Materials that absorb near-field electromagnetic waves

Abstract

The invention relates to a near-field electromagnetic wave absorbing material comprising at least one plastic film and two linearly scratched thin metal sheets, each sheet having a large number of linearly scratched, discontinuous, parallel, linearly scratched marks of unequal width and spacing in many directions, A linearly scratched thin metal film has a surface resistance ranging from 150 to 300 Ω / Ω, and another linearly scratched thin metal film has a surface resistance ranging from 10 to 50 Ω / Ω.