and Telecommunications

2011

Vol. 57, No. 3

329-334

In this paper we discuss state of the art in the field of shielding materials investigation. Two types of newly manufactured shielding materials (nonwoven and fabric) were measured using improved free-space transmission technique at 2-5 GHz depending on electromagnetic wave (EM) polarization and antenna to specimen distance. Results of shielding effectiveness (SE) evaluation based on measured complex transmission coefficients (S21) were presented and compared with SE measured using coaxial transmission line technique. Also results of surface resistance measurements with the four-probe technique for the test materials are shown.