Film antenna and display device including the same
A film antenna according to an embodiment of the present invention includes a dielectric layer, and a vertical radiation pattern and a horizontal radiation pattern on an upper surface of the dielectric layer. The vertical radiation pattern and the horizontal radiation pattern are arranged together on the same plane. Multi-axis radiation properties may be implemented in the same film by the vertical radiation pattern and the horizontal radiation pattern.
1. A film antenna, comprising:
a dielectric layer having an upper surface and a lower surface opposite to the upper surface;
a vertical radiation pattern on the upper surface of the dielectric layer; and
a horizontal radiation pattern on the upper surface of the dielectric layer, the vertical radiation pattern and the horizontal radiation pattern being arranged on the same plane,
wherein a distance between a center of the vertical radiation pattern and a center of the horizontal radiation pattern adjacent to each other is λ/2 or more.
2. The film antenna according to claim 1 , wherein a length of the vertical radiation pattern is λ/2 or more.
3. The film antenna according to claim 1 , wherein the horizontal radiation pattern comprises a signal electrode and a ground electrode disposed on the same plane.
4. The film antenna according to claim 3 , wherein the ground electrode comprises a pair of the ground electrodes, and a portion of the signal electrode extends between the pair of the ground electrodes.
5. The film antenna according to claim 3 , wherein a length of the signal electrode is λ/4 or more.
6. The film antenna according to claim 1 , wherein the vertical radiation pattern comprises a plurality of the vertical radiation patterns, and the horizontal radiation pattern comprises a plurality of the horizontal radiation patterns; and
the plurality of the vertical radiation patterns comprise a plurality of vertical radiation groups each formed by a predetermined number of the vertical radiation patterns, and the plurality of the horizontal radiation patterns comprise a plurality of horizontal radiation groups each formed by a predetermined number of the horizontal radiation patterns.
7. The film antenna according to claim 6 , wherein the plurality of the vertical radiation groups are successively arranged, and the plurality of the horizontal radiation groups are successively arranged, while the plurality of the vertical radiation groups and the plurality of the horizontal radiation groups are not mixed with each other to prevent radiation interference.
8. The film antenna according to claim 6 , wherein at least one of the plurality of the horizontal radiation patterns is rotated with respect to another horizontal radiation pattern in a planar view.
9. The film antenna according to claim 8 , wherein the horizontal radiation patterns included in at least one of the plurality of the horizontal radiation groups are rotated with respect to the horizontal radiation patterns included in another horizontal radiation group in the planar view.
10. The film antenna according to claim 1 , further comprising a ground layer formed on the lower surface of the dielectric layer.
11. The film antenna according to claim 10 , wherein the horizontal radiation pattern is not superimposed over the ground layer in a planar view.
12. The film antenna according to claim 1 , further comprising:
a first transmission line connected to the vertical radiation pattern;
a second transmission line connected to the horizontal radiation pattern;
a first pad electrically connected to the vertical radiation pattern via the first transmission line; and
a second pad electrically connected to the horizontal radiation pattern via the second transmission line.
13. The film antenna according to claim 1 , further comprising a dummy pattern formed around the vertical radiation pattern and the horizontal radiation pattern.
14. The film antenna according to claim 13 , wherein the vertical radiation pattern, the horizontal radiation pattern and the dummy pattern include a mesh pattern structure.
15. A display device comprising the film antenna according to claim 1 .
16. A film antenna, comprising:
a dielectric layer having an upper surface and a lower surface opposite to the upper surface;
a vertical radiation pattern on the upper surface of the dielectric layer; and
a horizontal radiation pattern on the upper surface of the dielectric layer;
a first transmission line connected to the vertical radiation pattern;
a second transmission line connected to the horizontal radiation pattern;
a first pad electrically connected to the vertical radiation pattern via the first transmission line; and
a second pad electrically connected to the horizontal radiation pattern via the second transmission line,
wherein the vertical radiation pattern, the horizontal radiation pattern, the first transmission line, the second transmission line, the first pad and the second pad are arranged on the same plane.
17. The film antenna of claim 16 , wherein the horizontal radiation pattern comprises a pair of ground electrodes and a signal electrode of which a part is positioned between the pair of the ground electrodes.