Sheet for shielding against electromagnetic waves and wireless power charging device
First Claim
Patent Images
1. A sheet for shielding against electromagnetic waves, the sheet comprising:
- a first magnetic material having a plurality of through holes formed in a thickness direction; and
a second magnetic material filling the plurality of through holes and blocking a frequency band including higher frequencies of electromagnetic waves than a frequency band blocked by the first magnetic material having the plurality of through holes formed therein,wherein the plurality of through holes are evenly distributed as an array in the first magnetic material.
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Abstract
A sheet for shielding against electromagnetic waves includes a first magnetic material having a plurality of through holes formed in a thickness direction, and a second magnetic material filling the plurality of through holes and blocking a frequency band different from that of electromagnetic waves blocked by the first magnetic material.
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Citations
18 Claims
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1. A sheet for shielding against electromagnetic waves, the sheet comprising:
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a first magnetic material having a plurality of through holes formed in a thickness direction; and a second magnetic material filling the plurality of through holes and blocking a frequency band including higher frequencies of electromagnetic waves than a frequency band blocked by the first magnetic material having the plurality of through holes formed therein, wherein the plurality of through holes are evenly distributed as an array in the first magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sheet for shielding against electromagnetic waves, the sheet comprising:
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a first magnetic material having a plurality of through holes formed in a thickness direction; and a second magnetic material filling the plurality of through holes and blocking a frequency band different from that of electromagnetic waves blocked by the first magnetic material, wherein the first and second magnetic materials are provided in a plurality of magnetic layers to have a stacked structure, and wherein the second magnetic material in a magnetic layer among the plurality of magnetic layers is staggered relative to the second magnetic material disposed thereabove or therebelow in an adjacent magnetic layer among the plurality of magnetic layers.
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17. A wireless power charging device comprising:
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a coil unit; and an electromagnetic wave blocking sheet disposed between the coil unit and an external battery having a first magnetic material having a plurality of through holes formed in a thickness direction, and a second magnetic material filling the plurality of through holes and blocking a frequency band different from that of an electromagnetic wave blocked by the first magnetic material, wherein the plurality of through holes are evenly distributed as an array in the first magnetic material, and wherein the second magnetic material blocks the frequency band including higher frequencies of electromagnetic waves than a frequency band blocked by the first magnetic material. - View Dependent Claims (18)
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Specification