Antenna assembly and portable terminal having the same

Abstract

An antenna assembly, and a portable terminal having the same. The antenna assembly according to an embodiment comprises: a circuit board having a ground plane at a predetermined region; first and second antenna conductors spaced from each other at one side of the ground plane; and a shielding wall disposed between the ground plane and the antenna conductors, for reducing a coupling between the first and second antenna conductors. Since a plurality of antennas are mounted at a small space inside the portable terminal with maintaining their functions, an isolation characteristic between the antennas is enhanced, and a mutual coupling between the antennas is minimized.

What is claimed is: 
     
       1. An antenna assembly, comprising:
 a circuit board having a ground plane at a predetermined region; 
 first and second antenna conductors spaced from each other at one side of the ground plane; and 
 a shielding wall disposed between the ground plane and the first and second antenna conductors, for reducing a coupling between the first and second antenna conductors, 
 wherein the shielding wall is formed of a sheet having a conductivity or is coated with a conductive material, 
 wherein each of the first and second antenna conductors respectively comprises a first pattern portion having a first height from the ground plane and a second pattern portion having a second height higher than the first height, and 
 wherein the first and second pattern portions are connected to each other. 
 
     
     
       2. The antenna assembly of  claim 1 , wherein the shielding wall substantially forms an angle of 90° from the ground plane. 
     
     
       3. The antenna assembly of  claim 1 , wherein each of the first and second antenna conductors respectively comprises:
 a first pattern portion having a first height from the ground plane; and   a second pattern portion having a second height higher than the first height   wherein the first and second pattern portions are connected to each other.   
     
     
       4. The antenna assembly of claim  3  1, wherein the second pattern portion of the first antenna conductor and the second pattern portion of the second antenna conductor are electrically connected to each other. 
     
     
       5. The antenna assembly of  claim 4 , wherein each of the first and second antenna conductors comprises a feeding portion for feeding signals to the circuit board, and 
 wherein the feeding portion is connected to the first pattern portion. 
 
     
     
       6. The antenna assembly of claim  3 1, wherein the first and second antenna conductors are formed to be substantially symmetrical to each other. 
     
     
       7. The antenna assembly of claim  6  5, wherein each of the first and second antenna conductors further comprise a ground connecting portion for connecting the first and second antenna conductors to the ground plane, and 
 wherein the ground connecting portion is disposed at a connection part between the second pattern portion of the first antenna conductor and the second pattern portion of the second antenna conductor. 
 
     
     
       8. The antenna assembly of  claim 7 , wherein a capacitance element is further disposed between the ground connecting portion of the first antenna conductor and the ground connecting portion of the second antenna conductor, and an inductance element is further disposed between the shielding wall and the first and second antenna conductors and the shielding wall. 
     
     
       9. A portable terminal, comprising:
 a case; and 
 an antenna assembly mounted in the case and implementing a mobile communication service, and 
 wherein the antenna assembly comprises: 
 a circuit board having a ground plane at a predetermined region; 
 first and second antenna conductors spaced from each other at one side of the ground plane; and 
 a shielding wall disposed between the ground plane and the first and second antenna conductors, for reducing a coupling between the first and second antenna conductors, 
 wherein the shielding wall is formed of a sheet having a conductivity or is coated with a conductive material, and 
 wherein the shielding wall is formed as an EMI (electromagnetic interference) material deposited on a rib protruding from an inner surface of the case. 
 
     
     
       10. The portable terminal of  claim 9 , wherein the shielding wall substantially forms an angle of 90° from the ground plane. 
     
     
       11. The portable terminal of  claim 9 , wherein the shielding wall is formed as an EMI (electromagnetic interference) material deposited on a rib protruding from an inner surface of the case. 
     
     
       12. The portable terminal of  claim 9 , wherein the shielding wall is formed as a dielectric carrier for supporting the first and second antenna conductors. 
     
     
       13. The portable terminal of  claim 9 , wherein the shielding wall is formed as a shielding can for shielding RF components of the circuit board. 
     
     
       14. The portable terminal of  claim 9 , wherein each of the first and second antenna conductors respectively comprises:
 a first pattern portion having a first height from the ground plane; and 
 a second pattern portion having a second height higher than the first height, and 
 wherein the first and second pattern portions are connected to each other. 
 
     
     
       15. The portable terminal of  claim 14 , wherein the second pattern portion of the first antenna conductor and the second pattern portion of the second antenna conductor are electrically connected to each other. 
     
     
       16. The portable terminal of  claim 14 , wherein the first and second antenna conductors are formed to be substantially symmetrical to each other. 
     
     
       17. The portable terminal of  claim 16 , wherein each of the first and second antenna conductors comprise a feeding portion for feeding signals to the circuit board, and 
 wherein the feeding portion is connected to the first pattern portion. 
 
     
     
       18. The portable terminal of  claim 16 , wherein each of the first and second antenna conductors further comprise a ground connecting portion for connecting the first and second antenna conductors to the ground plane, and 
 wherein the ground connecting portion is disposed at a connection part between the second pattern portion of the first antenna conductor and the second pattern portion of the second antenna conductor. 
 
     
     
       19. The portable terminal of  claim 18 , wherein a capacitance element is further disposed between the ground connecting portion of the first antenna conductor and the ground connecting portion of the second antenna conductor, and an inductance element is further disposed between the shielding wall and the first and second antenna conductors. 
     
     
       20. An antenna assembly, comprising:
 a circuit board having a ground plane at a predetermined region;   first and second antenna conductors spaced from each other at one side of the ground plane; and   a shielding wall disposed between the ground plane and the first antenna conductor and between the ground plane and the second antenna conductor, for reducing a coupling between the first and second antenna conductors,   
     
     
       21. A portable terminal, comprising:
 a case; and   an antenna assembly mounted in the case and implementing a mobile communication service,   wherein the antenna assembly comprises:   a circuit board having a ground plane at a predetermined region;   first and second antenna conductors spaced from each other at one side of the ground plane; and   a shielding wall disposed between the ground plane and the first antenna conductor and between the ground plane and the second antenna conductor, for reducing a coupling between the first and second antenna conductors.   
     
     
       22. An antenna assembly, comprising:
 a printed circuit board;   at least one antenna radiation unit disposed next to the printed circuit board; and   a shielding surface disposed between the printed circuit board and the at least one antenna radiation unit so as to reduce an interference between the printed circuit board and the at least one antenna radiation unit,   wherein at least a portion of the shielding surface comprises a conductive material,   wherein the shielding surface is formed to be substantially perpendicular to the printed circuit board, and   wherein the printed circuit board is installed in a first outer casing among two outer casing enclosing the printed circuit board and the at least one antenna radiation unit.   
     
     
       23. The antenna assembly of claim 22, wherein the printed circuit board has a rectangular shape and one side of the printed circuit board where the at least one antenna radiation unit is disposed is a shorter side of the rectangular shape. 
     
     
       24. The antenna assembly of claim 22, wherein the shielding surface is a barrier rib. 
     
     
       25. The antenna assembly of claim 24, wherein the barrier rib includes an EMI (Electromagnetic interference) material. 
     
     
       26. The antenna assembly of claim 22, wherein the at least one antenna radiation unit includes first and second antenna conductors. 
     
     
       27. The antenna assembly of claim 26, wherein the first and second conductors are separated from each other until connecting together at a connection point. 
     
     
       28. A mobile terminal, comprising:
 a wireless communication unit configured to wirelessly communicate with at least one other terminal;   a display configured to display information;   a printed circuit board;   at least one antenna radiation unit disposed next to the printed circuit board; and   a shielding surface disposed between the printed circuit board and the at least one antenna radiation unit so as to reduce an interference between the printed circuit board and the at least one antenna radiation unit,   wherein at least a portion of the shielding surface comprises a conductive material,   wherein the shielding surface is formed to be substantially perpendicular to the printed circuit board,   wherein the at least one antenna radiation unit includes first and second antenna conductors, and   wherein the first and second antenna conductors are separated from each other until connecting together at a connection point.   
     
     
       29. The mobile terminal of claim 28, wherein the printed circuit board has a rectangular shape and one side of the printed circuit board where the at least one antenna radiation unit is disposed is a shorter side of the rectangular shape. 
     
     
       30. The mobile terminal of claim 28, wherein the shielding surface is a barrier rib. 
     
     
       31. The mobile terminal of claim 30, wherein the barrier rib includes an EMI (Electromagnetic interference) material. 
     
     
       32. A mobile terminal, comprising:
 a circuit board;   a ground plane;   a first conductive antenna and a second conductive antenna; and   a conductive wall disposed between the ground plane and the first antenna and between the ground plane and the second antenna,   wherein the conductive wall directly contacts the ground plane and is perpendicular to the first and the second antennas.   
     
     
       33. The mobile terminal of claim 32, wherein the circuit board has a rectangular shape and one side of the circuit board where the first and second conductive antennas are disposed is a shorter side of the rectangular shape. 
     
     
       34. The mobile terminal of claim 32, wherein the conductive wall includes an EMI (Electromagnetic interference) material. 
     
     
       35. The mobile terminal of claim 32, wherein the circuit board is installed in a first outer casing among two outer casings enclosing the circuit board and the first and second conductive antennas. 
     
     
       36. The mobile terminal of claim 32, wherein the first and second conductive antennas are separated from each other until connecting together at a connection point. 
     
     
       37. A mobile terminal, comprising:
 a ground plane;   first and second antenna conductors disposed next to the ground plane;   a connecting portion configured to electrically connect the first and second antenna conductors to each other; and   a conductive wall disposed between the ground plane and the first antenna conductor and between the ground plane and the second antenna conductor,   wherein the conductive wall is formed to be substantially perpendicular to the ground plane.   
     
     
       38. The mobile terminal of claim 37, wherein the conductive wall directly contacts the ground plane. 
     
     
       39. The mobile terminal of claim 37, wherein the ground plane is disposed next to the conductive wall and spaced apart from the first and second antenna conductors with interposing the conductive wall therebetween. 
     
     
       40. The mobile terminal of claim 37, wherein the ground plane is disposed between the first and second antenna conductors. 
     
     
       41. The mobile terminal of claim 37, further comprising a printed circuit board having the ground plane at a predetermined region. 
     
     
       42. The mobile terminal of claim 37, wherein the conductive wall extends along the widthwise direction of the mobile terminal. 
     
     
       43. The mobile terminal of claim 37, wherein each of the first and second antenna conductors has a folded portion. 
     
     
       44. A mobile terminal, comprising:
 a wireless communication unit configured to wirelessly communicate with at least one other terminal;   a display configured to display information;   a printed circuit board;   at least one antenna radiation unit disposed next to the printed circuit board; and   a shielding surface disposed between the printed circuit board and the at least one antenna radiation unit so as to reduce an interference between the printed circuit board and the at least one antenna radiation unit,   wherein at least a portion of the shielding surface comprises a conductive material,   wherein the shielding surface is formed to be substantially perpendicular to the printed circuit board, and   wherein the printed circuit board is installed in a first outer casing among two outer casings enclosing the printed circuit board and the at least one antenna radiation unit.   
     
     
       45. A mobile terminal, comprising:
 a ground plane;   first and second antenna conductors disposed next to the ground plane;   a conductive wall disposed between the ground plane and the first antenna conductor and between the ground plane and the second antenna conductor; and   first and second housings enclosing the ground plane,   wherein the conductive wall is formed to be substantially perpendicular to the ground plane and is configured to protrude from the first or second housing.   
     
     
       46. A mobile terminal, comprising:
 a ground plane;   first and second antenna conductors disposed next to the ground plane; and   a conductive wall disposed between the ground plane and the first antenna conductor and between the ground plane and the second antenna conductor; and   first and second housings enclosing the ground plane,   wherein the conductive wall is formed to be substantially perpendicular to the ground plane, and   wherein at least one of the first and second antenna conductors has a folded portion formed along an edge of the first or second housing.