EMI protected aircraft

• US 5,670,742 A
• Filed: 02/04/1994
• Issued: 09/23/1997
• Est. Priority Date: 02/04/1994
• Status: Expired due to Term

• Current Assignee: Threshold Technologies, Inc.
• Original Assignee: Threshold Technologies, Inc.
• Inventors: Jones, Scott A.
• Primary Examiner(s): Walberg, Teresa J.
• Assistant Examiner(s): PAIK, SANG YEOP
• Application Number:
  US08/191,096
• Time in Patent Office: 1,327 Days
• Field of Search: 174/35 R, 174/36, 174/35 C, 174/35 SM, 174/356 C, 174/35 MJ, 219/740, 361/816, 361/818
• US Class Current: 174/384
• CPC Class Codes: B64D 11/00 Passenger or crew accommodation; Flight-deck installations not otherwise provided for
• CPC Class Codes: B64D 45/0031 means for overriding or restricting access to flight controls
• CPC Class Codes: B64D 45/0063 by avoiding the use of electronic equipment during flight, e.g. of mobile phones or laptops
• CPC Class Codes: B64D 45/02 Lightning protectors; Static dischargers in general H01T
• CPC Class Codes: H05K 9/00 Screening of apparatus or components against electric or magnetic fields devices for absorbing radiation from an antenna H01Q17/00

Abstract

A device for shielding aircraft avionics and other electronic equipment from electromagnetic radiation generated by electronic devices used aboard the aircraft. The device includes a contiguous conductive shield which can be of wire mesh and which partially or completely surrounds a compartment or compartments of the aircraft, such as the passenger compartment and cargo compartments, and absorbs and dissipates the electromagnetic radiation which originates in the compartment from the electronic devices. The aircraft windows are also shielded with the conductive shield or, alternatively, may be coated with a transparent thin conductive polymer to allow better viewing.

Claims

1. A device, comprising:

a conductive shield positioned surrounding a compartment of an aircraft, aircraft avionics and other aircraft electronic equipment being located outside the compartment, and the shield protecting the avionics and the other electronic equipment from electromagnetic interference generated within the compartment.

2. A device as recited in claim 1, wherein the compartment, surrounded by the conductive shield, is a passenger compartment.

3. A device as recited in claim 1, wherein the compartment, surrounded by the conductive shield, is a cargo compartment.

4. A device as recited in claim 1, wherein the compartment, surrounded by the conductive shield, is at least one of a passenger compartment and a cargo compartment.

5. A device as recited in claim 1, wherein the conductive shield comprises a Faraday cage.

6. A device as recited in claim 1, wherein the conductive shield comprises a wire mesh.

7. A device as recited in claim 1, wherein the conductive shield comprises a metallic foil.

8. A device as recited in claim 1, wherein the conductive shield comprises a metallic spray coating.

9. A device as recited in claim 6, wherein the wire mesh is copper.

10. A device as recited in claim 7, wherein the metallic foil is copper.

11. A device as recited in claim 1, wherein the conductive shield surrounding the compartment comprises a conductive surface blocking at least that electromagnetic interference having a frequency ranging from 100 KHz to 10 GHz.

12. A device as recited in claim 1, wherein the conductive shield has a thickness of at least 10 nanometers.

13. A device as recited in claim 2, wherein the conductive shield is contiguous and completely electrically isolates the passenger compartment.

14. A device as recited in claim 2, wherein the conductive shield partially electrically isolates the passenger compartment.

15. A device for protecting an aircraft'"'"'s electronic control equipment from electromagnetic interference generated by passenger devices operated in a passenger compartment, comprising:

a conductive shield surrounding the passenger compartment, excluding aircraft avionics and other electronic equipment, with the avionics and the other electronic equipment being exterior to the shield and keeping the electromagnetic interference generated by the passenger devices contained within the shield.

16. A device as recited in claim 15, wherein said shield is a contiguous conductive shield comprising a plurality of panel sections, each panel section having a strip of conductive material surrounding the panel section and connecting adjacent panel sections.

17. A device as recited in claim 15, wherein the aircraft passenger compartment comprises an exterior skin and an inner wall, and the conductive shield is attached to the passenger compartment between the inner wall and the exterior skin.

18. A device as recited in claim 15, wherein the passenger compartment includes ceiling, wall and floor panels and the conductive shield is adapted to be a part of the ceiling, wall and floor panels of the passenger compartment.

19. A device as recited in claim 15, wherein the shield is copper mesh.

20. A device as recited in claim 15, wherein the passenger compartment includes a window, and further comprising the window including a conductive polymer shield connected to the conductive shield and covering the window.

21. A device as recited in claim 20, wherein the conductive polymer shield is transparent.

22. A device as recited in claim 15, wherein the shield is attached to an inner wall of the aircraft passenger compartment.

23. A device as recited in claim 15, wherein the shield is adhesively attached.

24. A device as recited in claim 15, wherein the passenger compartment includes a window;

and wherein said conductive shield comprises;

a panel section surrounding said window and including a conductive ring section which conforms to a shape of said window; and

a window section of said shield covering said window and including a conductive ring surrounding said window, and with the conductive ring of the panel section overlapping the conductive ring surrounding said window.

25. A device as recited in claim 23, wherein said window section comprises one of a conductive polymer and a conducting mesh.

26. A device, comprising:

a conductive shield surrounding a passenger compartment of an aircraft, the passenger compartment not including aircraft avionics and other aircraft electronic equipment, the passenger compartment having a window, and said shield comprising one of a conductive polymer or a conductive mesh included within the window.

27. A device for protecting aircraft electronic equipment from electromagnetic radiation, comprising:

an electromagnetic radiation shield surrounding a passenger compartment, the compartment including passenger devices generating the electromagnetic radiation, the passenger compartment including a window and a door having a door frame, said shield comprising;

copper mesh wall panels in walls of the passenger compartment, each of said wall panels including respective conductive rings surrounding the copper mesh wall panels, with the conductive rings overlapping to conductively connect adjacent wall panels;

a thin conductive copper mesh window panel surrounding said window and including a conductive ring surrounding and adjacent to said window;

a conducting polymer section shielding said window and including a conductive ring which surrounds the section, with the conductive ring of the window panel surrounding the window overlapping and conductively connecting the conductive ring of the polymer section shielding the window;

a first section of copper mesh shielding covering said door; and

a second section of copper mesh shielding covering the door frame to form a seal preventing the electromagnetic radiation from escaping the passenger compartment between the door and door frame when the door is closed.

28. A shield apparatus for an aircraft having a passenger compartment, comprising:

a conducting shield surrounding the passenger compartment and containing within the compartment electromagnetic energy produced by passenger devices within the compartment.

29. A shield apparatus for an aircraft having a passenger compartment and an external antenna, comprising:

a conducting shield surrounding the passenger compartment and containing within the compartment electromagnetic energy produced by passenger devices within the compartment and preventing the energy from irradiating the antenna.

30. An apparatus, comprising:

an aircraft having a passenger compartment, an avionics compartment separate from the passenger compartment containing passenger devices producing electromagnetic energy and an antenna extending external of the aircraft; and

a electromagnetically conductive shield surrounding the passenger compartment and keeping the electromagnetic energy produced by the devices within the passenger compartment and preventing the electromagnetic energy from irradiating the antenna and the avionics compartment.