Antenna device and electronic device having the same

1. An electronic device comprising:

a first antenna radiator configured to operate in at least one frequency band; and

at least one second antenna radiator disposed in a neighborhood of the first antenna radiator,

wherein the at least one second antenna radiator is electrically coupled to at least one radiation pattern of the first antenna radiator to operate as a parasitic resonator, and

wherein the second antenna radiator is at least one of a metal vibrator, a motor, a metal tape, a portion of a shield can, a metal bushing having a predetermined area, and a metal bracket.

2. The electronic device of claim 1 , wherein the second antenna radiator is disposed in parallel so that it does not overlap the first antenna radiator.

3. The electronic device of claim 1 , wherein the second antenna radiator is at least one of a metal plate of a predetermined area disposed inside the electronic device, a printed circuit board of flexibility comprising a metal pattern and a conductive tape.

4. The electronic device of claim 1 , wherein the first antenna radiator is disposed in such a way that it is attached on an upper surface of an antenna carrier having a predetermined area and a predetermined height.

5. The electronic device of claim 1 , wherein the first antenna radiator is formed in a pattern on a substrate of the electronic device.

6. The electronic device of claim 1 , wherein a radiation pattern of the first antenna radiator that couples with the second antenna radiator is a radiation pattern operating in a global positioning system (GPS) band.

7. The electronic device of claim 1 , wherein the electronic device is one of a tablet personal computer (PC) and a mobile communication terminal.

8. An antenna device comprising:

a first antenna radiator configured to operate in at least one frequency band; and

at least one second antenna radiator independently disposed proximate to the first antenna radiator electrically coupled to at least one radiation pattern of the first antenna radiator, and configured to operate as a parasitic resonator,

wherein the at least one second antenna radiator is at least one of a metal vibrator, a motor, a metal tape, a portion of a shield can, a metal bushing having a predetermined area, and a metal bracket.

9. An electronic device comprising:

a housing comprising an interior region;

a substrate mounted in the interior region;

an antenna carrier installed on the substrate;

a main antenna radiator disposed on an upper surface of the antenna carrier, fed from the substrate, and configured to operate in at least one frequency band; and

a metal plate disposed at a position, which is spaced apart from the main antenna radiator, of the housing such that at least a portion of the metal plate is disposed in parallel with at least a portion of the main antenna radiator,

wherein the metal plate is electrically coupled to at least one radiation pattern of the main antenna radiator such that the metal plate operates as a parasitic resonator.

10. The electronic device of claim 9 , wherein the metal plate comprises at least part of a printed circuit board of flexibility comprising a metal pattern and a conductive tape.

11. The electronic device of claim 9 , wherein the metal plate is at least part of a metal vibrator, a motor, a metal tape, a shield can, a metal bushing having a predetermined area, and a metal bracket.

12. The electronic device of claim 9 , wherein a radiation pattern of the main antenna radiator that couples to the metal plate is a radiation pattern operating in a global positioning system (GPS) band.

13. The electronic device of claim 9 , wherein the metal plate is disposed in such a way that it is attached on an inner surface of the housing of the electronic device.

14. The electronic device of claim 9 , wherein the metal plate is insert-molded in the housing of the electronic device.

15. The electronic device of claim 14 , wherein the metal plate is insert-molded in such a way that it is exposed to an inner surface of the housing or exposed to an outer surface of the housing.

16. The electronic device of claim 15 , wherein when exposed to the outer surface of the housing, the metal plate is utilized as an ornament.