Device, intended to be fixed on a wall, for absorbing electromagnetic waves

Patent metadata

Field	Value
Publication number	US-9991603-B2
Application number	US-201615142359-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Apr 30, 2015
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A device, intended to be fixed on a wall, for absorbing electromagnetic waves. The absorption device comprises a metal plate intended to be fixed on the wall, a dielectric panel at a distance from the metal plate and delimiting, with the metal plate, a volume between the metal plate and the dielectric panel, an array of resistive dipoles, all the resistive dipoles being fixed on the same face of the dielectric panel, and each comprising two metal platelets at a distance from one another and a resistor arranged between the opposing edges of two neighboring metal platelets.

First claim

The invention claimed is:

1. An absorption device, intended to be fixed on a wall, for absorbing electromagnetic waves, the absorption device comprising:
a metal plate intended to be fixed on the wall,
a dielectric panel at a distance from the metal plate and delimiting, with the metal plate, a volume between the metal plate and the dielectric panel, and
a plurality of resistive dipoles forming an array, all the resistive dipoles being fixed on the same face of the dielectric panel, and each comprising two metal platelets at a distance from one another and a resistor arranged between the opposing edges of two neighboring metal platelets, wherein the resistive dipoles are arranged in parallel rows and parallel columns perpendicular to the parallel rows, and wherein a resistive dipole is arranged at each intersection of the parallel rows and parallel columns, and wherein the two metal platelets of each resistive dipoles are arranged horizontally,
wherein the absorption device comprises a plurality of metal walls electrically connected to the metal plate and extending from the metal plate in the direction of the dielectric panel, and
wherein a metal wall from the plurality of metal walls is disposed between neighboring resistive dipoles in the parallel rows.

2. The absorption device according to claim 1 , wherein the resistor is a discrete component.

3. The absorption device according to claim 1 , wherein the resistor is a resistive layer.

4. The absorption device according to claim 1 , wherein the volume is filled with a dielectric material.

5. The absorption device according to claim 4 , wherein the metal walls extend over a length of between 85% and 115% of the distance between the metal plate and the dielectric panel.

6. The absorption device according to claim 1 , further comprising struts and a protective plate which are made of dielectric materials, each strut being fixed on the metal plate and having a free end which extends beyond the dielectric panel, the protective plate being fixed to the free end in order to protect the absorption device from rain.

7. The absorption device according to claim 1 , wherein a metal wall from the plurality of metal walls is disposed between all neighboring resistive dipoles in the parallel rows.

8. The absorption device according to claim 1 , further comprising a strut adjacent to one of the metal walls, the struct being fixed to the metal plate and having a free end which extends beyond the dielectric panel and is coupled to a protective plate extending parallel to the metal plate.

9. A building comprising:
at least one wall and
an absorption device comprising:
a metal plate,
a dielectric panel at a distance from the metal plate and delimiting, with the metal plate, a volume between the metal plate and the dielectric panel, and
a plurality of resistive dipoles forming an array, all the resistive dipoles being fixed on the same face of the dielectric panel, and each comprising two metal platelets at a distance from one another and a resistor arranged between the opposing edges of two neighboring metal platelets, wherein the resistive dipoles are arranged in parallel rows and parallel columns perpendicular to the parallel rows, and wherein a resistive dipole is arranged at each intersection of the parallel rows and parallel columns, and wherein the two metal platelets of each resistive dipoles are arranged horizontally,
wherein the absorption device comprises a plurality of metal walls electrically connected to the metal plate and extending from the metal plate in the direction of the dielectric panel, wherein a metal wall from the plurality of metal walls is disposed between neighboring resistive dipoles in the parallel rows, and

wherein the metal plate is fixed on the building wall.

10. The building according to claim 9 , wherein the resistor is a discrete component.

11. The building according to claim 9 , wherein the resistor is a resistive layer.

12. The building according to claim 9 , wherein the volume is filled with a dielectric material.

13. The building according to claim 12 , wherein the metal walls extend over a length of between 85% and 115% of the distance between the metal plate and the dielectric panel.

14. The building according to claim 9 , further comprising struts and a protective plate which are made of dielectric materials, each strut being fixed on the metal plate and having a free end which extends beyond the dielectric panel, the protective plate being fixed to the free end in order to protect the absorption device from rain.

15. The building of claim 9 , wherein a metal wall from the plurality of metal walls is disposed between all neighboring resistive dipoles in the parallel rows.

16. The building of claim 9 , further comprising a strut adjacent to one of the metal walls, the struct being fixed to the metal plate and having a free end which extends beyond the dielectric panel and is coupled to a protective plate extending parallel to the metal plate.

Assignees

• Airbus Operations Sas

Inventors

• Thain Andrew
• Jaber Anass
• Herve Alexandre

Classifications

• H01Q17/00 Primary

  Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems · CPC title

• E04B1/92

  Protection against other undesired influences or dangers (buildings providing protection against external dangers E04H9/00; shielding against dangerous radiation G21F) · CPC title

• H05K9/0003

  Shielded walls, floors, ceilings, e.g. wallpaper, wall panel, electro-conductive plaster, concrete, cement, mortar · CPC title

• E04B2001/925

  Protection against harmful electro-magnetic or radio-active radiations, e.g. X-rays · CPC title

• H05K9/0001 Primary

  Rooms or chambers (anechoic chambers G01R29/0821) · CPC title