Prefabricated device for eliminating or reducing reflected signals from electromagnetic wave i.e. radar wave, has three dimensional randomly formed grid intermediate layer absorbing partially defused electromagnetic wave to be reflected

摘要

The device has three dimensional randomly formed grid intermediate layer absorbing partially defused electromagnetic wave i.e. radar wave to be reflected. The grid intermediate layer consists of steel or electrically conductive material, where the layer is designed in various shapes selected from diamond-shape, rectangular shape, polygonal shape and round-mesh shape. A crumple randomly formed grid is arranged within a constructional part, and a reinforcing layer is arranged within a grid structure that is included in a matrix made up of concrete.