Mobile wireless communications device with NFC coupling circuit and related methods
First Claim
1. An electronic device comprising:
- a near field communication (NFC) antenna;
an NFC circuit;
a capacitive network comprising a plurality of capacitors coupled in series with each other and in parallel with said NFC antenna;
a transmit branch coupled between said NFC circuit and a first node between a first pair of capacitors of said plurality thereof; and
a receive branch coupled between said NFC circuit and the first node between the first pair of capacitors of said plurality thereof.
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Accused Products
Abstract
A mobile wireless communications device may include a housing, a wireless transceiver carried by the housing, a processor carried by the housing and coupled to the wireless transceiver, and an NFC IC carried by the housing and coupled to the processor. The mobile wireless communications device may also include an NFC antenna carried by the housing, and a coupling circuit between the NFC IC and the NFC antenna. The coupling circuit may include a capacitive network including capacitors coupled in series with each other and in parallel with the NFC antenna, a transmit branch coupled between the NFC IC and a first node between a first pair of capacitors, and a receive branch coupled between the NFC IC and the first node between the first pair of capacitors.
15 Citations
20 Claims
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1. An electronic device comprising:
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a near field communication (NFC) antenna; an NFC circuit; a capacitive network comprising a plurality of capacitors coupled in series with each other and in parallel with said NFC antenna; a transmit branch coupled between said NFC circuit and a first node between a first pair of capacitors of said plurality thereof; and a receive branch coupled between said NFC circuit and the first node between the first pair of capacitors of said plurality thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A electronic device comprising:
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a near field communication (NFC) antenna; an NFC circuit configured to operate in an IC card emulation mode or a reader/writer mode; a capacitive network comprising a plurality of capacitors coupled in series with each other and in parallel with said NFC antenna; a transmit branch coupled between said NFC circuit and a first node between a first pair of capacitors of said plurality thereof; a receive branch coupled between said NFC circuit and the first node between the first pair of capacitors of said plurality thereof; and at least one tuning branch coupled between said NFC circuit and a second node between a second pair of capacitors of said plurality thereof. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for making an electronic device comprising a near field communication (NFC) antenna and an NFC circuit, the method comprising:
coupling the NFC circuit and the NFC antenna together using a capacitive network comprising a plurality of capacitors in series with each other and in parallel with the NFC antenna by at least coupling a transmit branch between the NFC circuit and a first node between a first pair of capacitors of the plurality thereof, and coupling a receive branch between the NFC circuit and the first node between the first pair of capacitors of the plurality thereof. - View Dependent Claims (16, 17, 18, 19, 20)
Specification