Fabric Model Validation And Analysis Of Electromagnetic Shielding

According to the market the most basic structure characteristics of common radiation proof fabric and the fabric is divided into two types of research. The first is the grid model, another is perforation model. If the fabric holes evenly, so it is suitable for mesh models.The grid model, the need to measure a given frequency samples of the unit length reactor, unit length resistance, diameter, etc. And calculate the fabric permeability, resistance and dielectric constants and other parameters. According to the formula to calculate fabric mesh electromagnetic shielding effectiveness. This article has tested the electromagnetic field shielding effectiveness of same fabric through the SN/T2161-2008reflectoscope reflector, and obtains the experimental result. Test results and the comparison of model results can be found:results from the two methods are the same. This paper analyzes the effect of shielding effectiveness of factors in the model, factors is yarn distance.Yam diameter, the alternating-current resistance and reactance of unit length.this factors. These factors are bigger the SE of fabric is weaker.Fabric coated fabrics suitable for holes model. In the perforation model, through studies to the experiment of test specimen obtains the perforation area size and perforation size of fabric, and perforation integer in fabric unit area. This article finds the shielding effectiveness of fabrics under parameters and compared the results and test results found the two calculation methods the same result. The shield factor of influence model is the fabric area, the cell size and perforation area. If the fabric has the same size, hole and hole size larger, lower the shielding effectiveness of fabrics.Radiation properties of fabrics and finished garments are different, because the fabric is the plane, but clothing three-dimensional. According to the similarity between the conductive fiber and metal, simplifies the ideal anti-radiation clothing as the tunnel model.This article suspends the radius of the skirt, Skirts both inside and outside of the dielectric constant, conductivities, magnetic conductivity and frequency according to the skirt, relatively complex permittivity and other parameters, can calculate to obtain the SE of clothing. Conclusion:from the lower part of the skirt into the electromagnetic wave shielding effect is very small and negligible, so protective clothing the best little open slit, collar cuffs should be as small as possible, clothing type design should rely more on onesies or tight-fitting protective clothing, and so on. Thus carries on a better shield to the electromagnetic wave.