Antenna device and electrical device including the same

1. An antenna device for an electronic device for wireless communication, comprising:

an antenna area connected to a feeding line and a ground line, wherein the antenna area is configured to transmit/receive a signal of a first frequency band; and

a branching feeding pattern branching from the feeding line and connected to one side of the antenna area, wherein the branching feeding pattern is configured to enable the antenna area to transmit/receive a signal of a second frequency band.

2. The antenna device according to claim 1 , further comprising a radiator extended from the branching feeding pattern.

3. The antenna device according to claim 2 , wherein the antenna area is formed on a circuit board, and the radiator is formed on a dielectric area formed by fill-cutting the circuit board.

4. The antenna device according to claim 2 , wherein the branching feeding pattern is connected to the radiator via a switching structure.

5. The antenna device according to claim 4 , wherein the radiator is coupled to the antenna area and configured to form a floating dummy pattern.

6. The antenna device according to claim 2 , wherein the radiator receives a frequency band of a Long Term Evolution (LTE) band.

7. The antenna device according to claim 1 , wherein the antenna area includes a metallic component arranged on the antenna area, wherein the metallic component is configured to form a radiator.

8. The antenna device according to claim 1 , wherein at least a part of the antenna area is formed on a circuit board.

9. The antenna device according to claim 1 , further comprising a radiator connected to the antenna area by a C-clip.

10. The antenna device according to claim 1 , wherein the first frequency band includes a Wideband Code Division Multiple Access (WCDMA) band, and the second frequency band includes at least one Long Term Evolution (LTE) band.

11. The antenna device according to claim 1 , wherein the branching feeding pattern is connected to a ground.

12. The antenna device according to claim 1 , wherein the antenna area is configured to transmit/receive signals over at least two frequency bands.

13. The antenna device according to claim 1 , further comprising at least one additional feeding pattern branching from the branching feeding pattern.

14. The antenna device according to claim 1 , further comprising at least one radiator branching from the feeding line or the branching feeding pattern.

15. The antenna device according to claim 1 , wherein the electronic device for wireless communication is a mobile terminal.

16. An electronic device for wireless communication, comprising:

a processor; and

a communication module comprising an antenna device,

wherein the antenna device comprises an antenna area configured to transmit/receive a signal of a first frequency band and a radiator configured to transmit/receive a signal of a second frequency band,

wherein the radiator is connected to the antenna via a feeding switch structure, and

wherein the processor is configured to control the communication module to transmit/receive at least one of the signal of the first frequency band and the signal of the second frequency band.

17. The electronic device according to claim 16 , wherein the processor is further configured to selectively feed the feeding switch structure to determine whether to enable the radiator.

18. The electronic device according to claim 16 , wherein the processor is further configured to control the communication module to feed the feeding switch structure on the basis of a predetermined set value of the electronic device or location information of the electronic device.

19. The electronic device according to claim 16 , wherein the antenna area includes at least two feeding patterns configured to feed from different locations in the antenna area.

20. An antenna device for an electronic device for wireless communication, comprising:

an antenna area connected to a feeding line and a ground line, wherein the antenna area is configured to transmit/receive a signal of a first frequency band; and

a radiator connected to the antenna area via a feeding switch structure, wherein the radiator is configured to transmit/receive a signal of a second frequency band.