Smart NFC antenna matching network system and user device including the same
First Claim
Patent Images
1. A Near Field Communication (NFC) antenna matching network system that is connected with an NFC transceiver, the NFC antenna matching network system comprising:
- a source coil connected between a first terminal and a second terminal of the NFC transceiver; and
a resonant coil physically separated from the source coil,wherein the source coil comprises a first capacitor and a second capacitor connected in series between a first end and a second end of a pattern of the source coil and the first terminal and the second terminal, respectively, to decrease impedance,wherein the resonant coil comprises a third capacitor connected in parallel between both ends of a pattern of the resonant coil to increase impedance,wherein the patterns of the source and resonant coils are printed on a film regardless of upper and lower surfaces of the film, andwherein the source and resonant coils have opposite impedance characteristics.
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Abstract
A Near Field Communication (NFC) antenna matching network system is provided for connection with an NFC. The NFC antenna matching network system includes a source coil connected between a first terminal and a second terminal of the NFC transceiver; and a resonant coil physically separated from the source coil.
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Citations
33 Claims
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1. A Near Field Communication (NFC) antenna matching network system that is connected with an NFC transceiver, the NFC antenna matching network system comprising:
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a source coil connected between a first terminal and a second terminal of the NFC transceiver; and a resonant coil physically separated from the source coil, wherein the source coil comprises a first capacitor and a second capacitor connected in series between a first end and a second end of a pattern of the source coil and the first terminal and the second terminal, respectively, to decrease impedance, wherein the resonant coil comprises a third capacitor connected in parallel between both ends of a pattern of the resonant coil to increase impedance, wherein the patterns of the source and resonant coils are printed on a film regardless of upper and lower surfaces of the film, and wherein the source and resonant coils have opposite impedance characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A user device, comprising:
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a Near Field Communication (NFC) transceiver; and an NFC antenna matching network system, wherein the NFC transceiver includes; a first terminal; a second terminal; and a reader that is connected to the first terminal and the second terminal, and wherein the NFC antenna matching network system includes; a first capacitor having a first end connected with the first terminal; a second capacitor having a first end connected with the second terminal; a source coil connected between a second end of the first capacitor and a second end of the second capacitor; and a parallel resonator physically separated from the source coil. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A user device, comprising:
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a Near Field Communication (NFC) transceiver; and an NFC antenna matching network system, wherein the NFC transceiver includes; a first terminal; a second terminal; a reader that is connected with the first terminal and the second terminal; and a card circuit that is connected with the first terminal and the second terminal, wherein the NFC antenna matching network system includes; a first capacitor having a first end connected with the first terminal; a second capacitor having a first end connected with the second terminal; a source coil connected between a second end of the first capacitor and a second end of the second capacitor; and a parallel resonator physically separated from the source coil, and wherein the parallel resonator includes; a resonant coil; and a third capacitor connected between a first end and a second end of the resonant coil. - View Dependent Claims (23, 24, 25)
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26. A user device, comprising:
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a Near Field Communication (NFC) transceiver; and an NFC antenna matching network system, wherein the NFC transceiver includes; a first terminal; a second terminal; a third terminal; a fourth terminal; a reader connected with the first terminal and the second terminal; and a card circuit connected with the third terminal and the fourth terminal, wherein the NFC antenna matching network system includes; a first capacitor having a first end connected with the first terminal and the third terminal; a second capacitor having a first end connected with the second terminal and the fourth terminal; a source coil connected between a second end of the first capacitor and a second end of the second capacitor; and a parallel resonator physically separated from the source coil, and wherein the parallel resonator includes; a resonant coil; and a third capacitor connected between a first end and a second end of the resonant coil. - View Dependent Claims (27, 28, 29)
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30. A user device, comprising:
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a Near Field Communication (NFC) transceiver; and an NFC antenna matching network system, wherein the NFC transceiver includes; a first terminal; a second terminal; a third terminal; a fourth terminal; a fifth terminal; a reader connected with the first terminal, the second terminal, and the third terminal; and a card circuit connected with the fourth terminal and the fifth terminal, wherein the NFC antenna matching network system includes; a first capacitor having a first end connected with the first terminal and the fourth terminal; a second capacitor having a first end connected with the second terminal and the fifth terminal; a source coil having a first end connected with a second end of the first capacitor, and having a second end connected with a second end of the second capacitor and the third terminal; and a parallel resonator physically separated from the source coil, and wherein the parallel resonator includes; a resonant coil; and a third capacitor connected between a first end and a second end of the resonant coil. - View Dependent Claims (31, 32, 33)
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Specification