To obtain a radio wave absorber which is lightweight, which is excellent in a radio wave absorption characteristic and which reduces an irregularity in the absorption characteristic by a method wherein a resistance layer which is formed in such a way that long fibers composed of carbon fibers whose tensile elasticity is in a specific range are arranged at intervals so as to be substantially parallel is installed and a dielectric layer is installed.
A radio wave absorber is provided with a resistance film layer 2 and with a dielectric layer 3. In the resistance film layer 2, long fibers composed of carbon fibers whose tensile elasticity is at 3 to 180ton/mm2 or lower are arranged at intervals so as to be substantially parallel. As the long fibers, carbon long fibers which are arranged in the length direction are bonded by a resin such as an epoxy resin, a phenolic resin or the like. The dielectric layer 3 is formed on the rear of the resistance film layer 2, but it may be formed also on the front side. In this case, the resistance film layer 2 is sandwiched between the dielectric layers 3, 3.
ARIKAWA MINEYUKI
YAMAUCHI KAZUHIRO
HATAJIMA HITOSHI
