Radio wave reflector
Provided is a radio wave reflector that can reflect radio waves while the intensity thereof is maintained and that can maintain the scenery. The radio wave reflector of the present invention is a radio wave reflector for reflecting radio waves, wherein the intensity of a reflective wave as specular reflection of an incident wave is −30 dB or more relative to the intensity of the incident wave at a frequency, and the radio wave reflector has a total light transmittance of 65% or more as measured using a standard illuminant D65.
1 . A radio wave reflector for reflecting radio waves,
the intensity of a reflective wave as specular reflection of an incident wave being-30 dB or more relative to the intensity of the incident wave at a frequency, and
the radio wave reflector having a total light transmittance of 65% or more as measured using a standard illuminant D65.
2 . The radio wave reflector according to claim 1 , wherein the incident wave has any frequency of 2 GHz or more and 300 GHz or less.
3 . The radio wave reflector according to claim 1 ,
wherein
the radio wave reflector comprises a conductive thin film layer comprising an electric conductor for reflecting radio waves, a substrate layer comprising a substrate, a protective layer comprising a protective material for protecting the conductive thin film layer, and an adhesive layer comprising an adhesive for bonding the conductive thin film layer and the protective layer, and
the substrate layer, the conductive thin film layer, the adhesive layer, and the protective layer are laminated in this order.
4 . The radio wave reflector according to claim 3 , wherein the conductive thin film layer has a surface resistivity of 3.5Ω/□ or less and a thickness of 500 nm or less.
5 . The radio wave reflector according to claim 3 , wherein in the conductive thin film layer, regions without the electric conductor surrounded by one or a plurality of the electric conductors that are linear are periodically arranged at predetermined intervals.
6 . The radio wave reflector according to claim 5 , wherein the conductive thin film layer has an electric conductor coverage of 1% or more and 10% or less, the electric conductor coverage being defined as the percentage of the area occupied by the electric conductor per unit area.
7 . The radio wave reflector according to claim 5 , wherein the electric conductor has a line width of 0.1 μm or more and 4.0 μm or less.
8 . The radio wave reflector according to claim 3 , wherein the protective layer is subjected to anti-glare treatment or anti-reflection treatment.
9 . The radio wave reflector according to claim 1 , wherein the overall shape of the radio wave reflector is a polygonal shape having a one-side length of 15 cm or more.