Disseny i mesura de teixits apantallants / antiradiació electromagnètica per a protecció

In recent years several studies regarding metamaterials have been carried out. The possibility of reaching new properties further from the ones offered by conventional materials has opened new ways of study. Among the different fields of investigation in which metamaterials and frequency selective surfaces are involved, applying them on fabrics and creating wearable structures is one of the newest, and still few investigation has been done on it since, although its potential applications, it is still difficult to reach good results. For this reason, and in order to prove that this is an important field in which very interesting results can be obtained by means of conventional procedures, in this thesis a FSS based on fabric and conductive thread is designed. To do so, the first step is to optimize the geometry using computer simulations until reaching the desired electromagnetic properties. Once done that, the designed unit cell is applied in a larger surface, which is tested and the obtained results compared to the ones given by the simulation. By doing this, it is proved that, although the final crafted surface is not exactly the same that the designed one because of the imperfections inherent in any construction process the properties reached are almost the same, offering similar levels of absorption and a small shift of frequency. Since the surface tested in this thesis is relatively small, testing bigger surfaces in order to better approximate the infinite extension hypothesis and improve the construction process are the logical steps to follow in order to improve a technology which has already been proved to be useful, possible and within reach