MOBILE TERMINAL

• US 20140078008A1
• Filed: 08/27/2013
• Published: 03/20/2014
• Est. Priority Date: 09/19/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: Sungjung Rho
• Inventors: Jung, Kangjae, Jung, Byungwoon, Rho, Sungjung, Kang, Yunmo, Hong, Sungjoon
• Granted Patent: US 9,871,286 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 5/35 using two or more simultaneously fed points
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00

Abstract

A mobile terminal comprises: a terminal body; and a first antenna device and a second antenna device disposed at one side of the terminal body in an adjacent manner, and formed to operate at different frequency bands, wherein the first antenna device and the second antenna device are provided with conductive members each having a slit at one side thereof, and wherein the conductive members form part of an appearance of the terminal body.

Claims

1. A mobile terminal, comprising:

a terminal body; and

a first antenna device and a second antenna device disposed at one side of the terminal body in an adjacent manner, and formed to operate at different frequency bands,

wherein the first antenna device and the second antenna device are provided with conductive members each having a slit at one side thereof, and

wherein the conductive members form part of an appearance of the terminal body.

2. The mobile terminal of claim 1, wherein the conductive members comprise a first conductive member having a first slit at one side thereof, and a second conductive member having a second slit at one side thereof,

wherein the first conductive member is included in the first antenna device and the second conductive member is included in the second antenna device.

3. The mobile terminal of claim 2, wherein the first antenna device comprises:

a third conductive member which forms a slot together with the first conductive member, such that the slot is communicated with the first slit;

a first feeding portion which forms an electric field in the slot such that the first antenna device resonates in a first frequency band; and

a first feeding extension portion extending from the first feeding portion such that the first antenna device resonates in a second frequency band.

4. The mobile terminal of claim 3, wherein a length of the slot, which is from a first connection part between the first conductive member and the third conductive member, to the first slit, is λ

/4 or λ

/8 with respect to a wavelength of a center frequency of the first frequency band.

5. The mobile terminal of claim 3, wherein the feeding portion is spaced from the first connection part by a first distance, and

wherein the feeding extension portion extends from the feeding portion by a second distance.

6. The mobile terminal of claim 5, wherein the first distance is formed such that an impedance of the center frequency of the first frequency band is within 50 ohm by the feeding portion, and

wherein the second distance is formed such that an impedance of a center frequency of the second frequency band is within 50 ohm by the feeding extension portion.

7. The mobile terminal of claim 3, wherein the third conductive member is implemented as a flexible printed circuit board (FPCB) having a ground, and the FPCB having one end connected to a circuit board mounted in the terminal body.

8. The mobile terminal of claim 3, wherein the second antenna device comprises:

a fourth conductive member which forms a slot together with the second conductive member, such that the slot is communicated with the second slit;

a second feeding portion which forms an electric field in the slot such that the second antenna device resonates in a third frequency band; and

a second feeding extension portion extending from the second feeding portion such that the second antenna device resonates in a fourth frequency band.

9. The mobile terminal of claim 8, wherein a length of the slot, which is from a second connection part between the second conductive member and the fourth conductive member, to the second slit, is λ

/4 or λ

/8 with respect to a wavelength of a center frequency of the third frequency band.

10. The mobile terminal of claim 8, wherein the fourth conductive member is implemented as a flexible printed circuit board (FPCB) having a ground, and the FPCB having one end connected to a circuit board mounted in the terminal body.

11. The mobile terminal of claim 2, wherein the first antenna device and the second antenna device are disposed below the terminal body, and

wherein a socket mounted in the terminal body and connectable to an external device is disposed between the first conductive member and the second conductive member.

12. The mobile terminal of claim 11, wherein the first slit and the second slit are formed to be open toward a lower end of the terminal body.

13. The mobile terminal of claim 2, wherein the first antenna device comprises:

a third member which forms a first conductive loop together with the first conductive member;

a first feeding portion connected to the first conductive loop so as to feed the first conductive loop; and

a first grounding connector connected to the first conductive loop so as to ground-connect the first conductive loop.

14. The mobile terminal of claim 13, wherein a length of the first conductive loop is λ

/2 or λ

/4 with respect to a wavelength of the center frequency of the first frequency band, such that the first antenna device operates as a folded dipole antenna.

15. The mobile terminal of claim 13, wherein the second antenna device comprises:

a fourth member which forms a second conductive loop together with the second conductive member;

a second feeding portion connected to the second conductive loop so as to feed the second conductive loop; and

a second grounding connector connected to the second conductive loop so as to ground-connect the second conductive loop.

16. The mobile terminal of claim 15, wherein a length of the second conductive loop is λ

/2 or λ

/4 with respect to a wavelength of the center frequency of the second frequency band, such that the second antenna device operates as a folded dipole antenna.

17. The mobile terminal of claim 2, wherein one of the antenna devices operates as a slot antenna.

18. The mobile terminal of claim 2, wherein one of the antenna devices operates as a folded dipole antenna.

19. The mobile terminal of claim 2, wherein non-conductive members are coupled to the slits so as to cover the slits.

20. A mobile terminal, comprising:

a conductive case which forms an appearance of a terminal body; and

a plurality of antenna devices disposed at one side of the terminal body in an adjacent manner, and formed to operate at different frequency bands,

wherein the antenna devices are provided with conductive members each having a slit at one side thereof, and

wherein the conductive members are implemented as part of the conductive case.

21. The mobile terminal of claim 20, wherein one of the antenna devices comprises:

a slot member which forms a slot together with the conductive member so as to be communicated with the slit;

a feeding portion which forms an electric field in the slot such that the antenna device resonates in a first frequency band; and

a feeding extension portion extending from the feeding portion such that the antenna device resonates in a second frequency band.

22. The mobile terminal of claim 21, wherein a length of the slot, which is from a connection part between the conductive member and the slot member, to the slit, is λ

/4 or λ

/8 with respect to a wavelength of a center frequency of the first frequency band.

23. The mobile terminal of claim 21, wherein the slot member is implemented as a flexible printed circuit board (FPCB) having a ground, and the FPCB having one end connected to a circuit board mounted in the terminal body.

24. The mobile terminal of claim 20, wherein one of the antenna devices comprises:

a loop member which forms a conductive loop together with the conductive member;

a feeding portion connected to the conductive loop so as to feed the conductive loop; and

a grounding connector connected to the conductive loop so as to ground-connect the conductive loop.

25. The mobile terminal of claim 24, wherein a length of the conductive loop is λ

/2 or λ

/4 with respect to a wavelength of the center frequency of the first frequency band, such that the antenna device operates as a folded dipole antenna.

26. The mobile terminal of claim 20, wherein non-conductive members are coupled to the slits so as to cover the slits.