Antenna device
Antenna device comprising one or more antennas, and a feeding element configured to feed a feeding signal to the one or more antennas. An antenna includes a substrate, a first patch arranged on a first layer of the substrate, and a second patch arranged on a second layer of the substrate substantially parallel to the first layer, wherein the first patch and the second patch have a different size and/or are offset with respect to each other in a direction substantially parallel to the first and second layers.
1. An antenna device, comprising:
an antenna; and
a feedline to feed a signal to the antenna, wherein
the antenna includes
a first substrate layer,
a second substrate layer below the first substrate layer along a first axis, the first axis being orthogonal to the first substrate layer and the second substrate layer,
a first patch above the first substrate layer along the first axis, and
a second patch above the second substrate layer along the first axis,
a center of the first patch is offset with respect to a center of the second patch along a second axis which is orthogonal to the first axis, and
the feedline extends along a third axis to the second patch, the third axis being orthogonal to the first axis and orthogonal to the second axis.
2. The antenna device as claimed in claim 1 , wherein the first patch and the second patch have a different width along the second axis.
3. The antenna device as claimed in claim 1 , further comprising an array of a plurality of antennas, the plurality of antennas including the antenna.
4. The antenna device as claimed in claim 3 , wherein a difference in size of the first patch and the second patch is different for at least two antennas of the array.
5. The antenna device as claimed in claim 3 , wherein the offset between the first patch and the second patch is different for at least two antennas of the array.
6. The antenna device as claimed in claim 3 , further comprising a power divider configured to distribute power to different antennas of the array.
7. The antenna device as claimed in claim 1 , wherein the antenna further includes one or more vias between the first patch and the second patch, the one or more vias extending along the first axis.
8. The antenna device as claimed in claim 1 , wherein the first substrate layer and the second substrate layer are composed of different materials.
9. The antenna device as claimed in claim 1 , wherein
the first substrate layer is composed of a first material having a first dielectric constant, and
the second substrate layer is composed of a second material having a second dielectric constant different from the first dielectric constant.
10. The antenna device as claimed in claim 1 , wherein the first substrate layer and the second substrate layer have different thicknesses.
11. The antenna device as claimed in claim 1 , wherein
the second patch is arranged on a first area of a surface of the second substrate layer, and
the antenna further includes a ground metal layer arranged on a second area of the surface of the second substrate layer opposite to the first area.
12. The antenna device as claimed in claim 1 , further comprising a through-substrate via configured to carry signals from one side of the first substrate layer to another side of the second substrate layer.
13. The antenna device as claimed in claim 12 , further comprising matching structures connected to connection pads of the through-substrate via.
14. The antenna device as claimed in claim 1 , wherein
the antenna includes a plurality of first patches and a plurality of second patches,
the plurality of first patches includes the first patch,
the plurality of first patches is arranged above the first substrate layer,
the plurality of second patches includes the second patch, and
the plurality of second patches is arranged above the second substrate layer.
15. The antenna device as claimed in claim 1 , wherein
the antenna includes a plurality of first patches,
the plurality of first patches includes the first patch,
the plurality of first patches is arranged above the first substrate layer, and
each first patch of the plurality of first patches is arranged spaced apart along the second axis by a first distance.
16. The antenna device as claimed in claim 15 , wherein
the antenna includes a plurality of second patches,
the plurality of second patches includes the second patch,
the plurality of second patches is arranged above the second substrate layer, and
each second patch of the plurality of second patches is arranged spaced apart along the second axis by a second distance.
17. The antenna device as claimed in claim 16 , wherein the first distance is different than the second distance.
18. The antenna device as claimed in claim 16 , wherein the first distance is greater than the second distance.