The study aims to identify and compare the attenuation of electromagnetic waves at 1.161 GHz and 2.45 GHz frequencies between uncoated and coated woven fabric samples, wherein the metal-contained yarns were used in a weft direction with an increasing quantity per 10.5 mm long repeat of fabric length. Plain weave fabric samples were made of three different types of metal-containing yarns in the weft direction. The quantity of metal-contained yarns per centimeter was increased by every sample. In addition, samples were coated with polyurethane and graphite layers. The characteristics (thickness and surface density) of fabric samples were determined. The attenuation of electromagnetic (EM) waves was measured and compared for uncoated and coated samples. Two horn antennas and a network analyzer were used to measure at 1.161 GHz and 2.45 GHz, respectively. The graphite coating made the attenuation higher for the samples with a lower content of metal-contained yarns. Still, this improvement was irrelevant for the samples with a more extensive content of metal-contained weft yarns.