Compare of shielding effectiveness for building materials

During the 1990s, most electromagnetic field research focused on extremely low frequency exposures stemming from conventional power sources, such as power lines, electrical substations, or home appliances. Now, in the age of mobile telephones, wireless routers, and portable GPS devices (all known sources of EMF radiation), concerns regarding a possible connection between EMFs and adverse health effects still persist. This paper deals with compare the shielding effectiveness of various building materials. Measurements were performed into non-reflection chamber for frequency - 1,5 GHz 2 GHz, 2,5 GHz, 3 GHz and 3,5 GHz. Measurements were performed according to the IEEE Standard, Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures. Measurements were performed in the non-reflection chamber in order to avoid the exterior influence.