▎ 摘　　要

NOVELTY - The radio wave absorber has a radio wave absorbing layer (1), and a reinforcement layer (2) arranged on the radio wave 10-incident surface side of the radio wave absorbing layer. The radio wave absorbing layer contains the resin binder (1c), magnetic iron oxide powder (1a), and carbon-based fine particles (1b) which magnetically resonate in a frequency band of 20-300 GHz. The reinforcement layer is formed of a dielectric material. The radio wave absorber is set with plate shape in which the thickness is smaller than the principal surface, and is self-standing. USE - Radio wave absorber for absorbing radio waves used in mobile communication of mobile phone, wireless local area network (LAN), and automatic electronic toll collection (ETC) system. ADVANTAGE - The radio wave absorber stands on its own while having plate shape with small thickness with respect to the main surface, by having the reinforcing layer arranged on the side of the radio wave incident surface. Thus, the radio wave absorber is easily arranged on the path of radio waves to be absorbed, and the adverse effects of unwanted radio waves are prevented. The radio wave absorber includes a support element capable of maintaining the radio wave absorber at predetermined angle, and the surface on the side of the radio wave incident surface is kept inclined with respect to the traveling direction of the radio waves to be absorbed. Thus, radio wave absorber is realized with high return loss that suppresses the influence of radio waves reflected on the surface of the reinforcing layer. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the radio wave absorber. Radio wave absorbing layer (1) Magnetic iron oxide powder (1a) Carbon-based fine particle (1b) Resin binder (1c) Reinforcement layer (2)