Absorber for electromagnetic waves in e.g. field of telecommunication engineering, has resistance layers adhered with preset electrical surface resistance, and insulator layers formed as spacers and arranged before/behind resistance layers

摘要

The absorber (F') has composites (A-E) arranged behind each other. Resistance layers are adhered with a preset electrical surface resistance. Insulator layers (3, 6, 9, 12, 15) formed as spacers and from dielectric i.e. polystyrene foam, are arranged before or behind the resistance layers. The resistance layers include base layers (2, 5, 8, 11, 14) and conductive layers (1, 4, 7, 10, 13) adhered with electrical surface resistance. The conductive layers are formed by a coating of the base layers. A reflector layer (R') reflects electromagnetic waves (EM-W) according to flow of the composites. The conductive layers are formed from silver-zeolite, polyaniline-zeolite, polyaniline powder, metal powder, tin-zeolite, zinc oxide, carbon fibers, ferrite powder or graphite, and binding agents such as polyvinyl alcohol, polyacrylate, polystyrene, polyethylene terephthalate (PET)-hydrolyzate or acrylic resin.