Electromagnetic wave absorbing material, electronic device having the radio wave absorbing material, automatic toll collection system, and in-vehicle radar device

摘要

PROBLEM TO BE SOLVED: To provide a radio wave absorber having higher radio wave absorption properties for high frequency electromagnetic waves, in the near field and far field.SOLUTION: A radio wave absorber contains carbon nano-tubes containing one kind or more selected from a group consisting of group II elements, group IV-X elements, and group XIII metal elements, and silicon rubber, and an electronic apparatus, and the like, including this radio wave absorber. The radio wave absorber may contain one kind or more selected from a group consisting of aluminum hydroxide, magnesium hydroxide, barium sulphate, calcium carbonate, talc, and silica, in addition to carbon nano-tubes.SELECTED DRAWING: None