Wireless antenna for wireless charging and NFC communication and wireless terminal to which same is applied
A wireless antenna includes a wireless communication antenna including a first wireless communication coil and a second wireless communication coil; and a wireless charging antenna comprising a wireless charging coil. Further, the wireless charging coil is disposed inside the first wireless communication coil, and the second wireless communication coil is disposed inside the wireless charging coil.
1. A wireless antenna comprising:
a wireless communication antenna comprising a first wireless communication coil and a second wireless communication coil; and
a wireless charging antenna comprising a wireless charging coil,
wherein the wireless charging coil is disposed inside the first wireless communication coil, and the second wireless communication coil is disposed inside the wireless charging coil, and
wherein a width of a winding of the second wireless communication coil is less than a width of a winding of the first communication coil.
2. The wireless antenna according to claim 1 , wherein the first wireless communication coil has a substantially rectangular shape, and the second wireless communication coil has a substantially circular shape.
3. The wireless antenna according to claim 1 , wherein the first wireless communication coil and the second wireless communication coil have a different numbers of windings.
4. The wireless antenna according to claim 3 , wherein the number of windings of the second wireless communication coil is one.
5. The wireless antenna according to claim 3 , wherein the number of windings of the first wireless communication coil is greater than the number of windings of the second wireless communication coil.
6. The wireless antenna according to claim 3 , wherein a number of windings of the wireless charging coil is greater than the number of windings of the first wireless communication coil.
7. The wireless antenna according to claim 1 , wherein the wireless communication antenna comprises a coil connection member configured to interconnect the first wireless communication coil and the second wireless communication coil.
8. The wireless antenna according to claim 7 , wherein the coil connection member overlaps the wireless charging coil.
9. The wireless antenna according to claim 1 , wherein the first wireless communication coil and the second wireless communication coil are connected to each other in series, and
wherein the first wireless communication coil and the second wireless communication coil are wound so as to have a same current rotation direction.
10. The wireless antenna according to claim 1 , wherein the wireless communication antenna and the wireless charging antenna are formed on a flexible printed circuit board.
11. The wireless antenna according to claim 10 , wherein the flexible printed circuit board comprises a connector connected to the wireless communication antenna and to the wireless charging antenna.
12. The wireless antenna according to claim 3 , wherein a number of windings of the wireless charging coil is greater than the number of windings of the second wireless communication coil.
13. The wireless antenna according to claim 1 , wherein a diameter of an innermost coil of the second wireless communication coil is at least one and a half times as large as a distance between an innermost turn of the wireless charging coil and an outermost turn of the wireless charging coil.
14. The wireless antenna according to claim 1 , further comprising:
a coil periphery member on which the wireless charging coil is disposed.
15. The wireless antenna according to claim 14 , wherein a portion of the first wireless communication coil is disposed outside the coil periphery member.
16. The wireless antenna according to claim 14 , wherein the coil periphery member has a substantially larger area than an area of the wireless charging coil.
17. The wireless antenna according to claim 14 , wherein the coil periphery member outwardly extends beyond an outer boundary of the wireless charging coil, and the coil periphery member inwardly extends beyond an inner boundary of the wireless charging coil.
18. The wireless antenna according to claim 14 , wherein the coil periphery member includes a notched portion disposed adjacent to an inner corner of the first wireless communication coil, a portion of the notched portion being located outside of the wireless charging coil and without overlapping the wireless charging coil.
19. The wireless antenna according to claim 14 , wherein the coil connection member overlaps the coil periphery member.
20. The wireless antenna according to claim 14 , wherein the second wireless communication coil is disposed inside the coil periphery member.
21. The wireless antenna according to claim 14 , wherein the coil periphery member extends beyond an outermost edge of the wireless charging coil without overlapping with the portion of the first wireless communication coil.
22. The wireless antenna according to claim 14 , wherein an inner corner of the first wireless communication coil is spaced apart from the coil periphery member.
23. The wireless antenna according to claim 18 , wherein the portion of the notched portion is disposed between an outermost turn of the first wireless communication coil and an outermost turn of the wireless charging coil.
24. The wireless antenna according to claim 18 , wherein the notched portion only extends partially into the coil periphery member without extending all the way through the coil periphery member.