Conformable layered antenna array
View Patent ↗A low-cost antenna array and method of manufacturing the array, in a planar form or in a structurally flexible or curved array structure are shown. The antenna array has a plurality of metallic antenna electrical and radiator elements formed on a foam core layer bonded onto a metallic ground layer. The radiator elements preferably are formed on a thin dielectric carrier layer bonded to the foam core layer. The array can include one or more additional dielectric layers, each with a plurality of parasitic radiator elements formed thereon, mounted on top of the electrical elements. Manufacturing the array preferably includes bonding the layers to one another. The electrical and radiator elements are formed, preferably by etching, before the foam core layer is bonded to the ground layer. The additional dielectric layer and the parasitic radiators then are bonded to the already formed electrical elements on the ground layer.
1. An antenna array having a plurality of layers, comprising:
a metallic layer having at least one antenna electrical radiator element and feed element formed therein;
a first thin carrier dielectric layer having a top surface and a bottom surface, said metallic layer formed over said first thin carrier dielectric layer;
a foam core layer having a top surface and a bottom surface, wherein said first thin carrier dielectric layer is formed over said top surface of said foam core layer, said bottom surface of said thin carrier dielectric layer and said top surface having equal surface areas; and
a bonding layer formed on said bottom surface of said foam core layer, wherein said bonding layer is bonded to a metallic ground layer.
2. The antenna defined in claim 1 , wherein said metallic layer is adhesively bonded to said first thin carrier dielectric layer.
3. The antenna defined in claim 1 , wherein said first thin carrier dielectric layer is adhesively bonded to said foam core layer.
4. The antenna defined in claim 1 , wherein said metallic ground layer is a thin metallic layer.
5. The antenna defined in claim 4 , further including a non-conductive radome cover structure enclosing said antenna layers and providing support for said layers.
6. The antenna defined in claim 1 , further including said antenna layers adhesively bonded to one another.
7. The antenna defined in claim 1 , further including a radome cover structure enclosing said antenna layers.
8. The antenna defined in claim 1 , wherein at least a portion of said plurality of antenna layers are formed on a curved ground layer.
9. The antenna defined in claim 8 , wherein each of said plurality of antenna layers are formed from a flexible material to conform to said curved ground layer.
10. The antenna defined in claim 8 , wherein said foam core layer is formed into a curved shape to fit said curved ground layer.
11. The antenna defined in claim 1 , wherein said metallic ground layer is also a conducting tray to structurally support said antenna array.
12. The antenna defined in claim 1 , wherein said metallic ground layer is flexible.
13. An antenna array having a plurality of layers, comprising:
a metallic layer having at least one antenna electrical radiator element and feed element formed therein;
a first thin carrier dielectric layer, said metallic layer formed over said first thin carrier dielectric layer;
a foam core layer having a top surface and a bottom surface, wherein said first thin carrier dielectric layer is formed over said top surface of said foam core layer;
a bonding layer formed on said bottom surface of said foam core layer, wherein said bonding layer is bonded to a metallic ground layer; and
at least a second dielectric layer formed over said metallic layer and having at least one parasitic radiator element formed over a top surface of said second dielectric layer, wherein said at least one parasitic radiator element is electrically coupled with a corresponding radiator element in said metallic layer.
14. The antenna defined in claim 13 , further including said plurality of parasitic radiator elements formed over a top surface of a second thin carrier dielectric layer and said second thin carrier dielectric layer formed over said second dielectric layer.
15. The antenna defined in claim 13 , further including said layers adhesively bonded to one another.
16. The antenna defined in claim 13 , further including a radome cover structure enclosing said antenna layers.
17. The antenna defined in claim 13 , wherein said metallic ground layer is a thin metallic ground layer.
18. The antenna defined in claim 17 , further including a non-conductive radome cover structure enclosing said antenna layers and providing support for said antenna layers.
19. The antenna defined in claim 13 , wherein at least a portion of said plurality of antenna layers are formed over a curved ground layer.
20. The antenna defined in claim 19 , wherein each of said plurality of antenna layers are formed from a flexible material to conform to said curved ground layer.
21. The antenna defined in claim 19 , wherein said foam core layer is formed into a curved shape to fit said curved ground layer.
22. The antenna defined in claim 13 , wherein said metallic ground layer is a substantially rigid support metal layer.
23. An antenna array having a plurality of layers, comprising:
a metallic layer having at least one antenna electrical radiator element and feed element formed therein;
a first thin carrier dielectric layer, said metallic layer formed over said first thin carrier dielectric layer;
a foam core layer having a top surface and a bottom surface, wherein said first thin carrier dielectric layer is formed over said top surface of the foam core layer;
at least a second dielectric layer formed over said metallic layer; and
at least one parasitic radiator element formed on a top surface of a second thin carrier dielectric layer, wherein said at least one parasitic radiator element is electrically coupled with at least one corresponding radiator element in said metallic layer, said second thin carrier dielectric layer formed over said second dielectric layer wherein said layers are bonded to one another forming a stack, wherein a bonding layer is formed on a bottom surface of said foam core layer of said stack, and wherein said stack is bonded to a metallic ground layer by said bonding layer.
24. The antenna defined in claim 23 , further including a radome cover structure enclosing said antenna layers.
25. The antenna defined in claim 23 , wherein said metallic ground layer is a thin metallic layer.
26. The antenna defined in claim 25 , further including a non-conductive radome cover structure enclosing said antenna layers and providing support for said antenna layers.
27. The antenna defined in claim 23 , wherein at least a portion of said plurality of antenna layers are formed on a curved ground layer.
28. The antenna defined in claim 27 , wherein each of said plurality of antenna layers are formed from a flexible material to conform to said curved ground layer.
29. The antenna defined in claim 27 , wherein said foam core layer is formed into a curved shape to fit said curved ground layer.
30. The antenna defined in claim 23 , wherein said metallic ground layer is a substantially rigid support metal layer.
31. A method of manufacturing an antenna array, comprising the steps of:
forming a foam core layer having a top and a bottom surface;
bonding a metallic layer over a first thin carrier dielectric layer having a top surface and a bottom surface and bonding said first thin carrier dielectric layer to said top surface of said foam core layer wherein said top surface of said foam core layer and said bottom surface of said first thin carrier dielectric layer have an equal surface area;
applying a bonding layer on said bottom surface of said foam core layer;
etching at least one radiator element and feed element in said metallic layer; and
forming a metallic ground layer and bonding said bonding layer with said foam core layer, said first thin carrier dielectric layer and said metallic layer to said metallic ground layer.
32. The method defined in claim 31 , further including the step of enclosing said antenna layers in a radome cover.
33. The method defined in claim 31 , further including the step of forming said metallic ground layer from a thin metallic layer.
34. The method defined in claim 33 , further including the steps of forming a non-conductive radome cover structure for providing support for said antenna layers and enclosing and supporting said antenna layers in said radome cover structure.
35. The method defined in claim 31 , including the step of forming at least a portion of said plurality of antenna layers on a curved ground layer.
36. The method defined in claim 35 , including the step of forming each of said plurality of antenna layers from a flexible material and conforming said antenna layers to said curved ground layer.
37. The method defined in claim 35 , including the step of forming said foam core layer into a curved shape fitting said curved ground layer.
38. The method defined in claim 31 , including the step of forming said metallic ground layer as a substantially rigid support metal layer for said antenna layers.
39. A method of manufacturing an antenna array, comprising the steps of:
forming a foam core layer having a top and a bottom surface;
bonding a metallic layer over a first thin carrier dielectric layer and bonding said first thin carrier dielectric layer to said to surface of said foam core layer;
applying a bonding layer on said bottom surface of said foam core layer;
etching at least one radiator element and feed element in said metallic layer;
forming a metallic ground layer and bonding said bonding layer with said foam core layer, said first thin carrier dielectric layer and said metallic layer to said metallic ground layer;
bonding at least a second dielectric layer onto said metallic layer; and
forming at least one parasitic radiator element on a top surface of said second dielectric layer which couple with corresponding at least one radiator element formed in said metallic layer.
40. The method defined in claim 39 , further including the steps of forming said at least one parasitic radiator element on a top surface of a second thin carrier dielectric layer and bonding said second thin carrier dielectric layer to said second dielectric layer.
41. The method defined in claim 39 , further including the step of enclosing said antenna layers in a radome cover structure.
42. The method defined in claim 39 , including the step of forming at least a portion of said plurality of antenna layers on a curved ground layer.
43. The method defined in claim 42 , including the steps of forming each of said plurality of antenna layers from a flexible material and conforming said antenna layers to said curved ground layer.
44. The method defined in claim 42 , including the step of forming said foam core layer into a curved shape fitting said curved ground layer.
45. The method defined in claim 39 , including the step forming said metallic ground layer as a substantially rigid support metal layer for said antenna layers.
46. A method of manufacturing an antenna array, comprising the steps of:
forming a foam core layer having a top and a bottom surface;
bonding a metallic layer over a first thin carrier dielectric layer and bonding said first thin carrier dielectric layer to said top surface of said foam core layer;
applying a bonding layer on said bottom surface of said foam core layer;
etching at least one radiator element and feed element in said metallic layer;
forming a metallic ground layer and bonding said bonding layer with said foam core layer, said first thin carrier dielectric and said metallic layer to said metallic ground layer;
bonding at least a second dielectric layer onto said metallic layer radiator and feed elements; and
forming at least one parasitic radiator element on a top surface of said second dielectric layer.
47. The method defined in claim 46 , further including the step of enclosing said antenna layers in a radome cover.
48. The method defined in claim 46 , further including the step of forming said metallic ground layer from a thin metallic layer.
49. The method defined in claim 46 , further including the step of forming a non-conductive radome cover structure for supporting and enclosing said antenna layers in said radome cover structure.
50. The method defined in claim 46 , including the step of forming at least a portion of said plurality of antenna layers on a curved ground layer.
51. The method defined in claim 50 , including the steps of forming each of said plurality of antenna layers from a flexible material and conforming said antenna layers to said curved ground layer.
52. The method defined in claim 50 , including the step of forming said foam core layer into a curved shape fitting said curved ground layer.
53. The method defined in claim 46 , including the step of forming said metallic ground layer as a substantially rigid support metal layer for said antenna layers.