Display device including antenna and method of fabricating the same

1. A display device, comprising:

a substrate having a display area and a non-display area at a periphery of the display area;

at least one unit antenna disposed in the non-display area on the substrate and having a coplanar wave guide structure; and

a communication circuit unit transmitting and receiving a communication signal with the at least one unit antenna,

wherein the at least one unit antenna has a same layer and a same material as one of a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode of the display area,

wherein the at least one unit antenna comprises:

a feed line transmitting the communication signal and a ground voltage; and

a radiator transmitting and receiving a wireless signal corresponding to the communication signal,

wherein the feed line includes a transmission line transmitting the communication signal, a first ground line transmitting the ground voltage and disposed at a left side of the transmission line, and a second ground line transmitting the ground voltage and disposed at a right side of the transmission line,

wherein the radiator includes a transmission extending line connected to the transmission line, a first ground extending line connected to the first ground line, and a second ground extending line connected to the second ground line, and

wherein the transmission extending line and the first ground extending line constitute a first slot transmitting and receiving the wireless signal, and the transmission extending line and the second ground extending line constitute a second slot transmitting and receiving the wireless signal.

2. The device of claim 1 , wherein the communication circuit unit is mounted on a communication flexible printed circuit, and

wherein a first end portion of the communication flexible printed circuit is attached to the non-display area of the substrate and is connected to the at least one unit antenna.

3. The device of claim 2 , further comprising:

a reflector disposed under the substrate, the reflector reflecting the wireless signal transmitted from the radiator.

4. The device of claim 3 , wherein the reflector is disposed to contact a rear surface of the substrate, and

wherein a second end portion of the communication flexible printed circuit is attached to the reflector.

5. The device of claim 4 , wherein the second end portion of the communication flexible printed circuit is attached to a rear surface of the substrate, and

wherein the reflector is disposed under the communication circuit unit.

6. The device of claim 1 ,

wherein the transmission extending line has an “I” shape, the first ground extending line has a “U” shape and the second ground extending line has a “U” shape.

7. The device of claim 6 , wherein at least one of the first slot or the second slot has a first length along a first direction corresponding to ½ of a wavelength of the communication signal and a second length along a second direction equal to or greater than 1/20 of the wavelength of the communication signal and be equal to or smaller than ¼ of the wavelength of the communication signal.

8. The device of claim 1 , further comprising a cushion layer on a whole of a rear surface of the substrate.

9. The device of claim 1 , wherein the first slot and the second slot are symmetrically disposed with respect to the transmission line.

10. The device of claim 1 , wherein the first slot and the second slot are asymmetrically disposed with respect to the transmission line.

11. A method of fabricating a display device, comprising:

forming a metal layer in a display area on a substrate and at least one unit antenna having a coplanar wave guide structure in a non-display area at a periphery of the display area on the substrate; and

attaching a first end portion of a communication flexible printed circuit having a communication circuit unit transmitting and receiving a communication signal with the at least one unit antenna thereon to the non-display area of the substrate,

wherein the at least one unit antenna has a same layer and a same material as one of a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode of the display area,

wherein the at least one unit antenna comprises:

a feed line transmitting the communication signal and a ground voltage; and

a radiator transmitting and receiving a wireless signal corresponding to the communication signal,

wherein the feed line includes a transmission line transmitting the communication signal, a first ground line transmitting the ground voltage and disposed at a left side of the transmission line, and a second ground line transmitting the ground voltage and disposed at a right side of the transmission line,

wherein the radiator includes a transmission extending line connected to the transmission line, a first ground extending line connected to the first ground line, and a second ground extending line connected to the second ground line, and

wherein the transmission extending line and the first ground extending line constitute a first slot transmitting and receiving the wireless signal, and the transmission extending line and the second ground extending line constitute a second slot transmitting and receiving the wireless signal.

12. The method of claim 11 , further comprising:

forming a reflector under the substrate, the reflector reflecting the wireless signal transmitted from the radiator.

13. The method of claim 12 , wherein the reflector is disposed to contact a rear surface of the substrate.

14. The method of claim 13 , further comprising:

attaching a second end portion of the communication flexible printed circuit to the reflector.

15. The method of claim 12 , wherein the reflector includes a frame disposed under the communication circuit unit.

16. The method of claim 15 , further comprising attaching a second end portion of the communication flexible printed circuit to a rear surface of the substrate.