Antenna device and portable terminal including the same
An antenna device includes a first wiring may include a spiral shape forming an empty region therein, and a second wiring disposed inside or outside of the first wiring. The second wiring is disposed to be spaced apart from the first wiring, and includes a first ring-shaped wiring and a second ring-shaped wiring, which are concentric to each other.
1. An antenna device, comprising:
a coil part having an antenna wiring, the antenna wiring including a first wiring comprising a spiral shape forming an empty region therein and a second wiring disposed inside or outside of the first wiring;
a magnetic part comprising a flat plate shape disposed on one side of the coil part and connected to the coil part to provide a magnetic path of a magnetic field generated by the antenna wiring of the coil part;
wherein the second wiring is disposed to be spaced apart from the first wiring, and comprises a first ring-shaped wiring and a second ring-shaped wiring, which are concentric to each other; and
wherein the first ring-shaped wiring and the second ring-shaped wiring are formed to be circular.
2. The antenna device of claim 1 , wherein second wirings are disposed inside of the first wiring.
3. The antenna device of claim 1 , wherein the second wiring further comprises a connection wiring connecting the first ring-shaped wiring to the second ring-shaped wiring.
4. The antenna device of claim 1 , wherein the first ring-shaped wiring and the second ring-shaped wiring are each formed in an arc shape having two ends.
5. The antenna device of claim 4 , wherein the second wiring comprises a first connection wiring connecting one end of the first ring-shaped wiring to one end of the second ring-shaped wiring.
6. The antenna device of claim 5 , wherein the second wiring comprises a second connection wiring connecting another end of the first ring-shaped wiring to another end of the second ring-shaped wiring.
7. The antenna device of claim 5 , wherein the two ends of the first ring-shaped wiring is aligned with the two ends of the second ring-shaped wiring so that a disconnected portion of the first ring-shaped wiring is disposed to correspond to a disconnected portion of the second ring-shaped wiring.
8. The antenna device of claim 1 , further comprising:
a coil wiring disposed inside or outside of the first wiring and configured to perform wireless power transmission.
9. The antenna device of claim 1 , further comprising:
a third wiring disposed inside or outside of the first wiring and configured to perform magnetic secure transmission (MST).
10. The antenna device of claim 1 , wherein a distance between the first ring-shaped wiring and the second ring-shaped wiring is 400 μm or less.
11. The antenna device of claim 1 , wherein the first wiring is configured to perform as a near field communication (NFC) antenna or a magnetic resonance wireless charging coil.
12. The antenna device of claim 1 , wherein the first wiring and the second wiring are formed as a circuit pattern on an insulating substrate, and
the first ring-shaped wiring and the second ring-shaped wiring are disposed on one surface of the insulating substrate.
13. The antenna device of claim 1 , wherein the second wiring is disposed within a range of a magnetic field formed by the first wiring.
14. The antenna device of claim 1 , wherein the coil part is configured to concentrate a magnetic flux by generating the magnetic field utilizing a capacitance generated between the first and the second ring-shaped wirings.
15. A portable terminal, comprising:
a terminal body;
a coil part having an antenna wiring, the antenna wiring including a first wiring comprising a spiral shape electrically connected to the terminal body and a second wiring disposed inside or outside of the first wiring; and
a magnetic part comprising a flat plate shape disposed on one side of the coil part and connected to the coil part to provide a magnetic path of a magnetic field generated by the antenna wiring of the coil part,
wherein the first ring-shaped wiring and the second ring-shaped wiring are formed to be circular, and
wherein the second wiring includes a pair of ring-shaped wirings being concentric and comprising different diameters.
16. The portable terminal of claim 15 , wherein the pair of ring-shaped wirings are disposed on a same plane.
17. The portable terminal of claim 15 , wherein the second wiring is disconnected from the terminal body.