Mobile wireless communications device with NFC coupling circuit and related methods

摘要

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.

主权项

1. A wireless communications device comprising:
a wireless transceiver; a processor coupled to said wireless transceiver; a near field communication (NFC) circuit coupled to said processor; an NFC antenna; and a coupling circuit between said NFC circuit and said NFC antenna comprising
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, anda receive branch coupled between said NFC circuit and the first node between the first pair of capacitors of said plurality thereof.