Patent ID: 7881665
Filing Date: 2011-02-01
Classification: G06K,H04B,Y02D

Abstract:
1. An NFC communicator, comprising a data store operable to store data; an inductive coupler operable to couple inductively with the magnetic field of a radio frequency signal; a signal supplier operable to supply a radio frequency signal to the inductive coupler; a modulator operable to modulate a radio frequency signal in accordance with data; a demodulator operable to extract data from a modulated radio frequency signal inductively coupled to the coupler; a controller operable to enable the NFC communicator both to initiate near field radio frequency communication with another near field RF communicator and to respond to near field radio frequency communication initiated by another near field RF communicator, wherein the inductive coupler comprises an antenna and a variable impedance element and the controller is operable to control the variable impedance element to control a magnetic field strength associated with a radio frequency signal supplied by the signal supplier.