Electromagnetic absorber materia, method for the production thereof and method for the production of shielding devices thereof

摘要

The invention relates to a method for effectively decreasing electromagnetic radiation by means of active absorbing material in a broad frequency band, preferably from 100 MHz-10 GHz, wherein said material combines the desired shielding properties with the heat insulating properties of a porous material in addition to providing a favourable ratio between density and resistance. The inventive method is characterised by an absorber granulate which consists of a highly porous glass and/or ceramic granulate which is coated or filled with ferrite and/or an electrically conductive material.