Antenna apparatus having antenna spacer
In one embodiment of the present disclosure, an antenna assembly includes a patch antenna array including an upper patch antenna layer, a lower patch antenna layer, and a spacer therebetween, wherein the spacer includes a plurality of apertures defined by cell walls, wherein the each aperture aligns with an upper patch antenna element and a lower patent antenna element from the patch antenna array.
1. An antenna assembly, comprising:
a patch antenna array including an upper patch antenna layer, a lower patch antenna layer, and a spacer therebetween, wherein the spacer includes a plurality of apertures in a triangular lattice defined by cell walls between adjacent apertures, wherein each aperture aligns with an antenna element from the antenna array, each antenna element having an upper patch antenna element and a lower patch antenna element, wherein a center of each antenna element is substantially equally spaced from a center of its adjacent antenna elements, and wherein a center of each of the cell walls is substantially equidistant from a center of each antenna element and has a uniform thickness extending between each adjacent aperture, and wherein the spacer is made from a thermally conductive plastic.
2. The antenna assembly of claim 1 , wherein the patch antenna array includes a plurality of upper patch antenna elements on the upper patch antenna layer and a plurality of lower patch antenna elements on the lower patch antenna layer.
3. The antenna assembly of claim 1 , wherein the cell walls form a honeycomb pattern.
4. The antenna assembly of claim 1 , wherein the plurality of apertures defined by the cell walls are polygonal in shape.
5. The antenna assembly of claim 1 , wherein the cell walls are in the range of 1 mm to 2 mm wide.
6. The antenna assembly of claim 1 , wherein the cell walls are spaced from the edges of the patch antenna elements.
7. The antenna assembly of claim 1 , wherein the upper and lower patch antenna elements have a longest dimension in the range of 6 mm to 8 mm.
8. The antenna assembly of claim 1 , wherein the center of each of the upper and lower patch antenna elements is spaced from the center of adjacent upper and lower patch antenna elements by a distance in the range of 11 mm to 13.5 mm.
9. The antenna assembly of claim 1 , wherein the cell height is in the range of 1 mm to 2 mm.
10. The antenna assembly of claim 1 , wherein the spacer has a dielectric constant of less than 3.0.
11. The antenna assembly of claim 1 , wherein the spacer has a thermal conductivity value of greater than 0.35 W/m-K.
12. The antenna assembly of claim 1 , wherein the cell walls have a first end for coupling with the lower patch antenna layer and a second end for coupling with the upper patch antenna layer.
13. The antenna assembly of claim 12 , wherein the first and second ends of the cell walls couple to the lower and upper patch antenna layers by first and second adhesive patterns.
14. The antenna assembly of claim 13 , wherein the first and second adhesive patterns have a height in the range of 0.005 mm to 0.01 mm.
15. The antenna assembly of claim 13 , wherein the first and second adhesive patterns define intercellular vents.
16. The antenna assembly of claim 13 , wherein adhesive of the adhesive patterns has a dielectric constant of less than 3.0 and a thermal conductivity value in a range of 0.1 to 0.5 W/m-K.
17. The antenna assembly of claim 13 , wherein the adhesive has a durometer value in the range of 25 to 100 (Shore A).
18. The antenna assembly of claim 1 , wherein the upper patch antenna layer includes an upper GPS antenna patch element, wherein the lower patch antenna layer includes a lower GPS antenna patch element, and wherein the spacer includes a GPS antenna aperture, wherein the GPS antenna aperture aligns with the upper GPS patch antenna element and the lower GPS patch antenna element.
19. An antenna assembly, comprising:
a patch antenna array including an upper patch antenna layer, a lower patch antenna layer, and a spacer therebetween, wherein the spacer includes a plurality of apertures in a triangular lattice defined by cell walls between adjacent apertures, wherein each aperture aligns with a patch antenna element from a patch antenna array, wherein the spacer has a dielectric constant of less than 3.0 and a thermal conductivity value of greater than 0.35 W/m-K, wherein a center of each antenna element is substantially equally spaced from a center of its adjacent antenna elements, wherein a center of each of the cell walls is substantially equidistant from a center of each antenna element and has a uniform thickness extending between each adjacent aperture, and wherein the spacer is made from a thermally conductive plastic.
20. An antenna assembly, comprising:
a patch antenna array including an upper patch antenna layer, a lower patch antenna layer, and an antenna spacer therebetween, wherein the spacer is made from a thermally conductive plastic and includes a plurality of apertures in a triangular lattice defined by cell walls between adjacent apertures, wherein each aperture of the plurality of apertures aligns with an antenna element from the antenna array, each antenna element having an upper patch antenna element and a lower patch antenna element, wherein a center of each antenna element is substantially equally spaced from a center of its adjacent antenna elements, and wherein a center of each of the cell walls is substantially equidistant from a center of each antenna element and has a uniform thickness extending between each adjacent aperture;
a dielectric layer adjacent the lower patent antenna layer; and
a PCB adjacent the dielectric layer.
21. The antenna assembly of claim 20 , wherein the dielectric layer defines a fire enclosure layer.
22. The antenna assembly of claim 20 , wherein the antenna assembly includes adhesive patterns between adjacent layers, wherein the adhesive volume is greater between the PCB and the dielectric layer than between the lower or upper patch antenna layers and the spacer.