Receiving antenna and wireless power receiving device including the same
A receiving antenna of a wireless power receiving device wirelessly charging electrical power according to an embodiment of the present invention includes a substrate, a soft magnetic layer stacked on the substrate, including a soft magnetic material, and having gaps at predetermined intervals, and a coil stacked on the soft magnetic layer and receiving electromagnetic energy emitted from a wireless power transmission device.
1. A receiving antenna of a wireless power receiving device wirelessly charging electrical power, the receiving antenna comprising:
a substrate;
a soft magnetic layer stacked on the substrate, including a soft magnetic material, and having gaps at predetermined intervals; and
a coil stacked on the soft magnetic layer, and configured to receive electromagnetic energy emitted from a wireless power transmission device,
wherein the coil is wound in a direction parallel to the soft magnetic layer on the soft magnetic layer, and at least a part of the coil disposed between two gaps is disposed in parallel with the two gaps,
wherein the soft magnetic layer includes a plurality of sub soft magnetic layers separated by the gaps,
wherein each sub soft magnetic layer has a stripe shape,
wherein the soft magnetic layer is a metallic ribbon, and
wherein the gaps are filled with an acrylate-based resin.
2. The receiving antenna of claim 1 , further comprising a support fixture which supports the soft magnetic layer and is disposed between the substrate and the soft magnetic layer.
3. The receiving antenna of claim 1 , wherein a width of each of the sub soft magnetic layers is one to fifty times a thickness of the soft magnetic layer.
4. The receiving antenna of claim 1 , wherein each of the sub soft magnetic layers is formed with a width of 0.02 mm to 5 mm.
5. The receiving antenna of claim 4 , wherein each of the sub soft magnetic layers is formed with a width of 0.02 mm to 1 mm.
6. The receiving antenna of claim 3 , wherein a width of the gap is 0.1 mm to 1 mm.
7. The receiving antenna of claim 1 , wherein the metallic ribbon is a nanocrystalline metallic ribbon.
8. The receiving antenna of claim 1 , wherein the plurality of sub soft magnetic layers are disposed on a same plane.
9. The receiving antenna of claim 1 , wherein the gap is formed in a shape of a broken line.
10. A wireless power receiving device wirelessly charging electrical power, comprising:
a substrate;
a soft magnetic layer stacked on the substrate, including a soft magnetic material, and having gaps at predetermined intervals;
a coil stacked on the soft magnetic layer, and configured to receive electromagnetic energy emitted from a wireless power transmission device;
a circuit unit connected to the coil, and configured to convert the electromagnetic energy into electrical energy; and
a storage unit configured to store the electrical energy,
wherein the coil is wound in a direction parallel to the soft magnetic layer on the soft magnetic layer, and at least a part of the coil disposed between two gaps is disposed in parallel with the two gaps,
wherein the soft magnetic layer includes a plurality of sub soft magnetic layers separated by the gaps,
wherein each sub soft magnetic layer has a stripe shape,
wherein the soft magnetic layer is a metallic ribbon, and
wherein the gaps are filled with an acrylate-based resin.
11. The wireless power receiving device of claim 10 , wherein the gap is formed in a shape of a broken line.
12. The wireless power receiving device of claim 10 , wherein a width of the gap is 0.1 mm to 1 mm.