COMBINED RADIO FREQUENCY IDENTIFICATION (RFID) AND WIRELESS CHARGING ELECTROMAGNETIC WAVE ABSORBER, COMBINED RFID AND WIRELESS CHARGING WIRELESS ANTENNA INCLUDING SAME, AND METHOD FOR MANUFACTURING SAME
First Claim
1. A wireless identification and wireless charging electromagnetic wave absorber comprising:
- a first absorbing sheet which blocks and absorbs electromagnetic waves to improve a wireless identification function, including radio frequency identification (RFID) and near field communication (NFC); and
a second absorbing sheet which blocks and absorbs electromagnetic waves to improve the wireless identification function, wherein the second absorbing sheet is positioned inside and coplanar with the first absorbing sheet, whereby a thickness of the electromagnetic wave absorber is reduced.
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Accused Products
Abstract
A combined RFID and wireless charging electromagnetic wave absorber, a combined RFID and wireless charging wireless antenna including same, and a method for manufacturing same. The electromagnetic wave absorber not only performs separate functions of RFID and wireless charging and provides stable operating characteristics, but also has a structure in which an electromagnetic wave absorber and a wireless antenna are integrally coupled so as to maximize the respective performance thereof. Despite a structure in which the two functions of RFID and wireless charging are combined, the thickness of the antenna can be reduced, such that it can be very useful when adopted in and applied to a mobile device, thereby contributing greatly to reducing the thickness of a smartphone.
43 Citations
15 Claims
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1. A wireless identification and wireless charging electromagnetic wave absorber comprising:
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a first absorbing sheet which blocks and absorbs electromagnetic waves to improve a wireless identification function, including radio frequency identification (RFID) and near field communication (NFC); and a second absorbing sheet which blocks and absorbs electromagnetic waves to improve the wireless identification function, wherein the second absorbing sheet is positioned inside and coplanar with the first absorbing sheet, whereby a thickness of the electromagnetic wave absorber is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of fabricating a wireless identification and wireless charging electromagnetic wave absorber, comprising:
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preparing a first absorbing sheet which blocks and absorbs electromagnetic waves to improve wireless identification, such as radio frequency identification (RFID) and near field communication (NFC), by forming an accommodation hole in a central portion of the first absorbing sheet by cutting through the central portion; preparing a second absorbing sheet which blocks and absorbs electromagnetic waves to improve wireless charging, the second absorbing sheet being configured to be disposed over and fitted into the accommodation hole of the first absorbing sheet, the second absorbing sheet being distanced from the first absorbing sheet, thereby defining a space therebetween; coupling the second absorbing sheet with the first absorbing sheet such that the second absorbing sheet is disposed coplanar with the first absorbing sheet by fitting the second absorbing sheet into the accommodation hole of the first absorbing sheet; and laminating a protective sheet on bottom surfaces of the first and second absorbing sheets, which are disposed coplanar and coupled with each other, the protective sheet functioning to enhance a coupling force and protect the first and second absorbing sheets, wherein the protective sheet comprises one selected from the group consisting of a double-sided tape, a polyimide film, a polyethylene terephthalate film, a polycarbonate film, a polypropylene film and a silicone film. - View Dependent Claims (9, 10, 11)
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12. A method of fabricating a wireless identification and wireless charging antenna comprising:
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preparing a first absorbing sheet which blocks and absorbs electromagnetic waves to improve wireless identification, such as radio frequency identification (RFID) and near field communication (NFC), by forming an accommodation hole in a central portion of the first absorbing sheet by cutting through the central portion; preparing a second absorbing sheet which blocks and absorbs electromagnetic waves to improve wireless charging, the second absorbing sheet being configured to be disposed over and fitted into the accommodation hole of the first absorbing sheet, the second absorbing sheet being distanced from the first absorbing sheet, thereby defining a space therebetween; coupling the second absorbing sheet with the first absorbing sheet such that the second absorbing sheet is disposed coplanar with the first absorbing sheet by fitting the second absorbing sheet into the accommodation hole of the first absorbing sheet; laminating a protective sheet on bottom surfaces of the first and second absorbing sheets, which are disposed coplanar and coupled with each other, the protective sheet functioning to enhance a coupling force and protect the first and second absorbing sheets; and laminating a sheet-shaped flexible antenna on top surfaces of the first and second absorbing sheets, which are disposed coplanar and coupled with each other, wherein the flexible antenna comprises a wireless identification antenna pattern which enables wireless identification, such as radio frequency identification (RFID) and near field communication (NFC), and a wireless charging antenna pattern which enables wireless charging, the wireless charging antenna pattern being formed at a position divided from the wireless identification antenna pattern, the wireless identification antenna pattern being positioned over the first absorbing sheet, and the wireless charging antenna pattern being positioned over the second absorbing sheet, wherein the protective sheet comprises one selected from the group consisting of a double-sided tape, a polyimide film, a polyethylene terephthalate film, a polycarbonate film, a polypropylene film and a silicone film. - View Dependent Claims (13, 14, 15)
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Specification