Combo antenna unit and wireless power receiving module comprising same
Provided are a combo antenna unit, and a wireless power receiving module including the same. The combo antenna unit includes a wireless power transmission antenna and at least one additional antenna using a different frequency band from the wireless power transmission antenna. The wireless power transmission antenna includes a radiator formed of a loop-shape-wound flat coil. According to the present invention, it is possible to reduce resistance so as to decrease heat generation and increase charging efficiency, and minimize the amount of circuit board used, thereby reducing overall production costs.
1. A combo antenna unit comprising:
a wireless power transmission antenna and at least one additional antenna using a different frequency band from the wireless power transmission antenna,
wherein the wireless power transmission antenna includes a radiator formed of a loop-shape-wound flat coil,
wherein the additional antenna includes one or both of a magnetic secure transmission (MST) antenna and a near field communication (NFC) antenna,
wherein the MST antenna or the NFC antenna includes a radiator formed of a loop-shape-wound flat coil, and a surface of the radiator is attached to a shielding unit,
wherein the additional antenna includes an MST antenna and an NFC antenna, wherein the MST antenna includes a radiator formed of a loop-shape-wound flat coil, and wherein the NFC antenna includes a radiator formed of a printed pattern on a circuit board which is attached to a surface of a shielding unit.
2. The combo antenna unit of claim 1 , wherein the additional antenna includes an MST antenna and an NFC antenna, and each of the MST antenna and the NFC antenna includes a radiator formed of a printed pattern on a circuit board which is attached to a surface of the shielding unit.
3. The combo antenna unit of claim 2 , wherein the circuit board includes a through-hole with a predetermined area formed in a region corresponding to the flat coil, and the flat coil is disposed in the through-hole and directly attached to a surface of the shielding unit.
4. The combo antenna unit of claim 2 , wherein the flat coil and the circuit board are disposed in parallel on the same plane.
5. A wireless power receiving module comprising:
a combo antenna unit including a wireless power transmission antenna and at least one additional antenna using a different frequency band from the wireless power transmission antenna, and
a shielding unit disposed on a surface of the combo antenna unit and shielding a magnetic field to condense the magnetic field in a desired direction,
wherein the wireless power transmission antenna includes a radiator formed of a loop-shape-wound flat coil,
wherein the additional antenna includes one or both of a magnetic secure transmission (MST) antenna and a near field communication (NFC) antenna,
wherein the MST antenna or the NFC antenna includes a radiator formed of a loop-shape-wound flat coil, and a surface of the radiator is attached to a shielding unit,
wherein the additional antenna includes the MST antenna and the NFC antenna, and each of the MST antenna and the NFC antenna includes a radiator formed of a printed pattern on a circuit board which is attached to a surface of the shielding unit.
6. The wireless power receiving module of claim 5 , wherein the additional antenna includes the MST antenna and the NFC antenna, wherein the MST antenna incudes a radiator formed of a loop-shape-wound flat coil, and wherein the NFC antenna includes a radiator formed of a printed pattern on a circuit board, which is attached to a surface of the shielding unit.
7. The wireless power receiving module of claim 5 , wherein the circuit board includes a through-hole with a predetermined area formed in a region corresponding to the flat coil, and the flat coil is disposed in the through-hole and directly attached to a surface of the shielding unit.
8. The wireless power receiving module of claim 5 , wherein the shielding unit includes a first region and a second region divided by a virtual straight line as boundary, wherein the flat coil is attached to the first region, and the circuit board is attached to the second region.
9. The wireless power receiving module of claim 5 , wherein the flat coil includes a pair of connection terminals at both ends for electrical connection, and the shielding unit includes a receiving portion, in which a lead portion including the connection terminals is disposed, on a surface of the shielding unit.
10. The wireless power receiving module of claim 9 , wherein the receiving portion is a receiving recess which is dented by a predetermined depth from a surface of the shielding unit, and the lead portion is inserted in the receiving recess.
11. The wireless power receiving module of claim 9 , wherein the receiving portion is an incision portion which is incision-formed on an inner side of the shielding unit, and the lead portion is inserted in the incision portion.
12. The wireless power receiving module of claim 8 , wherein the shielding unit includes a first sheet for improving performance of the wireless power transmission antenna and a second sheet for improving performance of the NFC antenna, wherein the first sheet is disposed in the first region and the second sheet is disposed in the second region.
13. The wireless power receiving module of claim 12 , wherein the first sheet and the second sheet are arranged such that ends of the first sheet and the second sheet abut against each other on the same plane.
14. The wireless power receiving module of claim 12 , wherein the first sheet is a ribbon sheet including at least one of an amorphous alloy and a nanocrystalline alloy, and the second sheet is a ferrite sheet.