Near field communications, NFC, communicators and NFC communications enabled devices
First Claim
1. An NFC communicator, comprisinga 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.
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0 Petitions
Accused Products
Abstract
A NFC communicator or NFC communications enabled device (100) has a data store (108) to store data, an inductive coupler (102) to couple inductively with the magnetic field of a radio frequency signal and a signal supplier (109) to supply a radio frequency signal to the inductive coupler. A modulator (110) is provided to modulate a radio frequency signal in accordance with data and a demodulator (114) is provided to extract data from a modulated radio frequency signal inductively coupled to the coupler. A controller (107) enables the NFC communicator or NFC communications enabled device 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. The inductive coupler (102) has an antenna (120) and a variable impedance element (200) and the controller (107) is operable to control the variable impedance element (200) to control a magnetic field strength associated with a radio frequency signal supplied by the signal supplier.
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Citations
21 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An NFC communicator, comprising:
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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 at least one of the signal supplier, the modulator, the demodulator and the inductive coupler comprises a variable impedance element and the controller is operable to control the variable impedance. - View Dependent Claims (20)
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21. An NFC communicator, comprising:
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data storing means for storing data; inductive coupling means for coupling inductively with the magnetic field of a radio frequency signal; signal generating means for supplying a radio frequency signal to the inductive coupling means; modulating means for modulating a radio frequency signal in accordance with data; demodulating means for extracting data from a modulated radio frequency signal inductively coupled to the coupling means; and controlling means for enabling 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 coupling means comprises antenna means and variable impedance means and the controlling means is operable to control the variable impedance means to control a magnetic field strength associated with a radio frequency signal supplied by the signal supplying means.
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Specification