Antenna device and display device including the same
An antenna device according to an embodiment of the present disclosure includes a dielectric layer, a first electrode layer disposed on an upper surface of the dielectric layer, the first electrode layer including a radiator and having a first mesh structure, and a second electrode layer disposed on a lower surface of the dielectric layer, the second electrode layer having a second mesh structure. The first mesh structure and the second mesh structure are aligned to be offset or staggered from each other with respect to the dielectric layer in a planar view.
1. An antenna device, comprising:
a dielectric layer;
a first electrode layer disposed on an upper surface of the dielectric layer, the first electrode layer including a radiator and having a first mesh structure; and
a second electrode layer disposed on a lower surface of the dielectric layer, the second electrode layer having a second mesh structure,
wherein the first mesh structure includes first electrode lines which cross each other to define first unit cells, and the second mesh structure includes second electrode lines which cross each other to define second unit cells,
wherein the first mesh structure and the second mesh structure are aligned to be offset or staggered from each other with respect to the dielectric layer in a planar view.
2. The antenna device according to claim 1 , wherein the first unit cells and the second unit cells are projected in the planar view to be offset or staggered from each other such that sub-cells each of which is smaller than each of the first and second unit cells are formed.
3. The antenna device according to claim 2 , wherein the first unit cells and the second unit cells are each uniformly divided into a plurality of the sub-cells.
4. The antenna device according to claim 2 , wherein each of the first unit cells, the second unit cells and the sub-cells has a rhombus shape.
5. The antenna device according to claim 4 , wherein the first unit cells and the second unit cells are each divided into 4 sub-cells.
6. The antenna device according to claim 1 , wherein the second electrode layer serves as a ground electrode of the radiator.
7. The antenna device according to claim 6 , wherein the first electrode layer further includes a dummy electrode around the radiator, and the dummy electrode is separated from the radiator.
8. The antenna device according to claim 7 , wherein the dummy electrode includes the first mesh structure.
9. The antenna device according to claim 8 , wherein the radiator and the dummy electrode are entirely superimposed over the second electrode layer in a thickness direction.
10. The antenna device according to claim 1 , wherein the second electrode layer includes a lower radiator and a lower dummy electrode formed from the second mesh structure.
11. The antenna device according to claim 1 , further comprising:
a transmission line electrically connected to the radiator on the upper surface of the dielectric layer; and
a signal pad connected to an end of the transmission line.
12. The antenna device according to claim 11 , wherein the signal pad has a solid structure.
13. The antenna device according to claim 11 , further comprising a ground pad on the upper surface of the dielectric layer, wherein the ground pad is disposed around the signal pad to be separated from the signal pad.
14. The antenna device according to claim 1 , wherein the first electrode layer and the second electrode layer include silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), tin (Sn), zinc (Zn), molybdenum (Mo), calcium (Ca) or an alloy thereof.
15. A display device comprising the antenna device according to claim 1 .