Antenna module for near field communication
Embodiments of the invention provide an antenna module for NFC. According to at least one embodiment, the antenna module includes an antenna sheet patterned with a loop coil of a conductive metal material, a magnetic shielding sheet comprising a metal sheet, which is embedded in a magnetic sheet, and an adhesive film interposed between the antenna sheet and the magnetic shielding sheet.
1. An antenna module comprising:
an antenna sheet patterned with a loop coil of a conductive metal material;
a magnetic shielding sheet comprising a metal sheet, which is embedded in a ferrite sheet; and
an adhesive film interposed between the antenna sheet and the magnetic shielding sheet,
wherein the metal sheet comprises a plurality of through holes, and
the through holes are filled with a same ferrite based material as the ferrite sheet.
2. The antenna module of claim 1 , wherein the metal sheet is enclosed with the ferrite sheet.
3. The antenna module of claim 1 , wherein the magnetic shielding sheet is made by stacking a ferrite based material on the metal sheet and integrally firing the metal sheet.
4. The antenna module of claim 1 , wherein the adhesive film is a double-side tape,
one side of the double-side tape is attached to the ferrite sheet, and
another side of the double-side tape is attached to the metal sheet.
5. The antenna module of claim 1 , wherein the metal sheet and the ferrite sheet are bonded to each other without other adhesive material.
6. An antenna module comprising:
an antenna sheet patterned with a loop coil of a conductive metal material;
a magnetic shielding sheet comprising a metal sheet and a ferrite sheet; and
an adhesive film interposed between the antenna sheet and the magnetic shielding sheet,
wherein the metal sheet comprises a plurality of through holes, and
the through holes are filled with a same ferrite based material as the ferrite sheet.
7. The antenna module of claim 6 , wherein the magnetic shielding sheet is made by integrally firing the metal sheet and the ferrite sheet.
8. The antenna module of claim 6 , wherein the magnetic shielding sheet comprises two metal sheets and has a sandwich structure in which the two metal sheets are respectively disposed on and beneath the ferrite sheet.
9. The antenna module of claim 8 , wherein the magnetic shielding sheet is made by stacking a ferrite based material between the two metal sheets and integrally firing the two metal sheets.
10. The antenna module of claim 6 , wherein the adhesive film is a double-side tape,
one side of the double-side tape is attached to the ferrite sheet, and
another side of the double-side tape is attached to the metal sheet.
11. The antenna module of claim 6 , wherein the metal sheet and the ferrite sheet are bonded to each other without other adhesive material.