当前申请(专利权)人地址：
Incorporated in Denmark, Alsvej 21, DK-8940 Randers SV, Denmark
摘要：
A wind turbine composite structure for absorbing radio frequency energy, the wind turbine composite structure comprising: a sandwich panel construction comprising a core having an inner surface and an outer surface, disposed between an inner skin and an outer skin; the outer surface and the outer skin facing towards an exterior surface of the wind turbine composite structure and the inner surface and the inner skin facing towards an interior of the wind turbine composite structure; a reflector layer disposed adjacent to the inner skin; and a functional layer comprising printed or deposited circuitry, the functional layer forming a radar absorbing circuit in combination with the reflector layer, wherein the functional layer is printed or deposited directly on to the outer surface of the core.
权利要求：
Claims
1. A wind turbine composite structure for absorbing radio frequency energy, the wind turbine composite structure comprising:
a sandwich panel construction comprising a core having an inner surface and an outer surface, disposed between an inner skin and an outer skin; the outer surface and the outer skin facing towards an exterior surface of the wind turbine composite structure and the inner surface and the inner skin facing towards an interior of the wind turbine composite structure;
a reflector layer disposed adjacent to the inner skin; and
a functional layer comprising printed or deposited circuitry, the functional layer forming a radar absorbing circuit in combination with the reflector layer, wherein
the functional layer is printed or deposited directly on to the outer surface of the core.
2. A wind turbine composite structure according to claim 1, wherein the functional layer is a circuit analogue layer.
3. A wind turbine composite structure according to claim 2, wherein circuit analogue layer is printed directly on the outer surface of the core by screen printing.
4. A wind turbine composite structure according to any one of the preceding claims, wherein the reflector layer includes a layer of carbon tissue.
5. A wind turbine composite structure according to claims 1 to 3, wherein the reflector layer includes a frequency selective surface.
6. A wind turbine composite structure according to claim 5, wherein the frequency selective surface comprises a circuit analogue layer printed or deposited on a substrate.
7. A wind turbine composite structure according to any one of the preceding claims, wherein the inner skin and the outer skin are fabricated from at least one layer of a fibre and resin composite matrix.
8 A wind turbine blade comprising a composite structure according to any one of the preceding claims.
9. A wind turbine nacelle comprising a composite structure according to any one of claims 1 to 8.
10. A method of manufacturing a wind turbine composite structure for absorbing radio frequency energy, the method comprising:
assembling a sandwich panel construction comprising a core having an inner surface and an outer surface, disposed between an inner skin and an outer skin; the outer surface and the outer skin facing towards an exterior surface of the wind turbine composite structure and the inner surface and the inner skin facing towards an interior of the wind turbine composite structure;
providing a reflector layer disposed adjacent to the inner skin;
providing a functional layer comprising printed or deposited circuitry, the functional layer forming a radar absorbing circuit in combination with the reflector layer, wherein the functional layer is printed or deposited directly on to the outer surface of the core.