Granted Patent B2

US 12,395,231 · App. 18/084,602 · Granted Aug 19, 2025

Inventors: Tanan Hongnara (Tokyo, JP); Takayoshi Sasaki (Tokyo, JP); Yoshiki Shirasawa (Tokyo, JP); Hitoshi Onoda (Tokyo, JP); Katsumori Sasaki (Tokyo, JP); Keisuke Sato (Tokyo, JP); Ichiro Oshima (Tokyo, JP)

Assignee: DKK Company, Limited

H04B7/145H01Q15/147

Abstract

Claims (44)

1. A reflect array comprising:

a plurality of first elements and second elements, arranged on XY plane, for three directions of X direction, Y direction, and Z direction, the three directions are orthogonal to each other,

the first elements are arranged in the Y direction to form a first element row,

the second elements are arranged in the Y direction to form a second element row, and

the first element row and the second element row are arranged alternately, wherein,

the two angles of the maximum incidence and the maximum reflectance are on the same positive or negative side of X-axis.

2. The reflect array according to claim 1 , wherein

one of two angles of the maximum incidence and the reflectance is 1 degree to 30 degrees, and the other is 60 degrees to 89 degrees, with respect to the Z axis.

3. The reflect array according to claim 1 , wherein

the reflect array being formed as a deformable sheet that are configured to change its form.

4. The reflect array according to claim 1 , further comprising:

a fixing part for fixing the reflect array to outside of the reflect array.

5. A reflect array system comprising:

the multiple reflect arrays according to claim 1 , wherein

for an incidence-reflectance direction which is defined as the direction of a line where the XY plane intersects with a plane that contains the two directions of the maximum incidence and the maximum reflectance,

the reflect arrays, with different incidence-reflectance directions from each other, are alternately arranged.

6. A reflect array system comprising:

multiple reflect arrays according to claim 1 , wherein

for an incidence-reflectance direction which is defined as the direction of a line where the XY plane intersects with a plane that contains the two directions of the maximum incidence and the maximum reflectance,

the reflect arrays, with 90 degrees different incidence-reflectance directions from each other, are alternately arranged.

7. A reflect array system comprising:

multiple reflect arrays according to claim 1 , wherein

for an incidence-reflectance direction which is defined as the direction of a line where the XY plane intersects with a plane that contains the two directions of the maximum incidence and the maximum reflectance,

the reflect arrays, with different incidence-reflectance directions from each other by a predetermined angle, are alternately arranged,

such that the incidence-reflectance directions of the reflect arrays differs by the predetermined angle.

8. A communication system comprising:

base stations, and

multiple reflect arrays according to claim 1 , wherein

each reflect array is installed between two of the base stations.

9. A communication system comprising:

a base station is provided on a wall surface, wherein

multiple reflect arrays according to claim 1 are provided on a ceiling.

10. A communication system comprising:

a base station provided on a wall surface, wherein

multiple reflect arrays according to claim 1 are provided on a wall surface.

11. A communication system comprising:

a base station provided on a wall surface, wherein

multiple reflect arrays according to claim 1 are provided on a floor.

12. A wall material with a built-in reflect array comprising:

a base material, and

the reflect array according to claim 1 .

13. A mobile communication system comprising:

a mobile receiver, and

the reflect array according to claim 1 , installed in a mobile body.

Assignments (1)

Continuity (1)

References Cited (17)