Frequency-selective surface composite structure

Patent metadata

Field	Value
Publication number	US-10164326-B2
Application number	US-201615171561-A
Country	US
Kind code	B2
Filing date	Jun 2, 2016
Priority date	Jun 2, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A frequency-selective composite structure includes a laminate panel, and a frequency-selective filter including a plurality of frequency-selective surface elements coupled to an exterior surface of the laminate panel and arranged in a frequency-selective surface pattern, wherein each one of the frequency-selective surface elements includes a nanomaterial composite.

First claim

What is claimed is:

1. A frequency-selective surface composite structure comprising:
a laminate panel;
a frequency-selective surface filter comprising a plurality of frequency-selective surface elements coupled to an exterior surface of said laminate panel and arranged in a frequency-selective surface pattern; and
a multifunctional layer coupled to said exterior surface of said laminate panel and surrounding said frequency-selective surface filter,
wherein each one of said frequency-selective surface elements and said multifunctional layer comprises a nanomaterial composite.

2. The frequency-selective surface composite structure of claim 1 wherein said nanomaterial composite comprises:
a carrier; and
a nanomaterial structure bonded to said carrier.

3. The frequency-selective surface composite structure of claim 2 wherein said nanomaterial structure comprises a network of nanomaterials deposited on a surface of said carrier.

4. The frequency-selective composite structure of claim 3 wherein said nanomaterials are conductive.

5. The frequency-selective surface composite structure of claim 3 wherein said nanomaterials are carbon nanotubes.

6. The frequency-selective surface composite structure of claim 2 wherein said carrier comprises one of a woven or a non-woven carbon fiber material.

7. The frequency-selective surface composite structure of claim 6 wherein said carrier further comprises a metallic coating.

8. The frequency-selective surface composite structure of claim 7 wherein said metallic coating comprises a nickel coating.

9. The frequency-selective surface composite structure of claim 1 wherein said plurality of frequency-selective surface elements are suitably spaced apart to dissipate an electrical voltage across said frequency-selective surface pattern.

10. The frequency-selective composite structure of claim 1 wherein said plurality of frequency-selective surface elements are suitably spaced apart from said multifunctional layer to dissipate an electrical voltage from said frequency-selective surface pattern to said multifunctional layer, and wherein said multifunctional layer is grounded.

11. An antenna system comprising:
a frequency-selective surface composite structure comprising:
a laminate panel;
a frequency-selective surface filter comprising a plurality of frequency-selective surface elements coupled to an exterior surface of said laminate panel and arranged in a frequency-selective surface pattern; and
a multifunctional layer coupled to said exterior surface of said laminate panel and surrounding said frequency-selective surface filter,
wherein each one of said frequency-selective surface elements and said multifunctional layer comprises a nanomaterial composite; and

an RF antenna positioned behind said frequency-selective filter.

12. The antenna system of claim 11 wherein said nanomaterial composite comprises:
a carrier; and
a nanomaterial structure bonded to said carrier.

13. The antenna system of claim 12 wherein said nanomaterial structure comprises a network of carbon nanotubes deposited on a surface of said carrier.

14. The antenna system of claim 13 wherein said carrier comprises:
one of a woven or a non-woven carbon fiber material; and
a metallic coating.

15. The antenna system of claim 14 wherein said metallic coating comprises a nickel coating.

16. The antenna system of claim 11 wherein said plurality of frequency-selective surface elements are suitably spaced apart to dissipate an electrical voltage across said frequency-selective surface pattern.

17. The antenna system of claim 16 wherein:
said plurality of frequency-selective surface elements are suitably spaced apart from said multifunctional layer to dissipate said electrical voltage from said frequency-selective surface pattern to said multifunctional layer; and
said multifunctional layer is grounded to an underlying support structure.

18. A method for making a frequency-selective composite structure, said method comprising:
providing a laminate panel;
providing a frequency-selective surface filter comprising a plurality of frequency-selective surface elements coupled to an exterior surface of said laminate panel and arranged in a frequency-selective surface pattern, wherein each one of said frequency-selective surface elements comprises a nanomaterial composite; and
co-curing said laminate panel and said plurality of frequency-selective surface elements.

19. The method of claim 18 further comprising transferring said plurality of frequency-selective surface elements arranged in said frequency-selective surface pattern to said exterior surface of said laminate panel prior to co-curing.

20. The method of claim 18 further comprising coupling a multifunctional layer to said exterior surface of said laminate panel, surrounding said frequency-selective surface filter.

Assignees

• Boeing Co

Inventors

• Urcia Manny S
• Braley Daniel J
• Lavin Ronald O

Classifications

• H01Q15/0013 Primary

  said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• H01Q1/42

  Housings not intimately mechanically associated with radiating elements, e.g. radome · CPC title

• H01P1/20 Primary

  Frequency-selective devices, e.g. filters · CPC title