US 11,721,890 B2
Building material
Juha Lilja, Tampere (FI)
Assigned to StealthCase Oy, Tampere (FI)
Filed by StealthCase Oy, Tampere (FI)
Filed on Nov. 24, 2020, as Appl. No. 17/102,516.
Application 17/102,516 is a continuation of application No. 16/753,525, granted, now 10,879,603, previously published as PCT/FI2018/050719, filed on Oct. 8, 2018.
Claims priority of application No. U20174233 (FI), filed on Oct. 10, 2017; application No. U20174243 (FI), filed on Oct. 27, 2017; application No. 20176043 (FI), filed on Nov. 22, 2017; and application No. 20185031 (FI), filed on Jan. 11, 2018.
Prior Publication US 2021/0083375 A1, Mar. 18, 2021
Int. Cl. H01Q 1/44 (2006.01); H01Q 1/12 (2006.01); H01Q 1/22 (2006.01); H01Q 13/10 (2006.01); H01Q 15/00 (2006.01); H01Q 21/08 (2006.01); E06B 3/67 (2006.01)
CPC H01Q 1/44 (2013.01) [H01Q 1/1271 (2013.01); H01Q 1/22 (2013.01); H01Q 13/103 (2013.01); H01Q 15/002 (2013.01); H01Q 21/08 (2013.01); E06B 3/6715 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wall or façade structure for improving quality of reception of a wireless communication device inside a building from a base station located outside of the building, said building having the wall or façade structure as a part of a building envelope, wherein said wall or façade structure is configured to boost transmission of electromagnetic signals through the building envelope, said wall or façade structure comprising at least one electrically conductive low emissivity surface, wherein the wall or façade structure comprises a first aperture and a second aperture, wherein
said first aperture and said second aperture are isolated from each other for providing narrow aperture diffraction and to obtain diversity reception at a first frequency in shadow areas inside the building,
said first aperture and said second aperture comprise a plurality of focused radiation sources separated by isolating the focused radiation sources of separate apertures by binding the adjacent focused radiation sources within the first aperture together by providing an envelope correlation coefficient larger than 0.1 between any of said adjacent focused radiation sources, and
a distance between said first aperture and said second aperture is between 1 and 10 meters to provide an envelope correlation coefficient of less than 0.1 for said apertures at the first frequency.