High-frequency diffusion sheet

Abstract

An object of the present invention is to provide a high-frequency diffusion sheet capable of increasing the opportunity to receive electromagnetic waves in a high frequency range by a communication device inside a building by reflecting and diffusing the electromagnetic waves in the high frequency range. A high-frequency diffusion sheet 10 of the present invention is used for diffusing electromagnetic waves in a high frequency range, and is configured with a laminate having an electromagnetic wave shielding layer 11 that has electromagnetic wave shielding properties, and an electromagnetic wave reflection layer 13 that is laminated on the electromagnetic wave shielding layer 11 and has electromagnetic wave reflectivity, and the electromagnetic wave shielding layer 11 is patterned in a plan view of the laminate, and has an opening portion 15 penetrating the electromagnetic wave shielding layer 11 in a thickness direction.

Dependencies are inferred from the claim text.