Antenna unit and wireless power transmission module including same

1. An antenna unit comprising:

a circuit board; and

a first antenna pattern formed on a surface of the circuit board for wireless power transmission and formed of a single conductor including a plurality of windings; wherein the single conductor has a different line width depending on position,

wherein a line width of an outermost winding of the first antenna pattern formed at an outermost portion of the circuit board is larger than a line width of an innermost winding of the first antenna pattern formed at an innermost portion of the circuit board,

wherein a line width of an intermediate winding of the first antenna pattern between the outermost winding and the innermost winding is gradually decreased as going toward the innermost winding,

wherein at least one of the intermediate windings have a larger line width than that of the outermost winding,

wherein a line width of the first antenna pattern is gradually increased as going from the outermost winding to the intermediate winding, and a line width of the first antenna pattern is gradually decreased as going from the intermediate winding to the innermost winding.

2. The antenna unit of claim 1 , wherein the circuit board is made from a flexible material.

3. The antenna unit of claim 1 , wherein the first antenna pattern includes at least two windings having the same line width, which are adjacent to each other.

4. The antenna unit of claim 3 , wherein remaining windings of the first antenna pattern except for the innermost winding are divided into a first half windings and a second half windings so that the first half windings have a same first line width and the second half windings have a same second line width.

5. The antenna unit of claim 1 , wherein the first antenna pattern includes at least two of the intermediate windings, which are adjacent to each other, having a larger line width than that of the outermost winding.

6. The antenna unit of claim 1 , wherein the first antenna pattern is disposed in an area of which center is away from a center of the circuit board.

7. The antenna unit of claim 6 , wherein at least one of a left portion, a right portion, an upper portion, and a lower portion of the first antenna pattern have a different line width from that of the other portions.

8. The antenna unit of claim 1 , wherein the antenna unit further includes at least one second antenna pattern formed outside the first antenna pattern on the circuit board for wireless communication.

9. An antenna unit comprising:

a circuit board;

a first antenna pattern formed on one surface of the circuit board for wireless charging, including a single conductor of which is formed a plurality of windings; and

a second antenna pattern formed on the other surface of the circuit board, including a plurality of conductors each of which is formed of a single winding;

wherein both ends of each of the plurality of conductors are connected in parallel to each of the plurality of windings of the first antenna pattern through via holes, and

wherein the plurality of conductors has different line widths from each other,

wherein a line width of an outermost winding of the first antenna pattern formed at an outermost portion of the circuit board is larger than a line width of an innermost winding of the first antenna pattern formed at an innermost portion of the circuit board,

wherein a line width of an intermediate winding of the first antenna pattern between the outermost winding and the innermost winding is gradually decreased as going toward the innermost winding,

wherein at least one of the intermediate windings have a larger line width than that of the outermost winding,

wherein a line width of the first antenna pattern is gradually increased as going from the outermost winding to the intermediate winding, and a line width of the first antenna pattern is gradually decreased as going from the intermediate winding to the innermost winding.

10. The antenna unit of claim 9 , wherein the antenna unit further includes at least one third antenna pattern formed outside the first antenna pattern on the circuit board for wireless communication.

11. A wireless power transmission module comprising;

an antenna unit including a circuit board; and a first antenna pattern formed on a surface of the circuit board for wireless power transmission and formed of a single conductor including a plurality of windings, wherein the single conductor has a different line width depending on position;

a shielding unit disposed on one surface of the antenna unit and configured to shield a magnetic field,

wherein a line width of an outermost winding of the first antenna pattern formed at an outermost portion of the circuit board is larger than a line width of an innermost winding of the first antenna pattern formed at an innermost portion of the circuit board,

wherein a line width of an intermediate winding of the first antenna pattern between the outermost winding and the innermost winding is gradually decreased as going toward the innermost winding,

wherein at least one of the intermediate windings have a larger line width than that of the outermost winding,

wherein a line width of the first antenna pattern is gradually increased as going from the outermost winding to the intermediate winding, and a line width of the first antenna pattern is gradually decreased as going from the intermediate winding to the innermost winding.

12. The wireless power transmission module of claim 11 , wherein the shielding unit includes any one of a ribbon sheet made from an amorphous alloy or a nanocrystal alloy, a ferrite sheet, and a polymer sheet.

13. The wireless power transmission module of claim 11 , wherein the shielding unit is a form including a plurality of divided fine pieces.

14. The wireless power transmission module of claim 13 , wherein the plurality of divided fine pieces is totally or partially insulated from each other.

15. A wireless power transmission module comprising;

an antenna unit including a circuit board; a first antenna pattern formed on one surface of the circuit board for wireless charging, including a single conductor of which is formed a plurality of windings; and a second antenna pattern formed on the other surface of the circuit board, including a plurality of conductors each of which is formed of a single winding; and

a shielding unit disposed on one surface of the antenna unit and configured to shield a magnetic field,

wherein both ends of each of the plurality of conductors are connected in parallel to each of the plurality of windings of the first antenna pattern through via holes, and the plurality of conductors has different line widths from each other,

wherein a line width of an outermost winding of the first antenna pattern formed at an outermost portion of the circuit board is larger than a line width of an innermost winding of the first antenna pattern formed at an innermost portion of the circuit board,

wherein a line width of an intermediate winding of the first antenna pattern between the outermost winding and the innermost winding is gradually decreased as going toward the innermost winding,

wherein at least one of the intermediate windings have a larger line width than that of the outermost winding,

wherein a line width of the first antenna pattern is gradually increased as going from the outermost winding to the intermediate winding, and a line width of the first antenna pattern is gradually decreased as going from the intermediate winding to the innermost winding.

16. The wireless power transmission module of claim 15 , wherein the shielding unit includes any one of a ribbon sheet made from an amorphous alloy or a nanocrystal alloy, a ferrite sheet, and a polymer sheet.

17. The wireless power transmission module of claim 15 , wherein the shielding unit is a form including a plurality of divided fine pieces.