Diffraction device intended to be fixed onto the outer face of a wall

A building comprising:

• an outer wall having an outer face and a plurality of apertures arranged horizontally to one another, thus defining, on the outer face below the horizontal alignment of apertures, a lower surface and, above the horizontal alignment of apertures, an upper surface,
• for each lower surface and each upper surface, a diffraction device fixed to each lower surface and to each upper surface such that at least a part of the outer face is not covered by the diffraction device or pierced with the apertures, wherein each diffraction device comprises:
• a plurality of resonant elements in the form of an L-shaped profile which are electrically conductive and fixed parallel on the outer face, each resonant element comprising a first wall and a second wall secured at right angles to one another along a common edge, the first wall being intended to be fixed at right angles to the outer face by a fixing edge parallel to the common edge, whereas the edge of the second wall which is parallel to the common edge constitutes a free edge, and where the free edges of all the resonant elements are parallel and arranged on the same side relative to the common edge of the corresponding resonant element, and
• a protection arrangement configured to reinforce the protection of a capacitive area generated in a space between the outer face and the second wall, against weather attack, and taking the form of a panel produced with a dielectric material that is impermeable to water, fixed to the outer face and covering the plurality of resonant elements,
• wherein each part of the outer face which is not covered by the diffraction devices or pierced with the apertures is covered with a coating absorbing electromagnetic waves.

A building comprising:

• an outer wall having an outer face and a plurality of apertures arranged vertically to one another, thus defining, on the outer face to the left of each vertical alignment of apertures, a left lateral surface and, to the right of each vertical alignment of apertures, a right lateral surface,
• for each left lateral surface and each right lateral surface, a diffraction device fixed to each left lateral surface and each right lateral surface such that at least a part of the outer face is not covered by the diffraction device or pierced with the apertures, wherein each diffraction device comprises:
• a plurality of resonant elements in the form of an L-shaped profile which are electrically conductive and fixed parallel on the outer face, each resonant element comprising a first wall and a second wall secured at right angles to one another along a common edge, the first wall being intended to be fixed at right angles to the outer face by a fixing edge parallel to the common edge, whereas the edge of the second wall which is parallel to the common edge constitutes a free edge, and where the free edges of all the resonant elements are parallel and arranged on the same side relative to the common edge of the corresponding resonant element, and
• a protection arrangement configured to reinforce the protection of a capacitive area generated in a space between the outer face and the second wall, against weather attack, and taking the form of a panel produced with a dielectric material that is impermeable to water, fixed to the outer face and covering the plurality of resonant elements,
• wherein each part of the outer face which is not covered by the diffraction devices or pierced with the apertures is covered with a coating absorbing electromagnetic waves.