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Mobile wireless communications device with NFC coupling circuit and related methods

  • US 8,755,744 B2
  • Filed: 10/28/2013
  • Issued: 06/17/2014
  • Est. Priority Date: 01/06/2012
  • Status: Active Grant
First Claim
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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 comprisinga 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.

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