| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio wave shielding equipment, used in the opening of a duct provided for ventilation at windows, ceiling, floors, or sidewall of a building, that are inlets/outlets of leaked radio waves from a building or the unwanted radio waves from the outside, or the opening of a duct provided as heat radiation for a computer. SOLUTION: A plurality of plate materials 2 are arranged substantially parallel to each other, separated by intervals that are shorter than half-wavelength of a specified frequency, with a magnetic wall 3 that shields radio waves provided to each of them. The magnetic wall 3 is periodically provided with linear and polygonal metal patterns. COPYRIGHT: (C)2007,JPO&INPIT |
