Antenna device and display device including the same
An antenna device according to an embodiment of the present invention includes a dielectric layer, a radiator disposed on a top surface of the dielectric layer, a transmission line connected to a side of the radiator on the dielectric layer, a signal pad connected to an end portion of the transmission line, a ground pad disposed around the signal pad, and an auxiliary radiator extending from the ground pad to be parallel to the transmission line.
1. An antenna device, comprising:
a dielectric layer;
a radiator disposed on a top surface of the dielectric layer;
a transmission line connected to a side of the radiator on the dielectric layer;
a signal pad connected to an end portion of the transmission line;
a ground pad disposed around the signal pad; and
an auxiliary radiator extending from the ground pad to be parallel to the transmission line,
wherein the auxiliary radiator has an area larger than that of the ground pad, and the auxiliary radiator has a width smaller than that of the ground pad.
2. The antenna device according to claim 1 , wherein the antenna device satisfies Equation 1:
0.3< D 2 /D 1 <0.99 [Equation 1]
wherein D 1 is a length of the transmission line, and D 2 is a length of the auxiliary radiator.
3. The antenna device according to claim 1 , wherein the auxiliary radiator is electrically and physically separated from the radiator and the transmission line.
4. The antenna device according to claim 1 , wherein the ground pad includes a pair of ground pads facing each other with the signal pad interposed therebetween.
5. The antenna device according to claim 4 , wherein the auxiliary radiator extends from each of the pair of ground pads.
6. The antenna device according to claim 1 , wherein the auxiliary radiator is a single member integrally connected to the ground pad.
7. The antenna device according to claim 6 , wherein the auxiliary radiator has the same shape as that of the ground pad, and has an internal structure different from that of the ground pad.
8. The antenna device according to claim 7 , wherein the auxiliary radiator has a mesh structure, and the ground pad has a solid pattern structure.
9. The antenna device according to claim 8 , further comprising a dummy mesh pattern on the dielectric layer to be disposed around the radiator and the auxiliary radiator.
10. The antenna device according to claim 1 , wherein the radiator and the auxiliary radiator are disposed at the same layer.
11. The antenna device according to claim 1 , further comprising a ground layer formed on a bottom surface of the dielectric layer.
12. The antenna device according to claim 11 , wherein the ground layer covers the auxiliary radiator and the radiator in a planar view with the dielectric layer interposed therebetween.
13. The antenna device element of claim 1 , wherein a resonance frequency of the auxiliary radiator is greater than a resonance frequency of the radiator.
14. A display device comprising the antenna device according to claim 1 .