Smart NFC antenna matching network system having multiple antennas and user device including the same
First Claim
1. A near field communication (NFC) antenna matching network system connected to an NFC transceiver, the NFC antenna network matching system comprising:
- a matching circuit connected to first and second antenna terminals and to the NFC transceiver, the matching circuit being configured to match impedances of the NFC antenna network matching system and the NFC transceiver; and
a plurality of NFC antennas connected in parallel with the first and second antenna terminals,wherein each of the NFC antennas includes,a source coil connected between the first antenna terminal and the second antenna terminal, anda resonance coil physically separated from the source coil and configured to exchange signals with the source coil via inductive coupling.
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Accused Products
Abstract
At least one example embodiment provides a near field communication (NFC) antenna matching network system connected to an NFC transceiver. The NFC antenna matching network system includes a matching circuit connected to first and second antenna terminals and to the NFC transceiver. The matching circuit is configured to match impedances of the NFC antenna network matching system and the NFC transceiver. The NFC antenna matching network system includes a plurality of NFC antennas connected in parallel with the first and second antenna terminals. Each of the NFC antennas includes a source coil and a resonance coil. The source coil is connected between the first antenna terminal and the second antenna terminal. The resonance coil is physically separated from the source coil and configured to exchange signals with the source coil via inductive coupling.
17 Citations
19 Claims
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1. A near field communication (NFC) antenna matching network system connected to an NFC transceiver, the NFC antenna network matching system comprising:
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a matching circuit connected to first and second antenna terminals and to the NFC transceiver, the matching circuit being configured to match impedances of the NFC antenna network matching system and the NFC transceiver; and a plurality of NFC antennas connected in parallel with the first and second antenna terminals, wherein each of the NFC antennas includes, a source coil connected between the first antenna terminal and the second antenna terminal, and a resonance coil physically separated from the source coil and configured to exchange signals with the source coil via inductive coupling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A user device comprising:
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a near field communication (NFC) transceiver; and an NFC antenna matching network system connected to the NFC transceiver, wherein the NFC antenna matching network system includes, a first capacitor connected between a first terminal of the NFC transceiver and a first antenna terminal, a second capacitor connected between a second terminal of the NFC transceiver and a second antenna terminal, a plurality of source coils connected in parallel between the first antenna terminal and the second antenna terminal, and a plurality of parallel resonators corresponding to the source coils, each of the parallel resonators being physically separated from a corresponding one of the plurality of source coils. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A device, comprising:
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at least one antenna including a serial resonator and a parallel resonator electrically isolated from each other and configured to exchange signals via inductive coupling; a transceiver configured to receive and transmit the exchanged signals; and a matching circuit electrically connected between the transceiver and the serial resonator, the matching circuit being configured to match impedances within the device. - View Dependent Claims (16, 17, 18, 19)
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Specification