Magnetic field shielding structure and mobile device including the magnetic field structure
A magnetic field shielding structure includes a magnetic layer and a resonance reactive shielding circuit including a capacitor and a conductor connected to the capacitor and having a loop form. At least a portion of the magnetic layer overlaps an area surrounded by the conductor in a thickness direction of the magnetic layer.
1. A magnetic field shielding structure comprising:
a magnetic layer; and
a resonance reactive shielding circuit comprising a capacitor and a conductor, the conductor connected to the capacitor and having a loop form,
wherein the magnetic layer and the conductor are on a same level, and
wherein the conductor surrounds all side surfaces of the magnetic layer.
2. The magnetic field shielding structure of claim 1 , wherein the capacitor is on a surface of the magnetic layer.
3. The magnetic field shielding structure of claim 1 , further comprising:
a bonding layer interposed between the magnetic layer and the conductor and bonding the magnetic layer to the conductor.
4. The magnetic field shielding structure of claim 1 , wherein the conductor is a conductor in a circuit board.
5. The magnetic field shielding structure of claim 1 , wherein the capacitor is a multilayer ceramic capacitor.
6. The magnetic field shielding structure of claim 1 , wherein the conductor is a coil having at least two turns.
7. The magnetic field shielding structure of claim 6 , wherein the coil is a solenoid.
8. The magnetic field shielding structure of claim 6 , wherein different turns of the coil are on a same level.
9. The magnetic field shielding structure of claim 1 , wherein the capacitor and the conductor form an LC circuit.
10. The magnetic field shielding structure of claim 1 , wherein the resonance reactive shielding circuit is electrically isolated.
11. The magnetic field shielding structure of claim 1 , wherein the magnetic layer comprises a plurality of magnetic layers in a stacked structure.
12. The magnetic field shielding structure of claim 1 , further comprising:
an additional resonance reactive shielding circuit.
13. A mobile device comprising:
a mobile device body;
a battery;
a coil portion; and
a magnetic field shielding structure interposed between the battery and the coil portion, the magnetic field shielding structure comprising a magnetic layer and a resonance reactive shielding circuit, the resonance reactive shielding circuit comprising a capacitor and a conductor, the conductor connected to the capacitor and having a loop form,
wherein the magnetic layer and the conductor are on a same level, and
wherein the conductor surrounds all side surfaces of the magnetic layer.
14. A magnetic field shielding structure comprising:
a magnetic layer; and
a resonance reactive shielding circuit configured to block at least a portion of a magnetic field passing through the magnetic layer, the resonance reactive shielding circuit comprising a capacitor and a conductor, the conductor connected to both ends of the capacitor and having a loop form,
wherein the magnetic layer and the conductor are on a same level, and
wherein the conductor surrounds all side surfaces of the magnetic layer.
15. The magnetic field shielding structure of claim 14 , wherein the resonance reactive shielding circuit has a resonant frequency substantially equal to a frequency of the magnetic field.
16. A mobile device comprising:
a mobile device body;
a battery in the mobile device body;
a power receiving coil in the mobile device body, the power receiving coil configured to receive wireless power by either one or both of magnetic induction and magnetic resonance; and
a magnetic field shielding structure in the mobile device body between the battery and the power receiving coil, the magnetic field shielding structure configured to block at least a portion of a magnetic field generated by the power receiving coil from reaching the battery,
wherein the magnetic field shielding structure comprises,
a magnetic layer configured to block at least a portion of the magnetic field generated by the power receiving coil from passing through the magnetic layer, and
a resonance reactive shielding circuit configured to block at least a portion of any leakage magnetic field passing through the magnetic layer from the magnetic field generated by the power receiving coil, the resonance reactive shielding circuit comprising a capacitor and a conductor, the conductor connected to both ends of the capacitor and having a loop form,
wherein the magnetic layer and the conductor are on a same level, and
wherein the conductor surrounds all side surfaces of the magnetic layer.
17. The mobile device of claim 16 , wherein the magnetic layer is further configured to block the at least a portion of the magnetic field generated by the power receiving coil by a magnetic induction method; and
the resonance reactive shielding circuit is further configured to block the at least a portion of any leakage magnetic field passing through the magnetic layer by a magnetic resonance method.