Conductive textile assembly with electrical shielding structure
View Patent ↗A conductive assembly ( 10 ) includes a conductive fabric core ( 12 ) which includes at least one electrically conductive element woven with the fabric core, optionally first and second impermeable layers ( 14, 16 ) enveloping the fabric core ( 12 ), first and second spacer layers ( 18, 20 ) overlying or within the impermeable layers ( 14, 16 ) and first and second conductive shield or screen layers ( 22, 24 ) overlying the spacer layers. The shield layers are electrically coupled together in the preferred embodiment for electromagnetic shielding. The spacer layers ( 18, 20 ) provide a stable and uniform spacing between the shield or screen conductors ( 22, 24 ) and the conductive fabric core ( 12 ).
1. A conductive textile assembly including:
a textile substrate having a plurality of electrical conductors therein, the substrate including first and second opposing sides;
a first flexible conductive shield or screen layer disposed over the first side of the textile substrate;
a second flexible conductive shield or screen layer disposed over the second side of the textile substrate; and
first and second non-conductive flexible spacer layers each disposed between a respective shield or screen layer and the textile substrate, the first and second non-conductive flexible spacer layers defining distinct layers of the assembly;
wherein the first and second flexible conductive shield or screen layers are electrically insulated from the textile substrate, and
wherein the first and second spacer layers provide a substantially uniform dielectric gap between the conductors of the textile substrate and the first and second shield or screen layers over at least an operative section of the assembly.
2. A conductive textile assembly according to claim 1 , wherein each spacer is formed of a layer of non-conductive material or a thickness of non-conductive fibres disposed over the electrical conductors of the textile substrate and forming a part of the weave of the substrate.
3. A conductive textile assembly according to claim 1 , wherein the or each spacer retains a substantially consistent spacing between its respective shield or screen layer and the textile substrate, thereby to provide a substantially uniform dielectric gap between the conductors of the textile substrate and the shield or screen layers over at least an operative section of the assembly.
4. A conductive textile assembly according to claim 1 , wherein the substrate, the shield or screen layers and the spacers are bonded to one another.
5. A conductive textile assembly according to claim 1 , wherein
the textile substrate is a woven fabric and the plurality of electrical conductors are a part of the weave, and
the electrical conductors are disposed generally side by side in co-planar relationship with a substantially uniform spacing to the shield or screen layer.
6. A conductive textile assembly according to claim 1 , wherein the or each spacer is:
(i) a layer of non-conductive material, or
(ii) a thickness of non conductive fibres disposed over the electrical conductors of the textile substrate and forming a part of the weave of the substrate.
7. A conductive textile assembly according to claim 1 , wherein the non-conductive spacer is laterally compressible and substantially incompressible into the plane thereof.
8. A conductive textile assembly according to claim 1 , wherein the non-conductive spacer is formed of a layer of one of textile, foam or sheet material.
9. A conductive textile assembly according to claim 1 , wherein each non-conductive spacer is formed of an open mesh of non conductive filaments.
10. A conductive textile assembly according to claim 9 , wherein the non conductive filaments are arranged in a honeycomb array of tessellating polygons.
11. A conductive textile assembly according to claim 9 , wherein the non conductive spacer layer is formed from two or more layers of open mesh of non-conductive filaments.
12. A conductive textile assembly according to claim 1 , wherein each spacer layer is composed of non-conductive yarns disposed in both warp and weft directions of the fabric substrate and woven to form non-conductive textile layers on the first and second sides of the conductive layer.
13. A conductive textile assembly according to claim 1 , wherein each non-conductive spacer has a thickness of 0.5 to 1.0 millimetres.
14. A conductive textile assembly according to claim 1 , including two layers of impermeable material, each covering a respective side of the fabric, each layer of impermeable material being disposed directly adjacent the fabric substrate so as to overlie the or a respective spacer.
15. A conductive textile assembly according to claim 1 , wherein each flexible conductive shield or screen is formed of a woven fabric material.
16. The conductive textile assembly of claim 1 defined within a wearable item of apparel, the wearable item of apparel further including a flat, ribbon-like cable.
17. The conductive textile assembly of claim 1 provided within a vehicle fuselage, engine bay or equipment cabinet.