NFC COMMUNICATORS
4 Assignments
0 Petitions
Accused Products
Abstract
An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field.
43 Citations
48 Claims
-
1-28. -28. (canceled)
-
29. An NFC communicator, comprising:
- an antenna circuit to enable inductive coupling, via the H field, of the near field RF communicator and another near field RF communicator in near field range;
a signal supplier coupled to the antenna circuit to supply a drive signal to cause the antenna circuit to generate an RF signal; and a receiver coupled to the antenna circuit to receive a signal inductively coupled, via the H field, to the antenna circuit from another near field RF communicator in near field range, wherein the antenna circuit comprises an antenna element coupled in parallel with a first capacitor, wherein the antenna element comprises an antenna coil in series with a second capacitor to affect a voltage resulting from inductive coupling to the antenna circuit. - View Dependent Claims (30, 31, 42, 44, 45)
- an antenna circuit to enable inductive coupling, via the H field, of the near field RF communicator and another near field RF communicator in near field range;
-
32. An NFC communicator, comprising:
-
an antenna circuit to enable inductive coupling, via the H field, of the near field RF communicator and another near field RF communicator in near field range; a signal supplier coupled to the antenna circuit to supply a drive signal to cause the antenna circuit to generate an RF signal; and a receiver coupled to the antenna circuit to receive a signal inductively coupled, via the H field, to the antenna circuit from another near field RF communicator in near field range, wherein the antenna circuit comprises an antenna element coupled in parallel with a capacitor, wherein the antenna element comprises an antenna coil having a tap and a further capacitor in series with the antenna coil, and wherein the receiver is coupled to the tap. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
-
-
43. An NFC communicator having an antenna circuit that is partially or wholly integrated with at least part of other functionality of the near field RF communicator.
- 46. An antenna circuit comprising an antenna element coupled in parallel with a first capacitor, wherein the antenna element comprises an antenna coil in series with a second capacitor to affect a voltage resulting from inductive coupling to the antenna circuit.
Specification