Measurement of polarized nano-material (PNM) for microwave applications

Study on a novel polarized nano-material (PNM) textile for microwave application has been carried out in this paper. Based on the PNM textile fabricated by Tsinghua-Foxconn Nanotechnology Center, we set up a waveguide test bed to evaluate different kinds of polarized PNM samples. In this paper, Crossed polarized, horizontal polarized and vertical polarized samples (all in waveguide) have been measured in the proposed test bed respectively. Experimental results show the polarization of the nanotube has dominant effect on the performance. The vertical polarized sample has the best performance in shielding effectiveness, the isolation between the two ports of the transmission waveguide is better than 15 dB in average by using 20 layers of PNM yarns, and the horizontal polarized sample is almost invisible. This experiment gives a much deeper sight on the electromagnetic shielding principle of the nanotube materials, and will advance the application of PNM materials in many fields.