A free-space transmission method has been used for reliable shielding effectiveness
measurement of the easily available textile materials. Textiles with three different yarn
densities were studied for their shielding effectiveness with the help of a vector network
analyzer and laboratory calibrated two X-band horn antennas. The expressions of
uncertainty estimation have been derived in accordance with the present free-space
measurement setup for the calculated SE values. The measurements have shown that an
electromagnetic energy can be maximum shielded up to 16.24 dB with measurement uncertainty
less than 0.21 dB in 8.2 to 12.4 GHz range by a 160.85 μm textile. Thus,
a thin textile with a high density can have higher shielding and this property mainly
depends on its intrinsic structure, frequency range and thickness. This study promises the
potential applications of such materials as a very cost effective shielding material at
microwave frequencies with some modifications.