Diffraction from Frequency Selective Surfaces for secure building applications

Frequency Selective Surface (FSS) can be used to control mobile phone signal propagation both in and out of buildings. When an FSS is to be designed to be attached to a building surface, such as a window, there are two main aspects to affect its performance. The common research interest is to design FSS that can increase the specular attenuation for a range of angles and polarizations. For secure buildings applications the level of attenuation needed to stop signals propagating into a room requires the need to investigate the level of diffraction scattering from the FSS. This paper introduces research into the diffraction issues associated with FSS for secure building applications.