Internal antenna of mobile communication terminal

1. An internal antenna for a mobile communication terminal, said antenna comprising:

a dielectric support unit for supporting the antenna;

a power feed unit for feeding power to the antenna;

a ground unit for grounding the antenna;

a first radiation unit formed in a band shape with a designated width, having one end connected to the power feed unit and another end connected to the ground unit arranged along an edge of an upper surface of the dielectric support unit so as to form a loop-shaped current path, and radiating at a designated low frequency band when a current is introduced to the power feed unit; and

a second radiation unit formed in a band shape with a designated width, connected to an inner side of a left radiation unit of the first radiation unit, arranged on the upper surface of the dielectric support unit, and radiating at a designated high frequency band when the current is introduced to the power feed unit.

2. The internal antenna as set forth in claim 1 , wherein the power feed unit or the ground unit is arranged at an end of a side surface of the dielectric support unit.

3. The internal antenna as set forth in claim 1 , wherein

the dielectric support unit ham an approximately hexahedral shape, and

the first radiation unit is divided into the left radiation unit, an upper radiation unit, a right radiation unit and a lower radiation unit according to their positions arranged on the upper surface of the dielectric support unit.

4. The internal antenna as set forth in claim 1 , wherein the left, upper and right radiation units of the first radiation unit are extended such that their extended portions are arranged on a rear surface of the dielectric support unit.

5. The internal antenna as set forth in claim 1 , wherein the left, upper and right radiation units of the first radiation unit are extended such that their extended portions are arranged on rear and lower surfaces of the dielectric support unit.

6. The internal antenna as set forth in claim 1 , wherein the upper, right and lower radiation units of the first radiation unit are extended such that their extended portions are arranged on a right side surface or a lower surface of the dielectric support unit.

7. The internal antenna as set forth in claim 6 , wherein the second radiation unit is extended such that its extended portion is arranged on the right side surface of the dielectric support unit.

8. The internal antenna as set forth in claim 1 , wherein the mobile communication terminal is a folder-type terminal.

9. The internal antenna as set forth in claim 1 , further comprising a third radiation unit formed in a band shape with a designated width, connected to an outer side of the left radiation unit of the first radiation unit, arranged on a left side surface or a lower surface of the dielectric support unit, and radiating at a designated high frequency band when the current is introduced to the power feed unit.

10. The internal antenna as set forth in claim 9 , further comprising a frequency adjustment unit formed in a band shape with a designated width, and connected to an outer side of the first radiation unit for adjusting a frequency to be processed by the antenna so as to control impedance matching.

11. The internal antenna as set forth in claim 10 , wherein the frequency adjustment unit is connected to an outer side of a lower radiation unit of the first radiation unit and arranged along a front surface or the lower surface of the dielectric support unit.

12. The internal antenna as set forth in claim 11 , wherein the frequency adjustment unit is bent at a designated position of the lower surface of the dielectric support unit toward a right side surface of the dielectric support unit.

13. An internal antenna for a mobile communication terminal, said antenna comprising:

a dielectric support unit far supporting the antenna;

a power feed unit for feeding power to the antenna;

a ground unit for grounding the antenna;

a first radiation unit formed in a band shape with a designated width, having one end connected to the power feed unit and another end connected to the ground unit, arranged along an edge of an under surface of the dielectric support unit so as to form a loop-shared current path, and radiating at a designated low frequency band when a current is introduced to the power feed unit; and

a further radiation unit formed in a band shape with a designated width, connected to an outer side of a left radiation unit of the first radiation unit, arranged on a left side surface or a lower surface of the dielectric support unit, and radiating at a designated high frequency band when the current is introduced to the power feed unit.

14. The internal antenna as set forth in claim 13 , further comprising a frequency adjustment unit formed in a band shape with a designated width, and connected to an outer side of the first radiation unit for adjusting a frequency to be processed by the antenna so as to control impedance matching.

15. The internal antenna as set forth in claim 14 , wherein the frequency adjustment unit is connected to an outer side of a lower radiation unit of the first radiation unit and arranged along a front surface or the lower surface of the dielectric support unit.

16. The internal antenna as set forth in claim 15 , wherein the frequency adjustment unit is bent at a designated position of the lower surface of the dielectric support unit toward a right side surface of the dielectric support unit.

17. An internal antenna for a communication terminal, said antenna comprising:

a dielectric support;

a power terminal formed on the dielectric support for providing power to the antenna;

a ground terminal formed on the dielectric support for grounding the antenna;

a first, elongated radiation element resonating at a first frequency band when the antenna is powered via said power terminal, wherein said first radiation element is formed on said dielectric support and has opposite ends connected to the power and ground terminals to form a current path between said terminals, said current path having a shape of an open loop; and

a second, elongated radiation element resonating at a second frequency band higher than the first frequency band when the antenna is powered via said power terminal, wherein said second radiation element is a branch connected to a middle section of said open loop of said first radiation element.

18. The internal antenna as set forth in claim 17 , wherein

the dielectric support has an approximately hexahedral shape with upper, lower, right side, left side, front and rear faces;

said open loop of said first radiation element and said second radiation element are completely positioned on the upper face of said dielectric support; and

said second radiation element extends inwardly of said open loop.

19. The internal antenna as set forth in claim 17 , wherein

the dielectric support has an approximately hexahedral shape with upper, lower, right side, left side, front and rear surfaces;

said open loop of said first radiation element is formed on at least two adjacent ones of said faces; and

said second radiation element is farmed on at least one of said at least two adjacent faces.

20. The internal antenna as set forth in claim 17 , wherein

the dielectric support has an approximately hexahedral shape with upper, lower, right side, left side, front and rear surfaces; and

said open loop of said first radiation element and said second radiation element are not coexistent on any of said faces.

21. The internal antenna as set forth in claim 20 , further comprising an elongated, frequency adjustment element connected to said first radiation element for adjusting a frequency to be processed by the antenna so as to control impedance matching.